更改日志¶

Changelog

版本遵循语义版本控制 (<major>.<minor>.<patch>)。

向后不兼容（重大）更改将仅在主要版本中引入，并在发布的弃用部分中提前通知。

Versions follow Semantic Versioning (<major>.<minor>.<patch>).

Backward incompatible (breaking) changes will only be introduced in major versions with advance notice in the Deprecations section of releases.

To be included in v0.1 (if present)¶

pytest 0.1 [UNRELEASED DRAFT] (2024-10-30)¶

New features¶

#12765: Thresholds to trigger snippet truncation can now be set with truncation_limit_lines and truncation_limit_chars.

See 修改截断限制 for more information.

Improvements in existing functionality¶

#11118: Now pythonpath configures $PYTHONPATH earlier than before during the initialization process, which now also affects plugins loaded via the -p command-line option.

– by @millerdev
#11372: Async tests will now fail, instead of warning+skipping, if you don’t have any suitable plugin installed.
#12707: Exception chains can be navigated when dropped into Pdb in Python 3.13+.
#4112: Using pytest.mark.usefixtures on pytest.param() now produces an error instead of silently doing nothing.
#6985: Improved pytest.approx() to enhance the readability of value ranges and tolerances between 0.001 and 1000.
- The repr method now provides clearer output for values within those ranges, making it easier to interpret the results.
- Previously, the output for those ranges of values and tolerances was displayed in scientific notation (e.g., 42 ± 1.0e+00). The updated method now presents the tolerance as a decimal for better readability (e.g., 42 ± 1).
  
  Example:
  
  Previous Output:
  >>> pytest.approx(42, abs=1) 42 ± 1.0e+00
  Current Output:
  >>> pytest.approx(42, abs=1) 42 ± 1
– by @fazeelghafoor

Bug fixes¶

#12008: In #11220, an unintended change in reordering was introduced by changing the way indices were assigned to direct params. More specifically, before that change, the indices of direct params to metafunc’s callspecs were assigned after all parametrizations took place. Now, that change is reverted.
#12592: Fixed KeyError crash when using --import-mode=importlib in a directory layout where a directory contains a child directory with the same name.
#12818: Assertion rewriting now preserves the source ranges of the original instructions, making it play well with tools that deal with the AST, like executing.
#9037: Honor disable_test_id_escaping_and_forfeit_all_rights_to_community_support when escaping ids in parametrized tests.

Improved documentation¶

#10558: Fix ambiguous docstring of pytest.Config.getoption().
#12866: Improved cross-references concerning the recwarn fixture.
#6649: Added TerminalReporter to the API 参考 documentation page.

Contributor-facing changes¶

#12497: Fixed two failing pdb-related tests on Python 3.13.

Miscellaneous internal changes¶

#12346: Tests will now fail, instead of raising a warning, if they return any value other than None.
#6649: Added TerminalReporter to the public pytest API, as it is part of the signature of the pytest_terminal_summary hook.

Released versions¶

pytest 8.3.3 (2024-09-09)¶

bug修复¶

Bug fixes

#12446：避免在装置发现期间调用 ``@property``（和其他实例描述符）–by @asottile
#12659：修复了在 pytest>=8.1 中使用参数 --import-mode=importlib 时不显示断言失败差异的问题。
#12667：修复了 ExceptionInfo.errisinstance 中的类型更改导致 mypy 失败的回归问题。
#12744：修复了与 Python 3.9 或更低版本的类型兼容性 - 将 typing.Self 替换为 typing_extensions.Self - 作者：@Avasam
#12745：修复了 Windows 上 nodeid 路径中反斜杠转换错误的问题，确保跨环境的路径处理一致。
#6682：修复了打印失败断言的“msg”部分时不遵守详细程度的错误（如 assert condition, msg）。
#9422: 修复通过 -p no:terminal 禁用终端插件会导致因缺少 verbose 选项而崩溃的错误。

– 作者：@GTowers1

#12446: Avoid calling @property (and other instance descriptors) during fixture discovery – by @asottile
#12659: Fixed the issue of not displaying assertion failure differences when using the parameter --import-mode=importlib in pytest>=8.1.
#12667: Fixed a regression where type change in ExceptionInfo.errisinstance caused mypy to fail.
#12744: Fixed typing compatibility with Python 3.9 or less – replaced typing.Self with typing_extensions.Self – by @Avasam
#12745: Fixed an issue with backslashes being incorrectly converted in nodeid paths on Windows, ensuring consistent path handling across environments.
#6682: Fixed bug where the verbosity levels where not being respected when printing the “msg” part of failed assertion (as in assert condition, msg).
#9422: Fix bug where disabling the terminal plugin via -p no:terminal would cause crashes related to missing the verbose option.

– by @GTowers1

改进的文档¶

Improved documentation

#12663：澄清当取消选择项目时，应从 pytest_collection_modifyitems 钩子实现中调用 pytest_deselected 钩子。
#12678：从文档中的 tmp_path_retention_policy 示例中删除错误的引号。

#12663: Clarify that the pytest_deselected hook should be called from pytest_collection_modifyitems hook implementations when items are deselected.
#12678: Remove erroneous quotes from tmp_path_retention_policy example in docs.

Miscellaneous internal changes¶

#12769: 修复 codespell 发现的拼写错误，并将 codespell 添加到预提交挂钩中。

pytest 8.3.2 (2024-07-24)¶

Bug fixes¶

#12652: Resolve regression conda environments where no longer being automatically detected.

– by @RonnyPfannschmidt

pytest 8.3.1 (2024-07-20)¶

The 8.3.0 release failed to include the change notes and docs for the release. This patch release remedies this. There are no other changes.

pytest 8.3.0 (2024-07-20)¶

New features¶

#12231: Added --xfail-tb flag, which turns on traceback output for XFAIL results.
- If the --xfail-tb flag is not given, tracebacks for XFAIL results are NOT shown.
- The style of traceback for XFAIL is set with --tb, and can be auto|long|short|line|native|no.
- Note: Even if you have --xfail-tb set, you won’t see them if --tb=no.
Some history:

With pytest 8.0, -rx or -ra would not only turn on summary reports for xfail, but also report the tracebacks for xfail results. This caused issues with some projects that utilize xfail, but don’t want to see all of the xfail tracebacks.

This change detaches xfail tracebacks from -rx, and now we turn on xfail tracebacks with --xfail-tb. With this, the default -rx/ -ra behavior is identical to pre-8.0 with respect to xfail tracebacks. While this is a behavior change, it brings default behavior back to pre-8.0.0 behavior, which ultimately was considered the better course of action.

– by @okken
#12281: Added support for keyword matching in marker expressions.

Now tests can be selected by marker keyword arguments. Supported values are int, (unescaped) str, bool & None.

See marker examples for more information.

– by @lovetheguitar
#12567: Added --no-fold-skipped command line option.

If this option is set, then skipped tests in short summary are no longer grouped by reason but all tests are printed individually with their nodeid in the same way as other statuses.

– by @pbrezina

Improvements in existing functionality¶

#12469: The console output now uses the “third-party plugins” terminology, replacing the previously established but confusing and outdated reference to setuptools – by @webknjaz.
#12544, #12545: Python virtual environment detection was improved by checking for a pyvenv.cfg file, ensuring reliable detection on various platforms – by @zachsnickers.
#2871: Do not truncate arguments to functions in output when running with -vvv.

#389: The readability of assertion introspection of bound methods has been enhanced – by @farbodahm, @webknjaz, @obestwalter, @flub and @glyphack.

Earlier, it was like:

=================================== FAILURES ===================================
_____________________________________ test _____________________________________

    def test():
>       assert Help().fun() == 2
E       assert 1 == 2
E        +  where 1 = <bound method Help.fun of <example.Help instance at 0x256a830>>()
E        +    where <bound method Help.fun of <example.Help instance at 0x256a830>> = <example.Help instance at 0x256a830>.fun
E        +      where <example.Help instance at 0x256a830> = Help()

example.py:7: AssertionError
=========================== 1 failed in 0.03 seconds ===========================

And now it’s like:

=================================== FAILURES ===================================
_____________________________________ test _____________________________________

    def test():
>       assert Help().fun() == 2
E       assert 1 == 2
E        +  where 1 = fun()
E        +    where fun = <test_local.Help object at 0x1074be230>.fun
E        +      where <test_local.Help object at 0x1074be230> = Help()

test_local.py:13: AssertionError
=========================== 1 failed in 0.03 seconds ===========================

#7662: Added timezone information to the testsuite timestamp in the JUnit XML report.

Bug fixes¶

#11706: Fixed reporting of teardown errors in higher-scoped fixtures when using --maxfail or --stepwise.

Originally added in pytest 8.0.0, but reverted in 8.0.2 due to a regression in pytest-xdist. This regression was fixed in pytest-xdist 3.6.1.
#11797: pytest.approx() now correctly handles Sequence-like objects.
#12204, #12264: Fixed a regression in pytest 8.0 where tracebacks get longer and longer when multiple tests fail due to a shared higher-scope fixture which raised – by @bluetech.

Also fixed a similar regression in pytest 5.4 for collectors which raise during setup.

The fix necessitated internal changes which may affect some plugins:
- FixtureDef.cached_result[2] is now a tuple (exc, tb) instead of exc.
- SetupState.stack failures are now a tuple (exc, tb) instead of exc.
#12275: Fixed collection error upon encountering an abstract class, including abstract unittest.TestCase subclasses.
#12328: Fixed a regression in pytest 8.0.0 where package-scoped parameterized items were not correctly reordered to minimize setups/teardowns in some cases.
#12424: Fixed crash with assert testcase is not None assertion failure when re-running unittest tests using plugins like pytest-rerunfailures. Regressed in 8.2.2.
#12472: Fixed a crash when returning category "error" or "failed" with a custom test status from pytest_report_teststatus hook – @pbrezina.
#12505: Improved handling of invalid regex patterns in pytest.raises(match=r'...') by providing a clear error message.
#12580: Fixed a crash when using the cache class on Windows and the cache directory was created concurrently.
#6962: Parametrization parameters are now compared using == instead of is (is is still used as a fallback if the parameter does not support ==). This fixes use of parameters such as lists, which have a different id but compare equal, causing fixtures to be re-computed instead of being cached.
#7166: Fixed progress percentages (the [ 87%] at the edge of the screen) sometimes not aligning correctly when running with pytest-xdist -n.

Improved documentation¶

#12153: Documented using PYTEST_VERSION to detect if code is running from within a pytest run.
#12469: The external plugin mentions in the documentation now avoid mentioning setuptools entry-points as the concept is much more generic nowadays. Instead, the terminology of “external”, “installed”, or “third-party” plugins (or packages) replaces that.

– by @webknjaz
#12577: CI and BUILD_NUMBER environment variables role is described in the reference doc. They now also appear when doing pytest -h – by @MarcBresson.

Contributor-facing changes¶

#12467: Migrated all internal type-annotations to the python3.10+ style by using the annotations future import.

– by @RonnyPfannschmidt
#11771, #12557: The PyPy runtime version has been updated to 3.9 from 3.8 that introduced a flaky bug at the garbage collector which was not expected to fix there as the 3.8 is EoL.

– by @x612skm
#12493: The change log draft preview integration has been refactored to use a third party extension sphinxcontib-towncrier. The previous in-repo script was putting the change log preview file at doc/en/_changelog_towncrier_draft.rst. Said file is no longer ignored in Git and might show up among untracked files in the development environments of the contributors. To address that, the contributors can run the following command that will clean it up:
```
$ git clean -x -i -- doc/en/_changelog_towncrier_draft.rst
```
– by @webknjaz
#12498: All the undocumented tox environments now have descriptions. They can be listed in one’s development environment by invoking tox -av in a terminal.

– by @webknjaz
#12501: The changelog configuration has been updated to introduce more accurate audience-tailored categories. Previously, there was a trivial change log fragment type with an unclear and broad meaning. It was removed and we now have contrib, misc and packaging in place of it.

The new change note types target the readers who are downstream packagers and project contributors. Additionally, the miscellaneous section is kept for unspecified updates that do not fit anywhere else.

– by @webknjaz
#12502: The UX of the GitHub automation making pull requests to update the plugin list has been updated. Previously, the maintainers had to close the automatically created pull requests and re-open them to trigger the CI runs. From now on, they only need to click the Ready for review button instead.

– by @webknjaz
#12522: The :pull: RST role has been replaced with a shorter :pr: due to starting to use the implementation from the third-party sphinx-issues Sphinx extension – by @webknjaz.
#12531: The coverage reporting configuration has been updated to exclude pytest’s own tests marked as expected to fail from the coverage report. This has an effect of reducing the influence of flaky tests on the resulting number.

– by @webknjaz
#12533: The extlinks Sphinx extension is no longer enabled. The :bpo: role it used to declare has been removed with that. BPO itself has migrated to GitHub some years ago and it is possible to link the respective issues by using their GitHub issue numbers and the :issue: role that the sphinx-issues extension implements.

– by @webknjaz
#12562: Possible typos in using the :user: RST role is now being linted through the pre-commit tool integration – by @webknjaz.

pytest 8.2.2 (2024-06-04)¶

Bug Fixes¶

#12355: Fix possible catastrophic performance slowdown on a certain parametrization pattern involving many higher-scoped parameters.
#12367: Fix a regression in pytest 8.2.0 where unittest class instances (a fresh one is created for each test) were not released promptly on test teardown but only on session teardown.
#12381: Fix possible “Directory not empty” crashes arising from concurrent cache dir (.pytest_cache) creation. Regressed in pytest 8.2.0.

Improved Documentation¶

#12290: Updated Sphinx theme to use Furo instead of Flask, enabling Dark mode theme.
#12356: Added a subsection to the documentation for debugging flaky tests to mention lack of thread safety in pytest as a possible source of flakiness.
#12363: The documentation webpages now links to a canonical version to reduce outdated documentation in search engine results.

pytest 8.2.1 (2024-05-19)¶

Improvements¶

#12334: Support for Python 3.13 (beta1 at the time of writing).

Bug Fixes¶

#12120: Fix PermissionError crashes arising from directories which are not selected on the command-line.
#12191: Keyboard interrupts and system exits are now properly handled during the test collection.
#12300: Fixed handling of ‘Function not implemented’ error under squashfuse_ll, which is a different way to say that the mountpoint is read-only.
#12308: Fix a regression in pytest 8.2.0 where the permissions of automatically-created .pytest_cache directories became rwx------ instead of the expected rwxr-xr-x.

Trivial/Internal Changes¶

#12333: pytest releases are now attested using the recent Artifact Attestation support from GitHub, allowing users to verify the provenance of pytest’s sdist and wheel artifacts.

pytest 8.2.0 (2024-04-27)¶

Breaking Changes¶

#12089: pytest now requires that unittest.TestCase subclasses can be instantiated freely using MyTestCase('runTest').

If the class doesn’t allow this, you may see an error during collection such as AttributeError: 'MyTestCase' object has no attribute 'runTest'.

Classes which do not override __init__, or do not access the test method in __init__ using getattr or similar, are unaffected.

Classes which do should take care to not crash when "runTest" is given, as is shown in unittest.TestCases’s implementation. Alternatively, consider using setUp instead of __init__.

If you run into this issue using tornado.AsyncTestCase, please see issue 12263.

If you run into this issue using an abstract TestCase subclass, please see issue 12275.

Historical note: the effect of this change on custom TestCase implementations was not properly considered initially, this is why it was done in a minor release. We apologize for the inconvenience.

Deprecations¶

#12069: A deprecation warning is now raised when implementations of one of the following hooks request a deprecated py.path.local parameter instead of the pathlib.Path parameter which replaced it:
- pytest_ignore_collect - the path parameter - use collection_path instead.
- pytest_collect_file - the path parameter - use file_path instead.
- pytest_pycollect_makemodule - the path parameter - use module_path instead.
- pytest_report_header - the startdir parameter - use start_path instead.
- pytest_report_collectionfinish - the startdir parameter - use start_path instead.
The replacement parameters are available since pytest 7.0.0. The old parameters will be removed in pytest 9.0.0.

See py.path.local arguments for hooks replaced with pathlib.Path for more details.

Features¶

#11871: Added support for reading command line arguments from a file using the prefix character @, like e.g.: pytest @tests.txt. The file must have one argument per line.

See Read arguments from file for details.

Improvements¶

#11523: pytest.importorskip() will now issue a warning if the module could be found, but raised ImportError instead of ModuleNotFoundError.

The warning can be suppressed by passing exc_type=ImportError to pytest.importorskip().

See pytest.importorskip default behavior regarding ImportError for details.
#11728: For unittest-based tests, exceptions during class cleanup (as raised by functions registered with TestCase.addClassCleanup) are now reported instead of silently failing.
#11777: Text is no longer truncated in the short test summary info section when -vv is given.
#12112: Improved namespace packages detection when consider_namespace_packages is enabled, covering more situations (like editable installs).
#9502: Added PYTEST_VERSION environment variable which is defined at the start of the pytest session and undefined afterwards. It contains the value of pytest.__version__, and among other things can be used to easily check if code is running from within a pytest run.

Bug Fixes¶

#12065: Fixed a regression in pytest 8.0.0 where test classes containing setup_method and tests using @staticmethod or @classmethod would crash with AttributeError: 'NoneType' object has no attribute 'setup_method'.

Now the request.instance attribute of tests using @staticmethod and @classmethod is no longer None, but a fresh instance of the class, like in non-static methods. Previously it was None, and all fixtures of such tests would share a single self.
#12135: Fixed issue where fixtures adding their finalizer multiple times to fixtures they request would cause unreliable and non-intuitive teardown ordering in some instances.
#12194: Fixed a bug with --importmode=importlib and --doctest-modules where child modules did not appear as attributes in parent modules.
#1489: Fixed some instances where teardown of higher-scoped fixtures was not happening in the reverse order they were initialized in.

Trivial/Internal Changes¶

#12069: pluggy>=1.5.0 is now required.
#12167: cache: create supporting files (CACHEDIR.TAG, .gitignore, etc.) in a temporary directory to provide atomic semantics.

pytest 8.1.2 (2024-04-26)¶

Bug Fixes¶

#12114: Fixed error in pytest.approx() when used with numpy arrays and comparing with other types.

pytest 8.1.1 (2024-03-08)¶

Note

This release is not a usual bug fix release – it contains features and improvements, being a follow up to 8.1.0, which has been yanked from PyPI.

Features¶

#11475: Added the new consider_namespace_packages configuration option, defaulting to False.

If set to True, pytest will attempt to identify modules that are part of namespace packages when importing modules.
#11653: Added the new verbosity_test_cases configuration option for fine-grained control of test execution verbosity. See Fine-grained verbosity for more details.

Improvements¶

#10865: pytest.warns() now validates that warnings.warn() was called with a str or a Warning. Currently in Python it is possible to use other types, however this causes an exception when warnings.filterwarnings() is used to filter those warnings (see CPython #103577 for a discussion). While this can be considered a bug in CPython, we decided to put guards in pytest as the error message produced without this check in place is confusing.
#11311: When using --override-ini for paths in invocations without a configuration file defined, the current working directory is used as the relative directory.

Previously this would raise an AssertionError.
#11475: –import-mode=importlib now tries to import modules using the standard import mechanism (but still without changing sys.path), falling back to importing modules directly only if that fails.

This means that installed packages will be imported under their canonical name if possible first, for example app.core.models, instead of having the module name always be derived from their path (for example .env310.lib.site_packages.app.core.models).
#11801: Added the iter_parents() helper method on nodes. It is similar to listchain, but goes from bottom to top, and returns an iterator, not a list.
#11850: Added support for sys.last_exc for post-mortem debugging on Python>=3.12.
#11962: In case no other suitable candidates for configuration file are found, a pyproject.toml (even without a [tool.pytest.ini_options] table) will be considered as the configuration file and define the rootdir.
#11978: Add --log-file-mode option to the logging plugin, enabling appending to log-files. This option accepts either "w" or "a" and defaults to "w".

Previously, the mode was hard-coded to be "w" which truncates the file before logging.
#12047: When multiple finalizers of a fixture raise an exception, now all exceptions are reported as an exception group. Previously, only the first exception was reported.

Bug Fixes¶

#11475: Fixed regression where --importmode=importlib would import non-test modules more than once.
#11904: Fixed a regression in pytest 8.0.0 that would cause test collection to fail due to permission errors when using --pyargs.

This change improves the collection tree for tests specified using --pyargs, see #12043 for a comparison with pytest 8.0 and <8.
#12011: Fixed a regression in 8.0.1 whereby setup_module xunit-style fixtures are not executed when --doctest-modules is passed.
#12014: Fix the stacklevel used when warning about marks used on fixtures.
#12039: Fixed a regression in 8.0.2 where tests created using tmp_path have been collected multiple times in CI under Windows.

Improved Documentation¶

#11790: Documented the retention of temporary directories created using the tmp_path fixture in more detail.

Trivial/Internal Changes¶

#11785: Some changes were made to private functions which may affect plugins which access them:
- FixtureManager._getautousenames() now takes a Node itself instead of the nodeid.
- FixtureManager.getfixturedefs() now takes the Node itself instead of the nodeid.
- The _pytest.nodes.iterparentnodeids() function is removed without replacement. Prefer to traverse the node hierarchy itself instead. If you really need to, copy the function from the previous pytest release.
#12069: Delayed the deprecation of the following features to 9.0.0:
- fspath argument for Node constructors replaced with pathlib.Path.
- py.path.local arguments for hooks replaced with pathlib.Path.
It was discovered after 8.1.0 was released that the warnings about the impeding removal were not being displayed, so the team decided to revert the removal.

This is the reason for 8.1.0 being yanked.

pytest 8.1.0 (YANKED)¶

Note

This release has been yanked: it broke some plugins without the proper warning period, due to some warnings not showing up as expected.

See #12069.

pytest 8.0.2 (2024-02-24)¶

Bug Fixes¶

#11895: Fix collection on Windows where initial paths contain the short version of a path (for example c:\PROGRA~1\tests).
#11953: Fix an IndexError crash raising from getstatementrange_ast.
#12021: Reverted a fix to --maxfail handling in pytest 8.0.0 because it caused a regression in pytest-xdist whereby session fixture teardowns may get executed multiple times when the max-fails is reached.

pytest 8.0.1 (2024-02-16)¶

Bug Fixes¶

#11875: Correctly handle errors from getpass.getuser() in Python 3.13.
#11879: Fix an edge case where ExceptionInfo._stringify_exception could crash pytest.raises().
#11906: Fix regression with pytest.warns() using custom warning subclasses which have more than one parameter in their __init__.
#11907: Fix a regression in pytest 8.0.0 whereby calling pytest.skip() and similar control-flow exceptions within a pytest.warns() block would get suppressed instead of propagating.
#11929: Fix a regression in pytest 8.0.0 whereby autouse fixtures defined in a module get ignored by the doctests in the module.
#11937: Fix a regression in pytest 8.0.0 whereby items would be collected in reverse order in some circumstances.

pytest 8.0.0 (2024-01-27)¶

Bug Fixes¶

#11842: Properly escape the reason of a skip mark when writing JUnit XML files.
#11861: Avoid microsecond exceeds 1_000_000 when using log-date-format with %f specifier, which might cause the test suite to crash.

pytest 8.0.0rc2 (2024-01-17)¶

Improvements¶

#11233: Improvements to -r for xfailures and xpasses:
- Report tracebacks for xfailures when -rx is set.
- Report captured output for xpasses when -rX is set.
- For xpasses, add - in summary between test name and reason, to match how xfail is displayed.
#11825: The pytest_plugin_registered hook has a new plugin_name parameter containing the name by which plugin is registered.

Bug Fixes¶

#11706: Fix reporting of teardown errors in higher-scoped fixtures when using --maxfail or --stepwise.

NOTE: This change was reverted in pytest 8.0.2 to fix a regression it caused in pytest-xdist.
#11758: Fixed IndexError: string index out of range crash in if highlighted[-1] == "\n" and source[-1] != "\n". This bug was introduced in pytest 8.0.0rc1.
#9765, #11816: Fixed a frustrating bug that afflicted some users with the only error being assert mod not in mods. The issue was caused by the fact that str(Path(mod)) and mod.__file__ don’t necessarily produce the same string, and was being erroneously used interchangeably in some places in the code.

This fix also broke the internal API of PytestPluginManager.consider_conftest by introducing a new parameter – we mention this in case it is being used by external code, even if marked as private.

pytest 8.0.0rc1 (2023-12-30)¶

Breaking Changes¶

Old Deprecations Are Now Errors¶

#7363: PytestRemovedIn8Warning deprecation warnings are now errors by default.

Following our plan to remove deprecated features with as little disruption as possible, all warnings of type PytestRemovedIn8Warning now generate errors instead of warning messages by default.

The affected features will be effectively removed in pytest 8.1, so please consult the Deprecations and Removals section in the docs for directions on how to update existing code.

In the pytest 8.0.X series, it is possible to change the errors back into warnings as a stopgap measure by adding this to your pytest.ini file:
```
[pytest]
filterwarnings =
    ignore::pytest.PytestRemovedIn8Warning
```
But this will stop working when pytest 8.1 is released.

If you have concerns about the removal of a specific feature, please add a comment to #7363.

Version Compatibility¶

#11151: Dropped support for Python 3.7, which reached end-of-life on 2023-06-27.
pluggy>=1.3.0 is now required.

Collection Changes¶

In this version we’ve made several breaking changes to pytest’s collection phase, particularly around how filesystem directories and Python packages are collected, fixing deficiencies and allowing for cleanups and improvements to pytest’s internals. A deprecation period for these changes was not possible.

#7777: Files and directories are now collected in alphabetical order jointly, unless changed by a plugin. Previously, files were collected before directories. See below for an example.
#8976: Running pytest pkg/__init__.py now collects the pkg/__init__.py file (module) only. Previously, it collected the entire pkg package, including other test files in the directory, but excluding tests in the __init__.py file itself (unless python_files was changed to allow __init__.py file).

To collect the entire package, specify just the directory: pytest pkg.
#11137: pytest.Package is no longer a pytest.Module or pytest.File.

The Package collector node designates a Python package, that is, a directory with an __init__.py file. Previously Package was a subtype of pytest.Module (which represents a single Python module), the module being the __init__.py file. This has been deemed a design mistake (see #11137 and #7777 for details).

The path property of Package nodes now points to the package directory instead of the __init__.py file.

Note that a Module node for __init__.py (which is not a Package) may still exist, if it is picked up during collection (e.g. if you configured python_files to include __init__.py files).
#7777: Added a new pytest.Directory base collection node, which all collector nodes for filesystem directories are expected to subclass. This is analogous to the existing pytest.File for file nodes.

Changed pytest.Package to be a subclass of pytest.Directory. A Package represents a filesystem directory which is a Python package, i.e. contains an __init__.py file.

pytest.Package now only collects files in its own directory; previously it collected recursively. Sub-directories are collected as their own collector nodes, which then collect themselves, thus creating a collection tree which mirrors the filesystem hierarchy.

Added a new pytest.Dir concrete collection node, a subclass of pytest.Directory. This node represents a filesystem directory, which is not a pytest.Package, that is, does not contain an __init__.py file. Similarly to Package, it only collects the files in its own directory.

pytest.Session now only collects the initial arguments, without recursing into directories. This work is now done by the recursive expansion process of directory collector nodes.

session.name is now ""; previously it was the rootdir directory name. This matches session.nodeid which has always been "".

The collection tree now contains directories/packages up to the rootdir, for initial arguments that are found within the rootdir. For files outside the rootdir, only the immediate directory/package is collected – note however that collecting from outside the rootdir is discouraged.

As an example, given the following filesystem tree:
```
myroot/
    pytest.ini
    top/
    ├── aaa
    │   └── test_aaa.py
    ├── test_a.py
    ├── test_b
    │   ├── __init__.py
    │   └── test_b.py
    ├── test_c.py
    └── zzz
        ├── __init__.py
        └── test_zzz.py
```
the collection tree, as shown by pytest --collect-only top/ but with the otherwise-hidden Session node added for clarity, is now the following:
```
<Session>
  <Dir myroot>
    <Dir top>
      <Dir aaa>
        <Module test_aaa.py>
          <Function test_it>
      <Module test_a.py>
        <Function test_it>
      <Package test_b>
        <Module test_b.py>
          <Function test_it>
      <Module test_c.py>
        <Function test_it>
      <Package zzz>
        <Module test_zzz.py>
          <Function test_it>
```
Previously, it was:
```
<Session>
  <Module top/test_a.py>
    <Function test_it>
  <Module top/test_c.py>
    <Function test_it>
  <Module top/aaa/test_aaa.py>
    <Function test_it>
  <Package test_b>
    <Module test_b.py>
      <Function test_it>
  <Package zzz>
    <Module test_zzz.py>
      <Function test_it>
```
Code/plugins which rely on a specific shape of the collection tree might need to update.
#11676: The classes Node, Collector, Item, File, FSCollector are now marked abstract (see abc).

We do not expect this change to affect users and plugin authors, it will only cause errors when the code is already wrong or problematic.

Other breaking changes¶

These are breaking changes where deprecation was not possible.

#11282: Sanitized the handling of the default parameter when defining configuration options.

Previously if default was not supplied for parser.addini and the configuration option value was not defined in a test session, then calls to config.getini returned an empty list or an empty string depending on whether type was supplied or not respectively, which is clearly incorrect. Also, None was not honored even if default=None was used explicitly while defining the option.

Now the behavior of parser.addini is as follows:
- If default is NOT passed but type is provided, then a type-specific default will be returned. For example type=bool will return False, type=str will return "", etc.
- If default=None is passed and the option is not defined in a test session, then None will be returned, regardless of the type.
- If neither default nor type are provided, assume type=str and return "" as default (this is as per previous behavior).
The team decided to not introduce a deprecation period for this change, as doing so would be complicated both in terms of communicating this to the community as well as implementing it, and also because the team believes this change should not break existing plugins except in rare cases.
#11667: pytest’s setup.py file is removed. If you relied on this file, e.g. to install pytest using setup.py install, please see Why you shouldn’t invoke setup.py directly for alternatives.
#9288: warns() now re-emits unmatched warnings when the context closes – previously it would consume all warnings, hiding those that were not matched by the function.

While this is a new feature, we announce it as a breaking change because many test suites are configured to error-out on warnings, and will therefore fail on the newly-re-emitted warnings.
The internal FixtureManager.getfixtureclosure method has changed. Plugins which use this method or which subclass FixtureManager and overwrite that method will need to adapt to the change.

Deprecations¶

#10465: Test functions returning a value other than None will now issue a pytest.PytestWarning instead of pytest.PytestRemovedIn8Warning, meaning this will stay a warning instead of becoming an error in the future.
#3664: Applying a mark to a fixture function now issues a warning: marks in fixtures never had any effect, but it is a common user error to apply a mark to a fixture (for example usefixtures) and expect it to work.

This will become an error in pytest 9.0.

Features and Improvements¶

Improved Diffs¶

These changes improve the diffs that pytest prints when an assertion fails. Note that syntax highlighting requires the pygments package.

#11520: The very verbose (-vv) diff output is now colored as a diff instead of a big chunk of red.

Python code in error reports is now syntax-highlighted as Python.

The sections in the error reports are now better separated.
#1531: The very verbose diff (-vv) for every standard library container type is improved. The indentation is now consistent and the markers are on their own separate lines, which should reduce the diffs shown to users.

Previously, the standard Python pretty printer was used to generate the output, which puts opening and closing markers on the same line as the first/last entry, in addition to not having consistent indentation.
#10617: Added more comprehensive set assertion rewrites for comparisons other than equality ==, with the following operations now providing better failure messages: !=, <=, >=, <, and >.

Separate Control For Assertion Verbosity¶

#11387: Added the new verbosity_assertions configuration option for fine-grained control of failed assertions verbosity.

If you’ve ever wished that pytest always show you full diffs, but without making everything else verbose, this is for you.

See Fine-grained verbosity for more details.

For plugin authors, config.get_verbosity can be used to retrieve the verbosity level for a specific verbosity type.

Additional Support For Exception Groups and `notes`¶

These changes improve pytest’s support for exception groups.

#10441: Added ExceptionInfo.group_contains(), an assertion helper that tests if an ExceptionGroup contains a matching exception.

See 匹配异常组 for an example.
#11227: Allow pytest.raises() match argument to match against PEP-678 <https://peps.python.org/pep-0678/> __notes__.

Custom Directory collectors¶

#7777: Added a new hook pytest_collect_directory, which is called by filesystem-traversing collector nodes, such as pytest.Session, pytest.Dir and pytest.Package, to create a collector node for a sub-directory. It is expected to return a subclass of pytest.Directory. This hook allows plugins to customize the collection of directories.

“New-style” Hook Wrappers¶

#11122: pytest now uses “new-style” hook wrappers internally, available since pluggy 1.2.0. See pluggy’s 1.2.0 changelog and the updated docs for details.

Plugins which want to use new-style wrappers can do so if they require pytest>=8.

Other Improvements¶

#11216: If a test is skipped from inside an xunit setup fixture, the test summary now shows the test location instead of the fixture location.
#11314: Logging to a file using the --log-file option will use --log-level, --log-format and --log-date-format as fallback if --log-file-level, --log-file-format and --log-file-date-format are not provided respectively.
#11610: Added the LogCaptureFixture.filtering() context manager which adds a given logging.Filter object to the caplog fixture.
#11447: pytest.deprecated_call() now also considers warnings of type FutureWarning.
#11600: Improved the documentation and type signature for pytest.mark.xfail’s condition param to use False as the default value.
#7469: FixtureDef is now exported as pytest.FixtureDef for typing purposes.
#11353: Added typing to PytestPluginManager.

Bug Fixes¶

#10701: pytest.WarningsRecorder.pop() will return the most-closely-matched warning in the list, rather than the first warning which is an instance of the requested type.
#11255: Fixed crash on parametrize(..., scope="package") without a package present.
#11277: Fixed a bug that when there are multiple fixtures for an indirect parameter, the scope of the highest-scope fixture is picked for the parameter set, instead of that of the one with the narrowest scope.
#11456: Parametrized tests now really do ensure that the ids given to each input are unique - for example, a, a, a0 now results in a1, a2, a0 instead of the previous (buggy) a0, a1, a0. This necessarily means changing nodeids where these were previously colliding, and for readability adds an underscore when non-unique ids end in a number.
#11563: Fixed a crash when using an empty string for the same parametrized value more than once.
#11712: Fixed handling NO_COLOR and FORCE_COLOR to ignore an empty value.
#9036: pytest.warns and similar functions now capture warnings when an exception is raised inside a with block.

Improved Documentation¶

#11011: Added a warning about modifying the root logger during tests when using caplog.
#11065: Use pytestconfig instead of request.config in cache example to be consistent with the API documentation.

Trivial/Internal Changes¶

#11208: The (internal) FixtureDef.cached_result type has changed. Now the third item cached_result[2], when set, is an exception instance instead of an exception triplet.
#11218: (This entry is meant to assist plugins which access private pytest internals to instantiate FixtureRequest objects.)

FixtureRequest is now an abstract class which can’t be instantiated directly. A new concrete TopRequest subclass of FixtureRequest has been added for the request fixture in test functions, as counterpart to the existing SubRequest subclass for the request fixture in fixture functions.
#11315: The pytester fixture now uses the monkeypatch fixture to manage the current working directory. If you use pytester in combination with monkeypatch.undo(), the CWD might get restored. Use monkeypatch.context() instead.
#11333: Corrected the spelling of Config.ArgsSource.INVOCATION_DIR. The previous spelling INCOVATION_DIR remains as an alias.
#11638: Fixed the selftests to pass correctly if FORCE_COLOR, NO_COLOR or PY_COLORS is set in the calling environment.

pytest 7.4.4 (2023-12-31)¶

Bug Fixes¶

#11140: Fix non-string constants at the top of file being detected as docstrings on Python>=3.8.
#11572: Handle an edge case where sys.stderr and sys.__stderr__ might already be closed when 故障处理 is tearing down.
#11710: Fixed tracebacks from collection errors not getting pruned.
#7966: Removed unhelpful error message from assertion rewrite mechanism when exceptions are raised in __iter__ methods. Now they are treated un-iterable instead.

Improved Documentation¶

#11091: Updated documentation to refer to hyphenated options: replaced --junitxml with --junit-xml and --collectonly with --collect-only.

pytest 7.4.3 (2023-10-24)¶

Bug Fixes¶

#10447: Markers are now considered in the reverse mro order to ensure base class markers are considered first – this resolves a regression.
#11239: Fixed := in asserts impacting unrelated test cases.
#11439: Handled an edge case where sys.stderr might already be closed when 故障处理 is tearing down.

pytest 7.4.2 (2023-09-07)¶

Bug Fixes¶

#11237: Fix doctest collection of functools.cached_property objects.
#11306: Fixed bug using --importmode=importlib which would cause package __init__.py files to be imported more than once in some cases.
#11367: Fixed bug where user_properties where not being saved in the JUnit XML file if a fixture failed during teardown.
#11394: Fixed crash when parsing long command line arguments that might be interpreted as files.

Improved Documentation¶

#11391: Improved disclaimer on pytest plugin reference page to better indicate this is an automated, non-curated listing.

pytest 7.4.1 (2023-09-02)¶

Bug Fixes¶

#10337: Fixed bug where fake intermediate modules generated by --import-mode=importlib would not include the child modules as attributes of the parent modules.
#10702: Fixed error assertion handling in pytest.approx() when None is an expected or received value when comparing dictionaries.
#10811: Fixed issue when using --import-mode=importlib together with --doctest-modules that caused modules to be imported more than once, causing problems with modules that have import side effects.

pytest 7.4.0 (2023-06-23)¶

Features¶

#10901: Added ExceptionInfo.from_exception(), a simpler way to create an ExceptionInfo from an exception. This can replace ExceptionInfo.from_exc_info() for most uses.

Improvements¶

#10872: Update test log report annotation to named tuple and fixed inconsistency in docs for pytest_report_teststatus hook.
#10907: When an exception traceback to be displayed is completely filtered out (by mechanisms such as __tracebackhide__, internal frames, and similar), now only the exception string and the following message are shown:

“All traceback entries are hidden. Pass --full-trace to see hidden and internal frames.”.

Previously, the last frame of the traceback was shown, even though it was hidden.
#10940: Improved verbose output (-vv) of skip and xfail reasons by performing text wrapping while leaving a clear margin for progress output.

Added TerminalReporter.wrap_write() as a helper for that.
#10991: Added handling of %f directive to print microseconds in log format options, such as log-date-format.
#11005: Added the underlying exception to the cache provider’s path creation and write warning messages.
#11013: Added warning when testpaths is set, but paths are not found by glob. In this case, pytest will fall back to searching from the current directory.
#11043: When --confcutdir is not specified, and there is no config file present, the conftest cutoff directory (--confcutdir) is now set to the rootdir. Previously in such cases, conftest.py files would be probed all the way to the root directory of the filesystem. If you are badly affected by this change, consider adding an empty config file to your desired cutoff directory, or explicitly set --confcutdir.
#11081: The norecursedirs check is now performed in a pytest_ignore_collect implementation, so plugins can affect it.

If after updating to this version you see that your norecursedirs setting is not being respected, it means that a conftest or a plugin you use has a bad pytest_ignore_collect implementation. Most likely, your hook returns False for paths it does not want to ignore, which ends the processing and doesn’t allow other plugins, including pytest itself, to ignore the path. The fix is to return None instead of False for paths your hook doesn’t want to ignore.
#8711: caplog.set_level() and caplog.at_level() will temporarily enable the requested level if level was disabled globally via logging.disable(LEVEL).

Bug Fixes¶

#10831: Terminal Reporting: Fixed bug when running in --tb=line mode where pytest.fail(pytrace=False) tests report None.
#11068: Fixed the --last-failed whole-file skipping functionality (“skipped N files”) for non-python test files.
#11104: Fixed a regression in pytest 7.3.2 which caused to testpaths to be considered for loading initial conftests, even when it was not utilized (e.g. when explicit paths were given on the command line). Now the testpaths are only considered when they are in use.
#1904: Fixed traceback entries hidden with __tracebackhide__ = True still being shown for chained exceptions (parts after “… the above exception …” message).
#7781: Fix writing non-encodable text to log file when using --debug.

Improved Documentation¶

#9146: Improved documentation for caplog.set_level().

Trivial/Internal Changes¶

#11031: Enhanced the CLI flag for -c to now include --config-file to make it clear that this flag applies to the usage of a custom config file.

pytest 7.3.2 (2023-06-10)¶

Bug Fixes¶

#10169: Fix bug where very long option names could cause pytest to break with OSError: [Errno 36] File name too long on some systems.
#10894: Support for Python 3.12 (beta at the time of writing).
#10987: testpaths is now honored to load root conftests.
#10999: The monkeypatch setitem/delitem type annotations now allow TypedDict arguments.
#11028: Fixed bug in assertion rewriting where a variable assigned with the walrus operator could not be used later in a function call.
#11054: Fixed --last-failed’s “(skipped N files)” functionality for files inside of packages (directories with __init__.py files).

pytest 7.3.1 (2023-04-14)¶

Improvements¶

#10875: Python 3.12 support: fixed RuntimeError: TestResult has no addDuration method when running unittest tests.
#10890: Python 3.12 support: fixed shutil.rmtree(onerror=...) deprecation warning when using tmp_path.

Bug Fixes¶

#10896: Fixed performance regression related to tmp_path and the new tmp_path_retention_policy option.
#10903: Fix crash INTERNALERROR IndexError: list index out of range which happens when displaying an exception where all entries are hidden. This reverts the change “Correctly handle __tracebackhide__ for chained exceptions.” introduced in version 7.3.0.

pytest 7.3.0 (2023-04-08)¶

Features¶

#10525: Test methods decorated with @classmethod can now be discovered as tests, following the same rules as normal methods. This fills the gap that static methods were discoverable as tests but not class methods.
#10755: console_output_style now supports progress-even-when-capture-no to force the use of the progress output even when capture is disabled. This is useful in large test suites where capture may have significant performance impact.
#7431: --log-disable CLI option added to disable individual loggers.
#8141: Added tmp_path_retention_count and tmp_path_retention_policy configuration options to control how directories created by the tmp_path fixture are kept.

Improvements¶

#10226: If multiple errors are raised in teardown, we now re-raise an ExceptionGroup of them instead of discarding all but the last.
#10658: Allow -p arguments to include spaces (eg: -p no:logging instead of -pno:logging). Mostly useful in the addopts section of the configuration file.
#10710: Added start and stop timestamps to TestReport objects.
#10727: Split the report header for rootdir, config file and testpaths so each has its own line.
#10840: pytest should no longer crash on AST with pathological position attributes, for example testing AST produced by Hylang <https://github.com/hylang/hy>__.
#6267: The full output of a test is no longer truncated if the truncation message would be longer than the hidden text. The line number shown has also been fixed.

Bug Fixes¶

#10743: The assertion rewriting mechanism now works correctly when assertion expressions contain the walrus operator.
#10765: Fixed tmp_path fixture always raising OSError on emscripten platform due to missing os.getuid().
#1904: Correctly handle __tracebackhide__ for chained exceptions. NOTE: This change was reverted in version 7.3.1.

Improved Documentation¶

#10782: Fixed the minimal example in 良好的集成实践: pip install -e . requires a version entry in pyproject.toml to run successfully.

Trivial/Internal Changes¶

#10669: pytest no longer directly depends on the attrs package. While we at pytest all love the package dearly and would like to thank the attrs team for many years of cooperation and support, it makes sense for pytest to have as little external dependencies as possible, as this helps downstream projects. With that in mind, we have replaced the pytest’s limited internal usage to use the standard library’s dataclasses instead.

Nice diffs for attrs classes are still supported though.

pytest 7.2.2 (2023-03-03)¶

Bug Fixes¶

#10533: Fixed pytest.approx() handling of dictionaries containing one or more values of 0.0.
#10592: Fixed crash if --cache-show and --help are passed at the same time.
#10597: Fixed bug where a fixture method named teardown would be called as part of nose teardown stage.
#10626: Fixed crash if --fixtures and --help are passed at the same time.
#10660: Fixed pytest.raises() to return a ‘ContextManager’ so that type-checkers could narrow pytest.raises(...) if ... else nullcontext() down to ‘ContextManager’ rather than ‘object’.

Improved Documentation¶

#10690: Added CI and BUILD_NUMBER environment variables to the documentation.
#10721: Fixed entry-points declaration in the documentation example using Hatch.
#10753: Changed wording of the module level skip to be very explicit about not collecting tests and not executing the rest of the module.

pytest 7.2.1 (2023-01-13)¶

Bug Fixes¶

#10452: Fix ‘importlib.abc.TraversableResources’ deprecation warning in Python 3.12.
#10457: If a test is skipped from inside a fixture, the test summary now shows the test location instead of the fixture location.
#10506: Fix bug where sometimes pytest would use the file system root directory as rootdir on Windows.
#10607: Fix a race condition when creating junitxml reports, which could occur when multiple instances of pytest execute in parallel.
#10641: Fix a race condition when creating or updating the stepwise plugin’s cache, which could occur when multiple xdist worker nodes try to simultaneously update the stepwise plugin’s cache.

pytest 7.2.0 (2022-10-23)¶

Deprecations¶

#10012: Update pytest.PytestUnhandledCoroutineWarning to a deprecation; it will raise an error in pytest 8.
#10396: pytest no longer depends on the py library. pytest provides a vendored copy of py.error and py.path modules but will use the py library if it is installed. If you need other py.* modules, continue to install the deprecated py library separately, otherwise it can usually be removed as a dependency.
#4562: Deprecate configuring hook specs/impls using attributes/marks.

Instead use pytest.hookimpl() and pytest.hookspec(). For more details, see the docs.
#9886: The functionality for running tests written for nose has been officially deprecated.

This includes:
- Plain setup and teardown functions and methods: this might catch users by surprise, as setup() and teardown() are not pytest idioms, but part of the nose support.
- Setup/teardown using the @with_setup decorator.
For more details, consult the deprecation docs.
#7337: A deprecation warning is now emitted if a test function returns something other than None. This prevents a common mistake among beginners that expect that returning a bool (for example return foo(a, b) == result) would cause a test to pass or fail, instead of using assert. The plan is to make returning non-None from tests an error in the future.

Features¶

#9897: Added shell-style wildcard support to testpaths.

Improvements¶

#10218: @pytest.mark.parametrize() (and similar functions) now accepts any Sequence[str] for the argument names, instead of just list[str] and tuple[str, ...].

(Note that str, which is itself a Sequence[str], is still treated as a comma-delimited name list, as before).
#10381: The --no-showlocals flag has been added. This can be passed directly to tests to override --showlocals declared through addopts.
#3426: Assertion failures with strings in NFC and NFD forms that normalize to the same string now have a dedicated error message detailing the issue, and their utf-8 representation is expressed instead.
#8508: Introduce multiline display for warning matching via pytest.warns() and enhance match comparison for pytest.ExceptionInfo.match() as returned by pytest.raises().
#8646: Improve pytest.raises(). Previously passing an empty tuple would give a confusing error. We now raise immediately with a more helpful message.
#9741: On Python 3.11, use the standard library’s tomllib to parse TOML.

tomli is no longer a dependency on Python 3.11.
#9742: Display assertion message without escaped newline characters with -vv.
#9823: Improved error message that is shown when no collector is found for a given file.
#9873: Some coloring has been added to the short test summary.
#9883: Normalize the help description of all command-line options.
#9920: Display full crash messages in short test summary info, when running in a CI environment.
#9987: Added support for hidden configuration file by allowing .pytest.ini as an alternative to pytest.ini.

Bug Fixes¶

#10150: sys.stdin now contains all expected methods of a file-like object when capture is enabled.
#10382: Do not break into pdb when raise unittest.SkipTest() appears top-level in a file.
#7792: Marks are now inherited according to the full MRO in test classes. Previously, if a test class inherited from two or more classes, only marks from the first super-class would apply.

When inheriting marks from super-classes, marks from the sub-classes are now ordered before marks from the super-classes, in MRO order. Previously it was the reverse.

When inheriting marks from super-classes, the pytestmark attribute of the sub-class now only contains the marks directly applied to it. Previously, it also contained marks from its super-classes. Please note that this attribute should not normally be accessed directly; use Node.iter_markers instead.
#9159: Showing inner exceptions by forcing native display in ExceptionGroups even when using display options other than --tb=native. A temporary step before full implementation of pytest-native display for inner exceptions in ExceptionGroups.
#9877: Ensure caplog.get_records(when) returns current/correct data after invoking caplog.clear().

Improved Documentation¶

#10344: Update information on writing plugins to use pyproject.toml instead of setup.py.
#9248: The documentation is now built using Sphinx 5.x (up from 3.x previously).
#9291: Update documentation on how pytest.warns() affects DeprecationWarning.

Trivial/Internal Changes¶

#10313: Made _pytest.doctest.DoctestItem export pytest.DoctestItem for type check and runtime purposes. Made _pytest.doctest use internal APIs to avoid circular imports.
#9906: Made _pytest.compat re-export importlib_metadata in the eyes of type checkers.
#9910: Fix default encoding warning (EncodingWarning) in cacheprovider
#9984: Improve the error message when we attempt to access a fixture that has been torn down. Add an additional sentence to the docstring explaining when it’s not a good idea to call getfixturevalue.

pytest 7.1.3 (2022-08-31)¶

Bug Fixes¶

#10060: When running with --pdb, TestCase.tearDown is no longer called for tests when the class has been skipped via unittest.skip or pytest.mark.skip.
#10190: Invalid XML characters in setup or teardown error messages are now properly escaped for JUnit XML reports.
#10230: Ignore .py files created by pyproject.toml-based editable builds introduced in pip 21.3.
#3396: Doctests now respect the --import-mode flag.
#9514: Type-annotate FixtureRequest.param as Any as a stop gap measure until #8073 is fixed.
#9791: Fixed a path handling code in rewrite.py that seems to work fine, but was incorrect and fails in some systems.
#9917: Fixed string representation for pytest.approx() when used to compare tuples.

Improved Documentation¶

#9937: Explicit note that tmpdir fixture is discouraged in favour of tmp_path.

Trivial/Internal Changes¶

#10114: Replace atomicwrites dependency on windows with os.replace.

pytest 7.1.2 (2022-04-23)¶

Bug Fixes¶

#9726: An unnecessary numpy import inside pytest.approx() was removed.
#9820: Fix comparison of dataclasses with InitVar.
#9869: Increase stacklevel for the NODE_CTOR_FSPATH_ARG deprecation to point to the user’s code, not pytest.
#9871: Fix a bizarre (and fortunately rare) bug where the temp_path fixture could raise an internal error while attempting to get the current user’s username.

pytest 7.1.1 (2022-03-17)¶

Bug Fixes¶

#9767: Fixed a regression in pytest 7.1.0 where some conftest.py files outside of the source tree (e.g. in the site-packages directory) were not picked up.

pytest 7.1.0 (2022-03-13)¶

Breaking Changes¶

#8838: As per our policy, the following features have been deprecated in the 6.X series and are now removed:
- pytest._fillfuncargs function.
- pytest_warning_captured hook - use pytest_warning_recorded instead.
- -k -foobar syntax - use -k 'not foobar' instead.
- -k foobar: syntax.
- pytest.collect module - import from pytest directly.
For more information consult Deprecations and Removals in the docs.
#9437: Dropped support for Python 3.6, which reached end-of-life at 2021-12-23.

Improvements¶

#5192: Fixed test output for some data types where -v would show less information.

Also, when showing diffs for sequences, -q would produce full diffs instead of the expected diff.
#9362: pytest now avoids specialized assert formatting when it is detected that the default __eq__ is overridden in attrs or dataclasses.
#9536: When -vv is given on command line, show skipping and xfail reasons in full instead of truncating them to fit the terminal width.
#9644: More information about the location of resources that led Python to raise ResourceWarning can now be obtained by enabling tracemalloc.

See 资源警告 for more information.
#9678: More types are now accepted in the ids argument to @pytest.mark.parametrize. Previously only str, float, int and bool were accepted; now bytes, complex, re.Pattern, Enum and anything with a __name__ are also accepted.
#9692: pytest.approx() now raises a TypeError when given an unordered sequence (such as set).

Note that this implies that custom classes which only implement __iter__ and __len__ are no longer supported as they don’t guarantee order.

Bug Fixes¶

#8242: The deprecation of raising unittest.SkipTest to skip collection of tests during the pytest collection phase is reverted - this is now a supported feature again.
#9493: Symbolic link components are no longer resolved in conftest paths. This means that if a conftest appears twice in collection tree, using symlinks, it will be executed twice. For example, given

tests/real/conftest.py tests/real/test_it.py tests/link -> tests/real

running pytest tests now imports the conftest twice, once as tests/real/conftest.py and once as tests/link/conftest.py. This is a fix to match a similar change made to test collection itself in pytest 6.0 (see #6523 for details).
#9626: Fixed count of selected tests on terminal collection summary when there were errors or skipped modules.

If there were errors or skipped modules on collection, pytest would mistakenly subtract those from the selected count.
#9645: Fixed regression where --import-mode=importlib used together with PYTHONPATH or pythonpath would cause import errors in test suites.
#9708: pytester now requests a monkeypatch fixture instead of creating one internally. This solves some issues with tests that involve pytest environment variables.
#9730: Malformed pyproject.toml files now produce a clearer error message.

pytest 7.0.1 (2022-02-11)¶

Bug Fixes¶

#9608: Fix invalid importing of importlib.readers in Python 3.9.
#9610: Restore UnitTestFunction.obj to return unbound rather than bound method. Fixes a crash during a failed teardown in unittest TestCases with non-default __init__. Regressed in pytest 7.0.0.
#9636: The pythonpath plugin was renamed to python_path. This avoids a conflict with the pytest-pythonpath plugin.
#9642: Fix running tests by id with :: in the parametrize portion.
#9643: Delay issuing a PytestWarning about diamond inheritance involving Item and Collector so it can be filtered using standard warning filters.

pytest 7.0.0 (2022-02-03)¶

(Please see the full set of changes for this release also in the 7.0.0rc1 notes below)

Deprecations¶

#9488: If custom subclasses of nodes like pytest.Item override the __init__ method, they should take **kwargs. See Constructors of custom Node subclasses should take **kwargs for details.

Note that a deprecation warning is only emitted when there is a conflict in the arguments pytest expected to pass. This deprecation was already part of pytest 7.0.0rc1 but wasn’t documented.

Bug Fixes¶

#9355: Fixed error message prints function decorators when using assert in Python 3.8 and above.
#9396: Ensure pytest.Config.inifile is available during the pytest_cmdline_main hook (regression during 7.0.0rc1).

Improved Documentation¶

#9404: Added extra documentation on alternatives to common misuses of pytest.warns(None) ahead of its deprecation.
#9505: Clarify where the configuration files are located. To avoid confusions documentation mentions that configuration file is located in the root of the repository.

Trivial/Internal Changes¶

#9521: Add test coverage to assertion rewrite path.

pytest 7.0.0rc1 (2021-12-06)¶

Breaking Changes¶

#7259: The Node.reportinfo() function first return value type has been expanded from py.path.local | str to os.PathLike[str] | str.

Most plugins which refer to reportinfo() only define it as part of a custom pytest.Item implementation. Since py.path.local is an os.PathLike[str], these plugins are unaffected.

Plugins and users which call reportinfo(), use the first return value and interact with it as a py.path.local, would need to adjust by calling py.path.local(fspath). Although preferably, avoid the legacy py.path.local and use pathlib.Path, or use item.location or item.path, instead.

Note: pytest was not able to provide a deprecation period for this change.
#8246: --version now writes version information to stdout rather than stderr.
#8733: Drop a workaround for pyreadline that made it work with --pdb.

The workaround was introduced in #1281 in 2015, however since then pyreadline seems to have gone unmaintained, is generating warnings, and will stop working on Python 3.10.
#9061: Using pytest.approx() in a boolean context now raises an error hinting at the proper usage.

It is apparently common for users to mistakenly use pytest.approx like this:
```
assert pytest.approx(actual, expected)
```
While the correct usage is:
```
assert actual == pytest.approx(expected)
```
The new error message helps catch those mistakes.
#9277: The pytest.Instance collector type has been removed. Importing pytest.Instance or _pytest.python.Instance returns a dummy type and emits a deprecation warning. See The pytest.Instance collector for details.
#9308: PytestRemovedIn7Warning deprecation warnings are now errors by default.

Following our plan to remove deprecated features with as little disruption as possible, all warnings of type PytestRemovedIn7Warning now generate errors instead of warning messages by default.

The affected features will be effectively removed in pytest 7.1, so please consult the Deprecations and Removals section in the docs for directions on how to update existing code.

In the pytest 7.0.X series, it is possible to change the errors back into warnings as a stopgap measure by adding this to your pytest.ini file:
```
[pytest]
filterwarnings =
    ignore::pytest.PytestRemovedIn7Warning
```
But this will stop working when pytest 7.1 is released.

If you have concerns about the removal of a specific feature, please add a comment to #9308.

Deprecations¶

#7259: py.path.local arguments for hooks have been deprecated. See the deprecation note for full details.

py.path.local arguments to Node constructors have been deprecated. See the deprecation note for full details.

Note

The name of the Node arguments and attributes (the new attribute being path) is the opposite of the situation for hooks (the old argument being path).

This is an unfortunate artifact due to historical reasons, which should be resolved in future versions as we slowly get rid of the py dependency (see #9283 for a longer discussion).
#7469: Directly constructing the following classes is now deprecated:
- _pytest.mark.structures.Mark
- _pytest.mark.structures.MarkDecorator
- _pytest.mark.structures.MarkGenerator
- _pytest.python.Metafunc
- _pytest.runner.CallInfo
- _pytest._code.ExceptionInfo
- _pytest.config.argparsing.Parser
- _pytest.config.argparsing.OptionGroup
- _pytest.pytester.HookRecorder
These constructors have always been considered private, but now issue a deprecation warning, which may become a hard error in pytest 8.
#8242: Raising unittest.SkipTest to skip collection of tests during the pytest collection phase is deprecated. Use pytest.skip() instead.

Note: This deprecation only relates to using unittest.SkipTest during test collection. You are probably not doing that. Ordinary usage of unittest.SkipTest / unittest.TestCase.skipTest() / unittest.skip() in unittest test cases is fully supported.

Note

This deprecation has been reverted in pytest 7.1.0.
#8315: Several behaviors of Parser.addoption are now scheduled for removal in pytest 8 (deprecated since pytest 2.4.0):
- parser.addoption(..., help=".. %default ..") - use %(default)s instead.
- parser.addoption(..., type="int/string/float/complex") - use type=int etc. instead.
#8447: Defining a custom pytest node type which is both an Item and a Collector (e.g. File) now issues a warning. It was never sanely supported and triggers hard to debug errors.

See the deprecation note for full details.
#8592: pytest_cmdline_preparse has been officially deprecated. It will be removed in a future release. Use pytest_load_initial_conftests instead.

See the deprecation note for full details.
#8645: pytest.warns(None) is now deprecated because many people used it to mean “this code does not emit warnings”, but it actually had the effect of checking that the code emits at least one warning of any type - like pytest.warns() or pytest.warns(Warning).
#8948: pytest.skip(msg=...), pytest.fail(msg=...) and pytest.exit(msg=...) signatures now accept a reason argument instead of msg. Using msg still works, but is deprecated and will be removed in a future release.

This was changed for consistency with pytest.mark.skip and pytest.mark.xfail which both accept reason as an argument.
#8174: The following changes have been made to types reachable through pytest.ExceptionInfo.traceback:
- The path property of _pytest.code.Code returns Path instead of py.path.local.
- The path property of _pytest.code.TracebackEntry returns Path instead of py.path.local.
There was no deprecation period for this change (sorry!).

Features¶

#5196: Tests are now ordered by definition order in more cases.

In a class hierarchy, tests from base classes are now consistently ordered before tests defined on their subclasses (reverse MRO order).
#7132: Added two environment variables PYTEST_THEME and PYTEST_THEME_MODE to let the users customize the pygments theme used.
#7259: Added cache.mkdir(), which is similar to the existing cache.makedir(), but returns a pathlib.Path instead of a legacy py.path.local.

Added a paths type to parser.addini(), as in parser.addini("mypaths", "my paths", type="paths"), which is similar to the existing pathlist, but returns a list of pathlib.Path instead of legacy py.path.local.
#7469: The types of objects used in pytest’s API are now exported so they may be used in type annotations.

The newly-exported types are:
- pytest.Config for Config.
- pytest.Mark for marks.
- pytest.MarkDecorator for mark decorators.
- pytest.MarkGenerator for the pytest.mark singleton.
- pytest.Metafunc for the metafunc argument to the pytest_generate_tests hook.
- pytest.CallInfo for the CallInfo type passed to various hooks.
- pytest.PytestPluginManager for PytestPluginManager.
- pytest.ExceptionInfo for the ExceptionInfo type returned from pytest.raises() and passed to various hooks.
- pytest.Parser for the Parser type passed to the pytest_addoption hook.
- pytest.OptionGroup for the OptionGroup type returned from the parser.addgroup method.
- pytest.HookRecorder for the HookRecorder type returned from Pytester.
- pytest.RecordedHookCall for the RecordedHookCall type returned from HookRecorder.
- pytest.RunResult for the RunResult type returned from Pytester.
- pytest.LineMatcher for the LineMatcher type used in RunResult and others.
- pytest.TestReport for the TestReport type used in various hooks.
- pytest.CollectReport for the CollectReport type used in various hooks.
Constructing most of them directly is not supported; they are only meant for use in type annotations. Doing so will emit a deprecation warning, and may become a hard-error in pytest 8.0.

Subclassing them is also not supported. This is not currently enforced at runtime, but is detected by type-checkers such as mypy.
#7856: –import-mode=importlib now works with features that depend on modules being on sys.modules, such as pickle and dataclasses.
#8144: The following hooks now receive an additional pathlib.Path argument, equivalent to an existing py.path.local argument:
- pytest_ignore_collect - The collection_path parameter (equivalent to existing path parameter).
- pytest_collect_file - The file_path parameter (equivalent to existing path parameter).
- pytest_pycollect_makemodule - The module_path parameter (equivalent to existing path parameter).
- pytest_report_header - The start_path parameter (equivalent to existing startdir parameter).
- pytest_report_collectionfinish - The start_path parameter (equivalent to existing startdir parameter).
Note

The name of the Node arguments and attributes (the new attribute being path) is the opposite of the situation for hooks (the old argument being path).

This is an unfortunate artifact due to historical reasons, which should be resolved in future versions as we slowly get rid of the py dependency (see #9283 for a longer discussion).
#8251: Implement Node.path as a pathlib.Path. Both the old fspath and this new attribute gets set no matter whether path or fspath (deprecated) is passed to the constructor. It is a replacement for the fspath attribute (which represents the same path as py.path.local). While fspath is not deprecated yet due to the ongoing migration of methods like reportinfo(), we expect to deprecate it in a future release.

Note

The name of the Node arguments and attributes (the new attribute being path) is the opposite of the situation for hooks (the old argument being path).

This is an unfortunate artifact due to historical reasons, which should be resolved in future versions as we slowly get rid of the py dependency (see #9283 for a longer discussion).
#8421: pytest.approx() now works on Decimal within mappings/dicts and sequences/lists.
#8606: pytest invocations with --fixtures-per-test and --fixtures have been enriched with:
- Fixture location path printed with the fixture name.
- First section of the fixture’s docstring printed under the fixture name.
- Whole of fixture’s docstring printed under the fixture name using --verbose option.
#8761: New pytest.version_tuple attribute, which makes it simpler for users to do something depending on the pytest version (such as declaring hooks which are introduced in later versions).
#8789: Switch TOML parser from toml to tomli for TOML v1.0.0 support in pyproject.toml.
#8920: Added pytest.Stash, a facility for plugins to store their data on Config and Nodes in a type-safe and conflict-free manner. See 跨钩子函数存储项目数据 for details.
#8953: RunResult method assert_outcomes() now accepts a warnings argument to assert the total number of warnings captured.
#8954: --debug flag now accepts a str file to route debug logs into, remains defaulted to pytestdebug.log.
#9023: Full diffs are now always shown for equality assertions of iterables when CI or BUILD_NUMBER is found in the environment, even when -v isn’t used.
#9113: RunResult method assert_outcomes() now accepts a deselected argument to assert the total number of deselected tests.
#9114: Added pythonpath setting that adds listed paths to sys.path for the duration of the test session. If you currently use the pytest-pythonpath or pytest-srcpaths plugins, you should be able to replace them with built-in pythonpath setting.

Improvements¶

#7480: A deprecation scheduled to be removed in a major version X (e.g. pytest 7, 8, 9, …) now uses warning category PytestRemovedInXWarning, a subclass of PytestDeprecationWarning, instead of PytestDeprecationWarning directly.

See 向后兼容政策 for more details.
#7864: Improved error messages when parsing warning filters.

Previously pytest would show an internal traceback, which besides being ugly sometimes would hide the cause of the problem (for example an ImportError while importing a specific warning type).

#8335: Improved pytest.approx() assertion messages for sequences of numbers.

The assertion messages now dumps a table with the index and the error of each diff. Example:

>       assert [1, 2, 3, 4] == pytest.approx([1, 3, 3, 5])
E       assert comparison failed for 2 values:
E         Index | Obtained | Expected
E         1     | 2        | 3 +- 3.0e-06
E         3     | 4        | 5 +- 5.0e-06

#8403: By default, pytest will truncate long strings in assert errors so they don’t clutter the output too much, currently at 240 characters by default.

However, in some cases the longer output helps, or is even crucial, to diagnose a failure. Using -v will now increase the truncation threshold to 2400 characters, and -vv or higher will disable truncation entirely.
#8509: Fixed issue where unittest.TestCase.setUpClass() is not called when a test has / in its name since pytest 6.2.0.

This refers to the path part in pytest node IDs, e.g. TestClass::test_it in the node ID tests/test_file.py::TestClass::test_it.

Now, instead of assuming that the test name does not contain /, it is assumed that test path does not contain ::. We plan to hopefully make both of these work in the future.

#8803: It is now possible to add colors to custom log levels on cli log.

By using add_color_level from a pytest_configure hook, colors can be added:

logging_plugin = config.pluginmanager.get_plugin('logging-plugin')
logging_plugin.log_cli_handler.formatter.add_color_level(logging.INFO, 'cyan')
logging_plugin.log_cli_handler.formatter.add_color_level(logging.SPAM, 'blue')

See 自定义颜色 for more information.

#8822: When showing fixture paths in --fixtures or --fixtures-by-test, fixtures coming from pytest itself now display an elided path, rather than the full path to the file in the site-packages directory.
#8898: Complex numbers are now treated like floats and integers when generating parameterization IDs.
#9062: --stepwise-skip now implicitly enables --stepwise and can be used on its own.
#9205: pytest.Cache.set() now preserves key order when saving dicts.

Bug Fixes¶

#7124: Fixed an issue where __main__.py would raise an ImportError when --doctest-modules was provided.
#8061: Fixed failing staticmethod test cases if they are inherited from a parent test class.
#8192: testdir.makefile now silently accepts values which don’t start with . to maintain backward compatibility with older pytest versions.

pytester.makefile now issues a clearer error if the . is missing in the ext argument.
#8258: Fixed issue where pytest’s faulthandler support would not dump traceback on crashes if the faulthandler module was already enabled during pytest startup (using python -X dev -m pytest for example).
#8317: Fixed an issue where illegal directory characters derived from getpass.getuser() raised an OSError.
#8367: Fix Class.from_parent so it forwards extra keyword arguments to the constructor.
#8377: The test selection options pytest -k and pytest -m now support matching names containing forward slash (/) characters.
#8384: The @pytest.mark.skip decorator now correctly handles its arguments. When the reason argument is accidentally given both positional and as a keyword (e.g. because it was confused with skipif), a TypeError now occurs. Before, such tests were silently skipped, and the positional argument ignored. Additionally, reason is now documented correctly as positional or keyword (rather than keyword-only).
#8394: Use private names for internal fixtures that handle classic setup/teardown so that they don’t show up with the default --fixtures invocation (but they still show up with --fixtures -v).
#8456: The required_plugins config option now works correctly when pre-releases of plugins are installed, rather than falsely claiming that those plugins aren’t installed at all.
#8464: -c <config file> now also properly defines rootdir as the directory that contains <config file>.
#8503: pytest.MonkeyPatch.syspath_prepend() no longer fails when setuptools is not installed. It now only calls pkg_resources.fixup_namespace_packages if pkg_resources was previously imported, because it is not needed otherwise.
#8548: Introduce fix to handle precision width in log-cli-format in turn to fix output coloring for certain formats.
#8796: Fixed internal error when skipping doctests.
#8983: The test selection options pytest -k and pytest -m now support matching names containing backslash (\) characters. Backslashes are treated literally, not as escape characters (the values being matched against are already escaped).
#8990: Fix pytest -vv crashing with an internal exception AttributeError: 'str' object has no attribute 'relative_to' in some cases.
#9077: Fixed confusing error message when request.fspath / request.path was accessed from a session-scoped fixture.
#9131: Fixed the URL used by --pastebin to use bpa.st.
#9163: The end line number and end column offset are now properly set for rewritten assert statements.
#9169: Support for the files API from importlib.resources within rewritten files.
#9272: The nose compatibility module-level fixtures setup() and teardown() are now only called once per module, instead of for each test function. They are now called even if object-level setup/teardown is defined.

Improved Documentation¶

#4320: Improved docs for pytester.copy_example.
#5105: Add automatically generated Pytest 插件列表. The list is updated on a periodic schedule.
#8337: Recommend numpy.testing module on pytest.approx() documentation.
#8655: Help text for --pdbcls more accurately reflects the option’s behavior.
#9210: Remove incorrect docs about confcutdir being a configuration option: it can only be set through the --confcutdir command-line option.
#9242: Upgrade readthedocs configuration to use a newer Ubuntu version <https://blog.readthedocs.com/new-build-specification/>`__ with better unicode support for PDF docs.
#9341: Various methods commonly used for 使用非 Python 测试 are now correctly documented in the reference docs. They were undocumented previously.

Trivial/Internal Changes¶

#8133: Migrate to setuptools_scm 6.x to use SETUPTOOLS_SCM_PRETEND_VERSION_FOR_PYTEST for more robust release tooling.
#8174: The following changes have been made to internal pytest types/functions:
- The _pytest.code.getfslineno() function returns Path instead of py.path.local.
- The _pytest.python.path_matches_patterns() function takes Path instead of py.path.local.
- The _pytest._code.Traceback.cut() function accepts any os.PathLike[str], not just py.path.local.
#8248: Internal Restructure: let python.PyObjMixin inherit from nodes.Node to carry over typing information.
#8432: Improve error message when pytest.skip() is used at module level without passing allow_module_level=True.
#8818: Ensure regendoc opts out of TOX_ENV cachedir selection to ensure independent example test runs.
#8913: The private CallSpec2._arg2scopenum attribute has been removed after an internal refactoring.
#8967: pytest_assertion_pass is no longer considered experimental and future changes to it will be considered more carefully.
#9202: Add github action to upload coverage report to codecov instead of bash uploader.
#9225: Changed the command used to create sdist and wheel artifacts: using the build package instead of setup.py.
#9351: Correct minor typos in doc/en/example/special.rst.

pytest 6.2.5 (2021-08-29)¶

Trivial/Internal Changes¶

#8494: Python 3.10 is now supported.
#9040: Enable compatibility with pluggy 1.0 or later.

pytest 6.2.4 (2021-05-04)¶

Bug Fixes¶

#8539: Fixed assertion rewriting on Python 3.10.

pytest 6.2.3 (2021-04-03)¶

Bug Fixes¶

#8414: pytest used to create directories under /tmp with world-readable permissions. This means that any user in the system was able to read information written by tests in temporary directories (such as those created by the tmp_path/tmpdir fixture). Now the directories are created with private permissions.

pytest used to silently use a preexisting /tmp/pytest-of-<username> directory, even if owned by another user. This means another user could pre-create such a directory and gain control of another user’s temporary directory. Now such a condition results in an error.

pytest 6.2.2 (2021-01-25)¶

Bug Fixes¶

#8152: Fixed “(<Skipped instance>)” being shown as a skip reason in the verbose test summary line when the reason is empty.
#8249: Fix the faulthandler plugin for occasions when running with twisted.logger and using pytest --capture=no.

pytest 6.2.1 (2020-12-15)¶

Bug Fixes¶

#7678: Fixed bug where ImportPathMismatchError would be raised for files compiled in the host and loaded later from an UNC mounted path (Windows).
#8132: Fixed regression in approx: in 6.2.0 approx no longer raises TypeError when dealing with non-numeric types, falling back to normal comparison. Before 6.2.0, array types like tf.DeviceArray fell through to the scalar case, and happened to compare correctly to a scalar if they had only one element. After 6.2.0, these types began failing, because they inherited neither from standard Python number hierarchy nor from numpy.ndarray.

approx now converts arguments to numpy.ndarray if they expose the array protocol and are not scalars. This treats array-like objects like numpy arrays, regardless of size.

pytest 6.2.0 (2020-12-12)¶

Breaking Changes¶

#7808: pytest now supports python3.6+ only.

Deprecations¶

#7469: Directly constructing/calling the following classes/functions is now deprecated:
- _pytest.cacheprovider.Cache
- _pytest.cacheprovider.Cache.for_config()
- _pytest.cacheprovider.Cache.clear_cache()
- _pytest.cacheprovider.Cache.cache_dir_from_config()
- _pytest.capture.CaptureFixture
- _pytest.fixtures.FixtureRequest
- _pytest.fixtures.SubRequest
- _pytest.logging.LogCaptureFixture
- _pytest.pytester.Pytester
- _pytest.pytester.Testdir
- _pytest.recwarn.WarningsRecorder
- _pytest.recwarn.WarningsChecker
- _pytest.tmpdir.TempPathFactory
- _pytest.tmpdir.TempdirFactory
These have always been considered private, but now issue a deprecation warning, which may become a hard error in pytest 8.0.0.
#7530: The --strict command-line option has been deprecated, use --strict-markers instead.

We have plans to maybe in the future to reintroduce --strict and make it an encompassing flag for all strictness related options (--strict-markers and --strict-config at the moment, more might be introduced in the future).
#7988: The @pytest.yield_fixture decorator/function is now deprecated. Use pytest.fixture() instead.

yield_fixture has been an alias for fixture for a very long time, so can be search/replaced safely.

Features¶

#5299: pytest now warns about unraisable exceptions and unhandled thread exceptions that occur in tests on Python>=3.8. See 关于无法引发的异常和未处理的线程异常的警告 for more information.
#7425: New pytester fixture, which is identical to testdir but its methods return pathlib.Path when appropriate instead of py.path.local.

This is part of the movement to use pathlib.Path objects internally, in order to remove the dependency to py in the future.

Internally, the old pytest.Testdir is now a thin wrapper around Pytester, preserving the old interface.
#7695: A new hook was added, pytest_markeval_namespace which should return a dictionary. This dictionary will be used to augment the “global” variables available to evaluate skipif/xfail/xpass markers.

Pseudo example

conftest.py:
```
def pytest_markeval_namespace():
    return {"color": "red"}
```
test_func.py:
```
@pytest.mark.skipif("color == 'blue'", reason="Color is not red")
def test_func():
    assert False
```
#8006: It is now possible to construct a MonkeyPatch object directly as pytest.MonkeyPatch(), in cases when the monkeypatch fixture cannot be used. Previously some users imported it from the private _pytest.monkeypatch.MonkeyPatch namespace.

Additionally, MonkeyPatch.context is now a classmethod, and can be used as with MonkeyPatch.context() as mp: .... This is the recommended way to use MonkeyPatch directly, since unlike the monkeypatch fixture, an instance created directly is not undo()-ed automatically.

Improvements¶

#1265: Added an __str__ implementation to the LineMatcher class which is returned from pytester.run_pytest().stdout and similar. It returns the entire output, like the existing str() method.
#2044: Verbose mode now shows the reason that a test was skipped in the test’s terminal line after the “SKIPPED”, “XFAIL” or “XPASS”.
#7469 The types of builtin pytest fixtures are now exported so they may be used in type annotations of test functions. The newly-exported types are:
- pytest.FixtureRequest for the request fixture.
- pytest.Cache for the cache fixture.
- pytest.CaptureFixture[str] for the capfd and capsys fixtures.
- pytest.CaptureFixture[bytes] for the capfdbinary and capsysbinary fixtures.
- pytest.LogCaptureFixture for the caplog fixture.
- pytest.Pytester for the pytester fixture.
- pytest.Testdir for the testdir fixture.
- pytest.TempdirFactory for the tmpdir_factory fixture.
- pytest.TempPathFactory for the tmp_path_factory fixture.
- pytest.MonkeyPatch for the monkeypatch fixture.
- pytest.WarningsRecorder for the recwarn fixture.
Constructing them is not supported (except for MonkeyPatch); they are only meant for use in type annotations. Doing so will emit a deprecation warning, and may become a hard-error in pytest 8.0.

Subclassing them is also not supported. This is not currently enforced at runtime, but is detected by type-checkers such as mypy.
#7527: When a comparison between namedtuple instances of the same type fails, pytest now shows the differing field names (possibly nested) instead of their indexes.
#7615: Node.warn now permits any subclass of Warning, not just PytestWarning.
#7701: Improved reporting when using --collected-only. It will now show the number of collected tests in the summary stats.
#7710: Use strict equality comparison for non-numeric types in pytest.approx() instead of raising TypeError.

This was the undocumented behavior before 3.7, but is now officially a supported feature.
#7938: New --sw-skip argument which is a shorthand for --stepwise-skip.
#8023: Added 'node_modules' to default value for norecursedirs.
#8032: doClassCleanups (introduced in unittest in Python and 3.8) is now called appropriately.

Bug Fixes¶

#4824: Fixed quadratic behavior and improved performance of collection of items using autouse fixtures and xunit fixtures.
#7758: Fixed an issue where some files in packages are getting lost from --lf even though they contain tests that failed. Regressed in pytest 5.4.0.
#7911: Directories created by by tmp_path and tmpdir are now considered stale after 3 days without modification (previous value was 3 hours) to avoid deleting directories still in use in long running test suites.
#7913: Fixed a crash or hang in pytester.spawn when the readline module is involved.
#7951: Fixed handling of recursive symlinks when collecting tests.
#7981: Fixed symlinked directories not being followed during collection. Regressed in pytest 6.1.0.
#8016: Fixed only one doctest being collected when using pytest --doctest-modules path/to/an/__init__.py.

Improved Documentation¶

#7429: Add more information and use cases about skipping doctests.
#7780: Classes which should not be inherited from are now marked final class in the API reference.
#7872: _pytest.config.argparsing.Parser.addini() accepts explicit None and "string".
#7878: In pull request section, ask to commit after editing changelog and authors file.

Trivial/Internal Changes¶

#7802: The attrs dependency requirement is now >=19.2.0 instead of >=17.4.0.
#8014: .pyc files created by pytest’s assertion rewriting now conform to the newer PEP 552 format on Python>=3.7. (These files are internal and only interpreted by pytest itself.)

pytest 6.1.2 (2020-10-28)¶

Bug Fixes¶

#7758: Fixed an issue where some files in packages are getting lost from --lf even though they contain tests that failed. Regressed in pytest 5.4.0.
#7911: Directories created by tmpdir are now considered stale after 3 days without modification (previous value was 3 hours) to avoid deleting directories still in use in long running test suites.

Improved Documentation¶

#7815: Improve deprecation warning message for pytest._fillfuncargs().

pytest 6.1.1 (2020-10-03)¶

Bug Fixes¶

#7807: Fixed regression in pytest 6.1.0 causing incorrect rootdir to be determined in some non-trivial cases where parent directories have config files as well.
#7814: Fixed crash in header reporting when testpaths is used and contains absolute paths (regression in 6.1.0).

pytest 6.1.0 (2020-09-26)¶

Breaking Changes¶

#5585: As per our policy, the following features which have been deprecated in the 5.X series are now removed:
- The funcargnames read-only property of FixtureRequest, Metafunc, and Function classes. Use fixturenames attribute.
- @pytest.fixture no longer supports positional arguments, pass all arguments by keyword instead.
- Direct construction of Node subclasses now raise an error, use from_parent instead.
- The default value for junit_family has changed to xunit2. If you require the old format, add junit_family=xunit1 to your configuration file.
- The TerminalReporter no longer has a writer attribute. Plugin authors may use the public functions of the TerminalReporter instead of accessing the TerminalWriter object directly.
- The --result-log option has been removed. Users are recommended to use the pytest-reportlog plugin instead.
For more information consult Deprecations and Removals in the docs.

Deprecations¶

#6981: The pytest.collect module is deprecated: all its names can be imported from pytest directly.
#7097: The pytest._fillfuncargs function is deprecated. This function was kept for backward compatibility with an older plugin.

It’s functionality is not meant to be used directly, but if you must replace it, use function._request._fillfixtures() instead, though note this is not a public API and may break in the future.
#7210: The special -k '-expr' syntax to -k is deprecated. Use -k 'not expr' instead.

The special -k 'expr:' syntax to -k is deprecated. Please open an issue if you use this and want a replacement.
#7255: The pytest_warning_captured hook is deprecated in favor of pytest_warning_recorded, and will be removed in a future version.
#7648: The gethookproxy() and isinitpath() methods of FSCollector and Package are deprecated; use self.session.gethookproxy() and self.session.isinitpath() instead. This should work on all pytest versions.

Features¶

#7667: New --durations-min command-line flag controls the minimal duration for inclusion in the slowest list of tests shown by --durations. Previously this was hard-coded to 0.005s.

Improvements¶

#6681: Internal pytest warnings issued during the early stages of initialization are now properly handled and can filtered through filterwarnings or --pythonwarnings/-W.

This also fixes a number of long standing issues: #2891, #7620, #7426.
#7572: When a plugin listed in required_plugins is missing or an unknown config key is used with --strict-config, a simple error message is now shown instead of a stacktrace.
#7685: Added two new attributes rootpath and inipath to Config. These attributes are pathlib.Path versions of the existing rootdir and inifile attributes, and should be preferred over them when possible.
#7780: Public classes which are not designed to be inherited from are now marked @final. Code which inherits from these classes will trigger a type-checking (e.g. mypy) error, but will still work in runtime. Currently the final designation does not appear in the API Reference but hopefully will in the future.

Bug Fixes¶

#1953: Fixed error when overwriting a parametrized fixture, while also reusing the super fixture value.

# conftest.py
import pytest


@pytest.fixture(params=[1, 2])
def foo(request):
    return request.param


# test_foo.py
import pytest


@pytest.fixture
def foo(foo):
    return foo * 2

#4984: Fixed an internal error crash with IndexError: list index out of range when collecting a module which starts with a decorated function, the decorator raises, and assertion rewriting is enabled.
#7591: pylint shouldn’t complain anymore about unimplemented abstract methods when inheriting from File.
#7628: Fixed test collection when a full path without a drive letter was passed to pytest on Windows (for example \projects\tests\test.py instead of c:\projects\tests\pytest.py).
#7638: Fix handling of command-line options that appear as paths but trigger an OS-level syntax error on Windows, such as the options used internally by pytest-xdist.
#7742: Fixed INTERNALERROR when accessing locals / globals with faulty exec.

Improved Documentation¶

#1477: Removed faq.rst and its reference in contents.rst.

Trivial/Internal Changes¶

#7536: The internal junitxml plugin has rewritten to use xml.etree.ElementTree. The order of attributes in XML elements might differ. Some unneeded escaping is no longer performed.
#7587: The dependency on the more-itertools package has been removed.
#7631: The result type of capfd.readouterr() (and similar) is no longer a namedtuple, but should behave like one in all respects. This was done for technical reasons.
#7671: When collecting tests, pytest finds test classes and functions by examining the attributes of python objects (modules, classes and instances). To speed up this process, pytest now ignores builtin attributes (like __class__, __delattr__ and __new__) without consulting the python_classes and python_functions configuration options and without passing them to plugins using the pytest_pycollect_makeitem hook.

pytest 6.0.2 (2020-09-04)¶

Bug Fixes¶

#7148: Fixed --log-cli potentially causing unrelated print output to be swallowed.
#7672: Fixed log-capturing level restored incorrectly if caplog.set_level is called more than once.
#7686: Fixed NotSetType.token being used as the parameter ID when the parametrization list is empty. Regressed in pytest 6.0.0.
#7707: Fix internal error when handling some exceptions that contain multiple lines or the style uses multiple lines (--tb=line for example).

pytest 6.0.1 (2020-07-30)¶

Bug Fixes¶

#7394: Passing an empty help value to Parser.add_option is now accepted instead of crashing when running pytest --help. Passing None raises a more informative TypeError.
#7558: Fix pylint not-callable lint on pytest.mark.parametrize() and the other builtin marks: skip, skipif, xfail, usefixtures, filterwarnings.
#7559: Fix regression in plugins using TestReport.longreprtext (such as pytest-html) when TestReport.longrepr is not a string.
#7569: Fix logging capture handler’s level not reset on teardown after a call to caplog.set_level().

pytest 6.0.0 (2020-07-28)¶

(Please see the full set of changes for this release also in the 6.0.0rc1 notes below)

Breaking Changes¶

#5584: PytestDeprecationWarning are now errors by default.

Following our plan to remove deprecated features with as little disruption as possible, all warnings of type PytestDeprecationWarning now generate errors instead of warning messages.

The affected features will be effectively removed in pytest 6.1, so please consult the Deprecations and Removals section in the docs for directions on how to update existing code.

In the pytest 6.0.X series, it is possible to change the errors back into warnings as a stopgap measure by adding this to your pytest.ini file:
```
[pytest]
filterwarnings =
    ignore::pytest.PytestDeprecationWarning
```
But this will stop working when pytest 6.1 is released.

If you have concerns about the removal of a specific feature, please add a comment to #5584.
#7472: The exec_() and is_true() methods of _pytest._code.Frame have been removed.

Features¶

#7464: Added support for NO_COLOR and FORCE_COLOR environment variables to control colored output.

Improvements¶

#7467: --log-file CLI option and log_file ini marker now create subdirectories if needed.
#7489: The pytest.raises() function has a clearer error message when match equals the obtained string but is not a regex match. In this case it is suggested to escape the regex.

Bug Fixes¶

#7392: Fix the reported location of tests skipped with @pytest.mark.skip when --runxfail is used.
#7491: tmpdir and tmp_path no longer raise an error if the lock to check for stale temporary directories is not accessible.
#7517: Preserve line endings when captured via capfd.
#7534: Restored the previous formatting of TracebackEntry.__str__ which was changed by accident.

Improved Documentation¶

#7422: Clarified when the usefixtures mark can apply fixtures to test.
#7441: Add a note about -q option used in getting started guide.

Trivial/Internal Changes¶

#7389: Fixture scope package is no longer considered experimental.

pytest 6.0.0rc1 (2020-07-08)¶

Breaking Changes¶

#1316: TestReport.longrepr is now always an instance of ReprExceptionInfo. Previously it was a str when a test failed with pytest.fail(..., pytrace=False).
#5965: symlinks are no longer resolved during collection and matching conftest.py files with test file paths.

Resolving symlinks for the current directory and during collection was introduced as a bugfix in 3.9.0, but it actually is a new feature which had unfortunate consequences in Windows and surprising results in other platforms.

The team decided to step back on resolving symlinks at all, planning to review this in the future with a more solid solution (see discussion in #6523 for details).

This might break test suites which made use of this feature; the fix is to create a symlink for the entire test tree, and not only to partial files/tress as it was possible previously.
#6505: Testdir.run().parseoutcomes() now always returns the parsed nouns in plural form.

Originally parseoutcomes() would always returns the nouns in plural form, but a change meant to improve the terminal summary by using singular form single items (1 warning or 1 error) caused an unintended regression by changing the keys returned by parseoutcomes().

Now the API guarantees to always return the plural form, so calls like this:
```
result = testdir.runpytest()
result.assert_outcomes(error=1)
```
Need to be changed to:
```
result = testdir.runpytest()
result.assert_outcomes(errors=1)
```
#6903: The os.dup() function is now assumed to exist. We are not aware of any supported Python 3 implementations which do not provide it.
#7040: -k no longer matches against the names of the directories outside the test session root.

Also, pytest.Package.name is now just the name of the directory containing the package’s __init__.py file, instead of the full path. This is consistent with how the other nodes are named, and also one of the reasons why -k would match against any directory containing the test suite.
#7122: Expressions given to the -m and -k options are no longer evaluated using Python’s eval(). The format supports or, and, not, parenthesis and general identifiers to match against. Python constants, keywords or other operators are no longer evaluated differently.
#7135: Pytest now uses its own TerminalWriter class instead of using the one from the py library. Plugins generally access this class through TerminalReporter.writer, TerminalReporter.write() (and similar methods), or _pytest.config.create_terminal_writer().

The following breaking changes were made:
- Output (write() method and others) no longer flush implicitly; the flushing behavior of the underlying file is respected. To flush explicitly (for example, if you want output to be shown before an end-of-line is printed), use write(flush=True) or terminal_writer.flush().
- Explicit Windows console support was removed, delegated to the colorama library.
- Support for writing bytes was removed.
- The reline method and chars_on_current_line property were removed.
- The stringio and encoding arguments was removed.
- Support for passing a callable instead of a file was removed.
#7224: The item.catch_log_handler and item.catch_log_handlers attributes, set by the logging plugin and never meant to be public, are no longer available.

The deprecated --no-print-logs option and log_print ini option are removed. Use --show-capture instead.
#7226: Removed the unused args parameter from pytest.Function.__init__.
#7418: Removed the pytest_doctest_prepare_content hook specification. This hook hasn’t been triggered by pytest for at least 10 years.
#7438: Some changes were made to the internal _pytest._code.source, listed here for the benefit of plugin authors who may be using it:
- The deindent argument to Source() has been removed, now it is always true.
- Support for zero or multiple arguments to Source() has been removed.
- Support for comparing Source with an str has been removed.
- The methods Source.isparseable() and Source.putaround() have been removed.
- The method Source.compile() and function _pytest._code.compile() have been removed; use plain compile() instead.
- The function _pytest._code.source.getsource() has been removed; use Source() directly instead.

Deprecations¶

#7210: The special -k '-expr' syntax to -k is deprecated. Use -k 'not expr' instead.

The special -k 'expr:' syntax to -k is deprecated. Please open an issue if you use this and want a replacement.
#4049: pytest_warning_captured is deprecated in favor of the pytest_warning_recorded hook.

Features¶

#1556: pytest now supports pyproject.toml files for configuration.

The configuration options is similar to the one available in other formats, but must be defined in a [tool.pytest.ini_options] table to be picked up by pytest:
```
# pyproject.toml
[tool.pytest.ini_options]
minversion = "6.0"
addopts = "-ra -q"
testpaths = [
    "tests",
    "integration",
]
```
More information can be found in the docs.
#3342: pytest now includes inline type annotations and exposes them to user programs. Most of the user-facing API is covered, as well as internal code.

If you are running a type checker such as mypy on your tests, you may start noticing type errors indicating incorrect usage. If you run into an error that you believe to be incorrect, please let us know in an issue.

The types were developed against mypy version 0.780. Versions before 0.750 are known not to work. We recommend using the latest version. Other type checkers may work as well, but they are not officially verified to work by pytest yet.
#4049: Introduced a new hook named pytest_warning_recorded to convey information about warnings captured by the internal pytest warnings plugin.

This hook is meant to replace pytest_warning_captured, which is deprecated and will be removed in a future release.
#6471: New command-line flags:
- --no-header: disables the initial header, including platform, version, and plugins.
- --no-summary: disables the final test summary, including warnings.
#6856: A warning is now shown when an unknown key is read from a config INI file.

The --strict-config flag has been added to treat these warnings as errors.
#6906: Added --code-highlight command line option to enable/disable code highlighting in terminal output.
#7245: New --import-mode=importlib option that uses importlib to import test modules.

Traditionally pytest used __import__ while changing sys.path to import test modules (which also changes sys.modules as a side-effect), which works but has a number of drawbacks, like requiring test modules that don’t live in packages to have unique names (as they need to reside under a unique name in sys.modules).

--import-mode=importlib uses more fine-grained import mechanisms from importlib which don’t require pytest to change sys.path or sys.modules at all, eliminating much of the drawbacks of the previous mode.

We intend to make --import-mode=importlib the default in future versions, so users are encouraged to try the new mode and provide feedback (both positive or negative) in issue #7245.

You can read more about this option in the documentation.
#7305: New required_plugins configuration option allows the user to specify a list of plugins, including version information, that are required for pytest to run. An error is raised if any required plugins are not found when running pytest.

Improvements¶

#4375: The pytest command now suppresses the BrokenPipeError error message that is printed to stderr when the output of pytest is piped and the pipe is closed by the piped-to program (common examples are less and head).
#4391: Improved precision of test durations measurement. CallInfo items now have a new <CallInfo>.duration attribute, created using time.perf_counter(). This attribute is used to fill the <TestReport>.duration attribute, which is more accurate than the previous <CallInfo>.stop - <CallInfo>.start (as these are based on time.time()).
#4675: Rich comparison for dataclasses and attrs-classes is now recursive.
#6285: Exposed the pytest.FixtureLookupError exception which is raised by request.getfixturevalue() (where request is a FixtureRequest fixture) when a fixture with the given name cannot be returned.
#6433: If an error is encountered while formatting the message in a logging call, for example logging.warning("oh no!: %s: %s", "first") (a second argument is missing), pytest now propagates the error, likely causing the test to fail.

Previously, such a mistake would cause an error to be printed to stderr, which is not displayed by default for passing tests. This change makes the mistake visible during testing.

You may suppress this behavior temporarily or permanently by setting logging.raiseExceptions = False.
#6817: Explicit new-lines in help texts of command-line options are preserved, allowing plugins better control of the help displayed to users.
#6940: When using the --duration option, the terminal message output is now more precise about the number and duration of hidden items.
#6991: Collected files are displayed after any reports from hooks, e.g. the status from --lf.
#7091: When fd capturing is used, through --capture=fd or the capfd and capfdbinary fixtures, and the file descriptor (0, 1, 2) cannot be duplicated, FD capturing is still performed. Previously, direct writes to the file descriptors would fail or be lost in this case.
#7119: Exit with an error if the --basetemp argument is empty, is the current working directory or is one of the parent directories. This is done to protect against accidental data loss, as any directory passed to this argument is cleared.
#7128: pytest --version now displays just the pytest version, while pytest --version --version displays more verbose information including plugins. This is more consistent with how other tools show --version.
#7133: caplog.set_level() will now override any log_level set via the CLI or configuration file.
#7159: caplog.set_level() and caplog.at_level() no longer affect the level of logs that are shown in the Captured log report report section.
#7348: Improve recursive diff report for comparison asserts on dataclasses / attrs.
#7385: --junitxml now includes the exception cause in the message XML attribute for failures during setup and teardown.

Previously:
```
<error message="test setup failure">
```
Now:
```
<error message="failed on setup with &quot;ValueError: Some error during setup&quot;">
```

Bug Fixes¶

#1120: Fix issue where directories from tmpdir are not removed properly when multiple instances of pytest are running in parallel.
#4583: Prevent crashing and provide a user-friendly error when a marker expression (-m) invoking of eval() raises any exception.
#4677: The path shown in the summary report for SKIPPED tests is now always relative. Previously it was sometimes absolute.
#5456: Fix a possible race condition when trying to remove lock files used to control access to folders created by tmp_path and tmpdir.
#6240: Fixes an issue where logging during collection step caused duplication of log messages to stderr.
#6428: Paths appearing in error messages are now correct in case the current working directory has changed since the start of the session.
#6755: Support deleting paths longer than 260 characters on windows created inside tmpdir.
#6871: Fix crash with captured output when using capsysbinary.
#6909: Revert the change introduced by #6330, which required all arguments to @pytest.mark.parametrize to be explicitly defined in the function signature.

The intention of the original change was to remove what was expected to be an unintended/surprising behavior, but it turns out many people relied on it, so the restriction has been reverted.
#6910: Fix crash when plugins return an unknown stats while using the --reportlog option.
#6924: Ensure a unittest.IsolatedAsyncioTestCase is actually awaited.
#6925: Fix TerminalRepr instances to be hashable again.
#6947: Fix regression where functions registered with unittest.TestCase.addCleanup() were not being called on test failures.
#6951: Allow users to still set the deprecated TerminalReporter.writer attribute.
#6956: Prevent pytest from printing ConftestImportFailure traceback to stdout.
#6991: Fix regressions with --lf filtering too much since pytest 5.4.
#6992: Revert “tmpdir: clean up indirection via config for factories” #6767 as it breaks pytest-xdist.
#7061: When a yielding fixture fails to yield a value, report a test setup error instead of crashing.
#7076: The path of file skipped by @pytest.mark.skip in the SKIPPED report is now relative to invocation directory. Previously it was relative to root directory.
#7110: Fixed regression: asyncbase.TestCase tests are executed correctly again.
#7126: --setup-show now doesn’t raise an error when a bytes value is used as a parametrize parameter when Python is called with the -bb flag.
#7143: Fix pytest.File.from_parent so it forwards extra keyword arguments to the constructor.
#7145: Classes with broken __getattribute__ methods are displayed correctly during failures.
#7150: Prevent hiding the underlying exception when ConfTestImportFailure is raised.
#7180: Fix _is_setup_py for files encoded differently than locale.
#7215: Fix regression where running with --pdb would call unittest.TestCase.tearDown() for skipped tests.
#7253: When using pytest.fixture on a function directly, as in pytest.fixture(func), if the autouse or params arguments are also passed, the function is no longer ignored, but is marked as a fixture.
#7360: Fix possibly incorrect evaluation of string expressions passed to pytest.mark.skipif and pytest.mark.xfail, in rare circumstances where the exact same string is used but refers to different global values.
#7383: Fixed exception causes all over the codebase, i.e. use raise new_exception from old_exception when wrapping an exception.

Improved Documentation¶

#7202: The development guide now links to the contributing section of the docs and RELEASING.rst on GitHub.
#7233: Add a note about --strict and --strict-markers and the preference for the latter one.
#7345: Explain indirect parametrization and markers for fixtures.

Trivial/Internal Changes¶

#7035: The originalname attribute of _pytest.python.Function now defaults to name if not provided explicitly, and is always set.
#7264: The dependency on the wcwidth package has been removed.
#7291: Replaced py.iniconfig with iniconfig.
#7295: src/_pytest/config/__init__.py now uses the warnings module to report warnings instead of sys.stderr.write.
#7356: Remove last internal uses of deprecated slave term from old pytest-xdist.
#7357: py>=1.8.2 is now required.

pytest 5.4.3 (2020-06-02)¶

Bug Fixes¶

#6428: Paths appearing in error messages are now correct in case the current working directory has changed since the start of the session.
#6755: Support deleting paths longer than 260 characters on windows created inside tmpdir.
#6956: Prevent pytest from printing ConftestImportFailure traceback to stdout.
#7150: Prevent hiding the underlying exception when ConfTestImportFailure is raised.
#7215: Fix regression where running with --pdb would call the tearDown methods of unittest.TestCase subclasses for skipped tests.

pytest 5.4.2 (2020-05-08)¶

Bug Fixes¶

#6871: Fix crash with captured output when using the capsysbinary fixture.
#6924: Ensure a unittest.IsolatedAsyncioTestCase is actually awaited.
#6925: Fix TerminalRepr instances to be hashable again.
#6947: Fix regression where functions registered with TestCase.addCleanup were not being called on test failures.
#6951: Allow users to still set the deprecated TerminalReporter.writer attribute.
#6992: Revert “tmpdir: clean up indirection via config for factories” #6767 as it breaks pytest-xdist.
#7110: Fixed regression: asyncbase.TestCase tests are executed correctly again.
#7143: Fix File.from_parent so it forwards extra keyword arguments to the constructor.
#7145: Classes with broken __getattribute__ methods are displayed correctly during failures.
#7180: Fix _is_setup_py for files encoded differently than locale.

pytest 5.4.1 (2020-03-13)¶

Bug Fixes¶

#6909: Revert the change introduced by #6330, which required all arguments to @pytest.mark.parametrize to be explicitly defined in the function signature.

The intention of the original change was to remove what was expected to be an unintended/surprising behavior, but it turns out many people relied on it, so the restriction has been reverted.
#6910: Fix crash when plugins return an unknown stats while using the --reportlog option.

pytest 5.4.0 (2020-03-12)¶

Breaking Changes¶

#6316: Matching of -k EXPRESSION to test names is now case-insensitive.
#6443: Plugins specified with -p are now loaded after internal plugins, which results in their hooks being called before the internal ones.

This makes the -p behavior consistent with PYTEST_PLUGINS.
#6637: Removed the long-deprecated pytest_itemstart hook.

This hook has been marked as deprecated and not been even called by pytest for over 10 years now.
#6673: Reversed / fix meaning of “+/-” in error diffs. “-” means that something expected is missing in the result and “+” means that there are unexpected extras in the result.
#6737: The cached_result attribute of FixtureDef is now set to None when the result is unavailable, instead of being deleted.

If your plugin performs checks like hasattr(fixturedef, 'cached_result'), for example in a pytest_fixture_post_finalizer hook implementation, replace it with fixturedef.cached_result is not None. If you del the attribute, set it to None instead.

Deprecations¶

#3238: Option --no-print-logs is deprecated and meant to be removed in a future release. If you use --no-print-logs, please try out --show-capture and provide feedback.

--show-capture command-line option was added in pytest 3.5.0 and allows to specify how to display captured output when tests fail: no, stdout, stderr, log or all (the default).
#571: Deprecate the unused/broken pytest_collect_directory hook. It was misaligned since the removal of the Directory collector in 2010 and incorrect/unusable as soon as collection was split from test execution.
#5975: Deprecate using direct constructors for Nodes.

Instead they are now constructed via Node.from_parent.

This transitional mechanism enables us to untangle the very intensely entangled Node relationships by enforcing more controlled creation/configuration patterns.

As part of this change, session/config are already disallowed parameters and as we work on the details we might need disallow a few more as well.

Subclasses are expected to use super().from_parent if they intend to expand the creation of Nodes.
#6779: The TerminalReporter.writer attribute has been deprecated and should no longer be used. This was inadvertently exposed as part of the public API of that plugin and ties it too much with py.io.TerminalWriter.

Features¶

#4597: New –capture=tee-sys option to allow both live printing and capturing of test output.
#5712: Now all arguments to @pytest.mark.parametrize need to be explicitly declared in the function signature or via indirect. Previously it was possible to omit an argument if a fixture with the same name existed, which was just an accident of implementation and was not meant to be a part of the API.
#6454: Changed default for -r to fE, which displays failures and errors in the short test summary. -rN can be used to disable it (the old behavior).
#6469: New options have been added to the junit_logging option: log, out-err, and all.
#6834: Excess warning summaries are now collapsed per file to ensure readable display of warning summaries.

Improvements¶

#1857: pytest.mark.parametrize accepts integers for ids again, converting it to strings.
#449: Use “yellow” main color with any XPASSED tests.
#4639: Revert “A warning is now issued when assertions are made for None”.

The warning proved to be less useful than initially expected and had quite a few false positive cases.
#5686: tmpdir_factory.mktemp now fails when given absolute and non-normalized paths.
#5984: The pytest_warning_captured hook now receives a location parameter with the code location that generated the warning.
#6213: pytester: the testdir fixture respects environment settings from the monkeypatch fixture for inner runs.
#6247: --fulltrace is honored with collection errors.
#6384: Make --showlocals work also with --tb=short.
#6653: Add support for matching lines consecutively with LineMatcher’s fnmatch_lines() and re_match_lines().
#6658: Code is now highlighted in tracebacks when pygments is installed.

Users are encouraged to install pygments into their environment and provide feedback, because the plan is to make pygments a regular dependency in the future.
#6795: Import usage error message with invalid -o option.
#759: pytest.mark.parametrize supports iterators and generators for ids.

Bug Fixes¶

#310: Add support for calling pytest.xfail() and pytest.importorskip() with doctests.
#3823: --trace now works with unittests.
#4445: Fixed some warning reports produced by pytest to point to the correct location of the warning in the user’s code.
#5301: Fix --last-failed to collect new tests from files with known failures.
#5928: Report PytestUnknownMarkWarning at the level of the user’s code, not pytest’s.
#5991: Fix interaction with --pdb and unittests: do not use unittest’s TestCase.debug().
#6334: Fix summary entries appearing twice when f/F and s/S report chars were used at the same time in the -r command-line option (for example -rFf).

The upper case variants were never documented and the preferred form should be the lower case.
#6409: Fallback to green (instead of yellow) for non-last items without previous passes with colored terminal progress indicator.
#6454: --disable-warnings is honored with -ra and -rA.
#6497: Fix bug in the comparison of request key with cached key in fixture.

A construct if key == cached_key: can fail either because == is explicitly disallowed, or for, e.g., NumPy arrays, where the result of a == b cannot generally be converted to bool. The implemented fix replaces == with is.
#6557: Make capture output streams .write() method return the same return value from original streams.
#6566: Fix EncodedFile.writelines to call the underlying buffer’s writelines method.
#6575: Fix internal crash when faulthandler starts initialized (for example with PYTHONFAULTHANDLER=1 environment variable set) and faulthandler_timeout defined in the configuration file.
#6597: Fix node ids which contain a parametrized empty-string variable.
#6646: Assertion rewriting hooks are (re)stored for the current item, which fixes them being still used after e.g. pytester’s testdir.runpytest etc.
#6660: pytest.exit() is handled when emitted from the pytest_sessionfinish hook. This includes quitting from a debugger.
#6752: When pytest.raises() is used as a function (as opposed to a context manager), a match keyword argument is now passed through to the tested function. Previously it was swallowed and ignored (regression in pytest 5.1.0).
#6801: Do not display empty lines in between traceback for unexpected exceptions with doctests.
#6802: The testdir fixture works within doctests now.

Improved Documentation¶

#6696: Add list of fixtures to start of fixture chapter.
#6742: Expand first sentence on fixtures into a paragraph.

Trivial/Internal Changes¶

#6404: Remove usage of parser module, deprecated in Python 3.9.

pytest 5.3.5 (2020-01-29)¶

Bug Fixes¶

#6517: Fix regression in pytest 5.3.4 causing an INTERNALERROR due to a wrong assertion.

pytest 5.3.4 (2020-01-20)¶

Bug Fixes¶

#6496: Revert #6436: unfortunately this change has caused a number of regressions in many suites, so the team decided to revert this change and make a new release while we continue to look for a solution.

pytest 5.3.3 (2020-01-16)¶

Bug Fixes¶

#2780: Captured output during teardown is shown with -rP.
#5971: Fix a pytest-xdist crash when dealing with exceptions raised in subprocesses created by the multiprocessing module.
#6436: FixtureDef objects now properly register their finalizers with autouse and parameterized fixtures that execute before them in the fixture stack so they are torn down at the right times, and in the right order.
#6532: Fix parsing of outcomes containing multiple errors with testdir results (regression in 5.3.0).

Trivial/Internal Changes¶

#6350: Optimized automatic renaming of test parameter IDs.

pytest 5.3.2 (2019-12-13)¶

Improvements¶

#4639: Revert “A warning is now issued when assertions are made for None”.

The warning proved to be less useful than initially expected and had quite a few false positive cases.

Bug Fixes¶

#5430: junitxml: Logs for failed test are now passed to junit report in case the test fails during call phase.
#6290: The supporting files in the .pytest_cache directory are kept with --cache-clear, which only clears cached values now.
#6301: Fix assertion rewriting for egg-based distributions and editable installs (pip install --editable).

pytest 5.3.1 (2019-11-25)¶

Improvements¶

#6231: Improve check for misspelling of pytest.mark.parametrize.
#6257: Handle pytest.exit() being used via pytest_internalerror, e.g. when quitting pdb from post mortem.

Bug Fixes¶

#5914: pytester: fix no_fnmatch_line() when used after positive matching.
#6082: Fix line detection for doctest samples inside property docstrings, as a workaround to python/cpython#61648.
#6254: Fix compatibility with pytest-parallel (regression in pytest 5.3.0).
#6255: Clear the sys.last_traceback, sys.last_type and sys.last_value attributes by deleting them instead of setting them to None. This better matches the behaviour of the Python standard library.

pytest 5.3.0 (2019-11-19)¶

Deprecations¶

#6179: The default value of junit_family option will change to "xunit2" in pytest 6.0, given that this is the version supported by default in modern tools that manipulate this type of file.

In order to smooth the transition, pytest will issue a warning in case the --junitxml option is given in the command line but junit_family is not explicitly configured in pytest.ini.

For more information, see the docs.

Features¶

#4488: The pytest team has created the pytest-reportlog plugin, which provides a new --report-log=FILE option that writes report logs into a file as the test session executes.

Each line of the report log contains a self contained JSON object corresponding to a testing event, such as a collection or a test result report. The file is guaranteed to be flushed after writing each line, so systems can read and process events in real-time.

The plugin is meant to replace the --resultlog option, which is deprecated and meant to be removed in a future release. If you use --resultlog, please try out pytest-reportlog and provide feedback.
#4730: When sys.pycache_prefix (Python 3.8+) is set, it will be used by pytest to cache test files changed by the assertion rewriting mechanism.

This makes it easier to benefit of cached .pyc files even on file systems without permissions.
#5515: Allow selective auto-indentation of multiline log messages.

Adds command line option --log-auto-indent, config option log_auto_indent and support for per-entry configuration of indentation behavior on calls to logging.log().

Alters the default for auto-indention from "on" to "off". This restores the older behavior that existed prior to v4.6.0. This reversion to earlier behavior was done because it is better to activate new features that may lead to broken tests explicitly rather than implicitly.
#5914: testdir learned two new functions, no_fnmatch_line() and no_re_match_line().

The functions are used to ensure the captured text does not match the given pattern.

The previous idiom was to use re.match():
```
result = testdir.runpytest()
assert re.match(pat, result.stdout.str()) is None
```
Or the in operator:
```
result = testdir.runpytest()
assert text in result.stdout.str()
```
But the new functions produce best output on failure.
#6057: Added tolerances to complex values when printing pytest.approx.

For example, repr(pytest.approx(3+4j)) returns (3+4j) ± 5e-06 ∠ ±180°. This is polar notation indicating a circle around the expected value, with a radius of 5e-06. For approx comparisons to return True, the actual value should fall within this circle.
#6061: Added the pluginmanager as an argument to pytest_addoption so that hooks can be invoked when setting up command line options. This is useful for having one plugin communicate things to another plugin, such as default values or which set of command line options to add.

Improvements¶

#5061: Use multiple colors with terminal summary statistics.
#5630: Quitting from debuggers is now properly handled in doctest items.

#5924: Improved verbose diff output with sequences.

Before:

E   AssertionError: assert ['version', '...version_info'] == ['version', '...version', ...]
E     Right contains 3 more items, first extra item: ' '
E     Full diff:
E     - ['version', 'version_info', 'sys.version', 'sys.version_info']
E     + ['version',
E     +  'version_info',
E     +  'sys.version',
E     +  'sys.version_info',
E     +  ' ',
E     +  'sys.version',
E     +  'sys.version_info']

After:

E   AssertionError: assert ['version', '...version_info'] == ['version', '...version', ...]
E     Right contains 3 more items, first extra item: ' '
E     Full diff:
E       [
E        'version',
E        'version_info',
E        'sys.version',
E        'sys.version_info',
E     +  ' ',
E     +  'sys.version',
E     +  'sys.version_info',
E       ]

#5934: repr of ExceptionInfo objects has been improved to honor the __repr__ method of the underlying exception.
#5936: Display untruncated assertion message with -vv.
#5990: Fixed plurality mismatch in test summary (e.g. display “1 error” instead of “1 errors”).
#6008: Config.InvocationParams.args is now always a tuple to better convey that it should be immutable and avoid accidental modifications.
#6023: pytest.main returns a pytest.ExitCode instance now, except for when custom exit codes are used (where it returns int then still).
#6026: Align prefixes in output of pytester’s LineMatcher.
#6059: Collection errors are reported as errors (and not failures like before) in the terminal’s short test summary.
#6069: pytester.spawn does not skip/xfail tests on FreeBSD anymore unconditionally.
#6097: The “[…%]” indicator in the test summary is now colored according to the final (new) multi-colored line’s main color.
#6116: Added --co as a synonym to --collect-only.
#6148: atomicwrites is now only used on Windows, fixing a performance regression with assertion rewriting on Unix.
#6152: Now parametrization will use the __name__ attribute of any object for the id, if present. Previously it would only use __name__ for functions and classes.
#6176: Improved failure reporting with pytester’s Hookrecorder.assertoutcome.
#6181: The reason for a stopped session, e.g. with --maxfail / -x, now gets reported in the test summary.
#6206: Improved cache.set robustness and performance.

Bug Fixes¶

#2049: Fixed --setup-plan showing inaccurate information about fixture lifetimes.
#2548: Fixed line offset mismatch of skipped tests in terminal summary.
#6039: The PytestDoctestRunner is now properly invalidated when unconfiguring the doctest plugin.

This is important when used with pytester’s runpytest_inprocess.
#6047: BaseExceptions are now handled in saferepr, which includes pytest.fail.Exception etc.
#6074: pytester: fixed order of arguments in rm_rf warning when cleaning up temporary directories, and do not emit warnings for errors with os.open.
#6189: Fixed result of getmodpath method.

Trivial/Internal Changes¶

#4901: RunResult from pytester now displays the mnemonic of the ret attribute when it is a valid pytest.ExitCode value.

pytest 5.2.4 (2019-11-15)¶

Bug Fixes¶

#6194: Fix incorrect discovery of non-test __init__.py files.
#6197: Revert “The first test in a package (__init__.py) marked with @pytest.mark.skip is now correctly skipped.”.

pytest 5.2.3 (2019-11-14)¶

Bug Fixes¶

#5830: The first test in a package (__init__.py) marked with @pytest.mark.skip is now correctly skipped.
#6099: Fix --trace when used with parametrized functions.
#6183: Using request as a parameter name in @pytest.mark.parametrize now produces a more user-friendly error.

pytest 5.2.2 (2019-10-24)¶

Bug Fixes¶

#5206: Fix --nf to not forget about known nodeids with partial test selection.
#5906: Fix crash with KeyboardInterrupt during --setup-show.
#5946: Fixed issue when parametrizing fixtures with numpy arrays (and possibly other sequence-like types).
#6044: Properly ignore FileNotFoundError exceptions when trying to remove old temporary directories, for instance when multiple processes try to remove the same directory (common with pytest-xdist for example).

pytest 5.2.1 (2019-10-06)¶

Bug Fixes¶

#5902: Fix warnings about deprecated cmp attribute in attrs>=19.2.

pytest 5.2.0 (2019-09-28)¶

Deprecations¶

#1682: Passing arguments to pytest.fixture() as positional arguments is deprecated - pass them as a keyword argument instead.

Features¶

#1682: The scope parameter of @pytest.fixture can now be a callable that receives the fixture name and the config object as keyword-only parameters. See the docs for more information.
#5764: New behavior of the --pastebin option: failures to connect to the pastebin server are reported, without failing the pytest run

Bug Fixes¶

#5806: Fix “lexer” being used when uploading to bpaste.net from --pastebin to “text”.
#5884: Fix --setup-only and --setup-show for custom pytest items.

Trivial/Internal Changes¶

#5056: The HelpFormatter uses py.io.get_terminal_width for better width detection.

pytest 5.1.3 (2019-09-18)¶

Bug Fixes¶

#5807: Fix pypy3.6 (nightly) on windows.
#5811: Handle --fulltrace correctly with pytest.raises.
#5819: Windows: Fix regression with conftest whose qualified name contains uppercase characters (introduced by #5792).

pytest 5.1.2 (2019-08-30)¶

Bug Fixes¶

#2270: Fixed self reference in function-scoped fixtures defined plugin classes: previously self would be a reference to a test class, not the plugin class.
#570: Fixed long standing issue where fixture scope was not respected when indirect fixtures were used during parametrization.
#5782: Fix decoding error when printing an error response from --pastebin.
#5786: Chained exceptions in test and collection reports are now correctly serialized, allowing plugins like pytest-xdist to display them properly.
#5792: Windows: Fix error that occurs in certain circumstances when loading conftest.py from a working directory that has casing other than the one stored in the filesystem (e.g., c:\test instead of C:\test).

pytest 5.1.1 (2019-08-20)¶

Bug Fixes¶

#5751: Fixed TypeError when importing pytest on Python 3.5.0 and 3.5.1.

pytest 5.1.0 (2019-08-15)¶

Removals¶

#5180: As per our policy, the following features have been deprecated in the 4.X series and are now removed:
- Request.getfuncargvalue: use Request.getfixturevalue instead.
- pytest.raises and pytest.warns no longer support strings as the second argument.
- message parameter of pytest.raises.
- pytest.raises, pytest.warns and ParameterSet.param now use native keyword-only syntax. This might change the exception message from previous versions, but they still raise TypeError on unknown keyword arguments as before.
- pytest.config global variable.
- tmpdir_factory.ensuretemp method.
- pytest_logwarning hook.
- RemovedInPytest4Warning warning type.
- request is now a reserved name for fixtures.
For more information consult Deprecations and Removals in the docs.
#5565: Removed unused support code for unittest2.

The unittest2 backport module is no longer necessary since Python 3.3+, and the small amount of code in pytest to support it also doesn’t seem to be used: after removed, all tests still pass unchanged.

Although our policy is to introduce a deprecation period before removing any features or support for third party libraries, because this code is apparently not used at all (even if unittest2 is used by a test suite executed by pytest), it was decided to remove it in this release.

If you experience a regression because of this, please file an issue.
#5615: pytest.fail, pytest.xfail and pytest.skip no longer support bytes for the message argument.

This was supported for Python 2 where it was tempting to use "message" instead of u"message".

Python 3 code is unlikely to pass bytes to these functions. If you do, please decode it to an str beforehand.

Features¶

#5564: New Config.invocation_args attribute containing the unchanged arguments passed to pytest.main().
#5576: New NUMBER option for doctests to ignore irrelevant differences in floating-point numbers. Inspired by Sébastien Boisgérault’s numtest extension for doctest.

Improvements¶

#5471: JUnit XML now includes a timestamp and hostname in the testsuite tag.
#5707: Time taken to run the test suite now includes a human-readable representation when it takes over 60 seconds, for example:
```
===== 2 failed in 102.70s (0:01:42) =====
```

Bug Fixes¶

#4344: Fix RuntimeError/StopIteration when trying to collect package with “__init__.py” only.
#5115: Warnings issued during pytest_configure are explicitly not treated as errors, even if configured as such, because it otherwise completely breaks pytest.
#5477: The XML file produced by --junitxml now correctly contain a <testsuites> root element.
#5524: Fix issue where tmp_path and tmpdir would not remove directories containing files marked as read-only, which could lead to pytest crashing when executed a second time with the --basetemp option.
#5537: Replace importlib_metadata backport with importlib.metadata from the standard library on Python 3.8+.
#5578: Improve type checking for some exception-raising functions (pytest.xfail, pytest.skip, etc) so they provide better error messages when users meant to use marks (for example @pytest.xfail instead of @pytest.mark.xfail).
#5606: Fixed internal error when test functions were patched with objects that cannot be compared for truth values against others, like numpy arrays.
#5634: pytest.exit is now correctly handled in unittest cases. This makes unittest cases handle quit from pytest’s pdb correctly.
#5650: Improved output when parsing an ini configuration file fails.
#5701: Fix collection of staticmethod objects defined with functools.partial.
#5734: Skip async generator test functions, and update the warning message to refer to async def functions.

Improved Documentation¶

#5669: Add docstring for Testdir.copy_example.

Trivial/Internal Changes¶

#5095: XML files of the xunit2 family are now validated against the schema by pytest’s own test suite to avoid future regressions.
#5516: Cache node splitting function which can improve collection performance in very large test suites.
#5603: Simplified internal SafeRepr class and removed some dead code.
#5664: When invoking pytest’s own testsuite with PYTHONDONTWRITEBYTECODE=1, the test_xfail_handling test no longer fails.
#5684: Replace manual handling of OSError.errno in the codebase by new OSError subclasses (PermissionError, FileNotFoundError, etc.).

pytest 5.0.1 (2019-07-04)¶

Bug Fixes¶

#5479: Improve quoting in raises match failure message.
#5523: Fixed using multiple short options together in the command-line (for example -vs) in Python 3.8+.
#5547: --step-wise now handles xfail(strict=True) markers properly.

Improved Documentation¶

#5517: Improve “Declaring new hooks” section in chapter “Writing Plugins”

pytest 5.0.0 (2019-06-28)¶

Important¶

This release is a Python3.5+ only release.

For more details, see our Python 2.7 and 3.4 support plan.

Removals¶

#1149: Pytest no longer accepts prefixes of command-line arguments, for example typing pytest --doctest-mod inplace of --doctest-modules. This was previously allowed where the ArgumentParser thought it was unambiguous, but this could be incorrect due to delayed parsing of options for plugins. See for example issues #1149, #3413, and #4009.
#5402: PytestDeprecationWarning are now errors by default.

Following our plan to remove deprecated features with as little disruption as possible, all warnings of type PytestDeprecationWarning now generate errors instead of warning messages.

The affected features will be effectively removed in pytest 5.1, so please consult the Deprecations and Removals section in the docs for directions on how to update existing code.

In the pytest 5.0.X series, it is possible to change the errors back into warnings as a stop gap measure by adding this to your pytest.ini file:
```
[pytest]
filterwarnings =
    ignore::pytest.PytestDeprecationWarning
```
But this will stop working when pytest 5.1 is released.

If you have concerns about the removal of a specific feature, please add a comment to #5402.
#5412: ExceptionInfo objects (returned by pytest.raises) now have the same str representation as repr, which avoids some confusion when users use print(e) to inspect the object.

This means code like:
```
with pytest.raises(SomeException) as e:
    ...
assert "some message" in str(e)
```
Needs to be changed to:
```
with pytest.raises(SomeException) as e:
    ...
assert "some message" in str(e.value)
```

Deprecations¶

#4488: The removal of the --result-log option and module has been postponed to (tentatively) pytest 6.0 as the team has not yet got around to implement a good alternative for it.
#466: The funcargnames attribute has been an alias for fixturenames since pytest 2.3, and is now deprecated in code too.

Features¶

#3457: New pytest_assertion_pass hook, called with context information when an assertion passes.

This hook is still experimental so use it with caution.
#5440: The faulthandler standard library module is now enabled by default to help users diagnose crashes in C modules.

This functionality was provided by integrating the external pytest-faulthandler plugin into the core, so users should remove that plugin from their requirements if used.

For more information see the docs: 故障处理.
#5452: When warnings are configured as errors, pytest warnings now appear as originating from pytest. instead of the internal _pytest.warning_types. module.
#5125: Session.exitcode values are now coded in pytest.ExitCode, an IntEnum. This makes the exit code available for consumer code and are more explicit other than just documentation. User defined exit codes are still valid, but should be used with caution.

The team doesn’t expect this change to break test suites or plugins in general, except in esoteric/specific scenarios.

pytest-xdist users should upgrade to 1.29.0 or later, as pytest-xdist required a compatibility fix because of this change.

Bug Fixes¶

#1403: Switch from imp to importlib.
#1671: The name of the .pyc files cached by the assertion writer now includes the pytest version to avoid stale caches.
#2761: Honor PEP 235 on case-insensitive file systems.
#5078: Test module is no longer double-imported when using --pyargs.

#5260: Improved comparison of byte strings.

When comparing bytes, the assertion message used to show the byte numeric value when showing the differences:

    def test():
>       assert b'spam' == b'eggs'
E       AssertionError: assert b'spam' == b'eggs'
E         At index 0 diff: 115 != 101
E         Use -v to get the full diff

It now shows the actual ascii representation instead, which is often more useful:

    def test():
>       assert b'spam' == b'eggs'
E       AssertionError: assert b'spam' == b'eggs'
E         At index 0 diff: b's' != b'e'
E         Use -v to get the full diff

#5335: Colorize level names when the level in the logging format is formatted using ‘%(levelname).Xs’ (truncated fixed width alignment), where X is an integer.
#5354: Fix pytest.mark.parametrize when the argvalues is an iterator.
#5370: Revert unrolling of all() to fix NameError on nested comprehensions.
#5371: Revert unrolling of all() to fix incorrect handling of generators with if.
#5372: Revert unrolling of all() to fix incorrect assertion when using all() in an expression.
#5383: -q has again an impact on the style of the collected items (--collect-only) when --log-cli-level is used.
#5389: Fix regressions of #5063 for importlib_metadata.PathDistribution which have their files attribute being None.
#5390: Fix regression where the obj attribute of TestCase items was no longer bound to methods.
#5404: Emit a warning when attempting to unwrap a broken object raises an exception, for easier debugging (#5080).
#5432: Prevent “already imported” warnings from assertion rewriter when invoking pytest in-process multiple times.
#5433: Fix assertion rewriting in packages (__init__.py).
#5444: Fix --stepwise mode when the first file passed on the command-line fails to collect.
#5482: Fix bug introduced in 4.6.0 causing collection errors when passing more than 2 positional arguments to pytest.mark.parametrize.
#5505: Fix crash when discovery fails while using -p no:terminal.

Improved Documentation¶

#5315: Expand docs on mocking classes and dictionaries with monkeypatch.
#5416: Fix PytestUnknownMarkWarning in run/skip example.

pytest 4.6.11 (2020-06-04)¶

Bug Fixes¶

#6334: Fix summary entries appearing twice when f/F and s/S report chars were used at the same time in the -r command-line option (for example -rFf).

The upper case variants were never documented and the preferred form should be the lower case.
#7310: Fix UnboundLocalError: local variable 'letter' referenced before assignment in _pytest.terminal.pytest_report_teststatus() when plugins return report objects in an unconventional state.

This was making pytest_report_teststatus() skip entering if-block branches that declare the letter variable.

The fix was to set the initial value of the letter before the if-block cascade so that it always has a value.

pytest 4.6.10 (2020-05-08)¶

Features¶

#6870: New Config.invocation_args attribute containing the unchanged arguments passed to pytest.main().

Remark: while this is technically a new feature and according to our policy it should not have been backported, we have opened an exception in this particular case because it fixes a serious interaction with pytest-xdist, so it can also be considered a bugfix.

Trivial/Internal Changes¶

#6404: Remove usage of parser module, deprecated in Python 3.9.

pytest 4.6.9 (2020-01-04)¶

Bug Fixes¶

#6301: Fix assertion rewriting for egg-based distributions and editable installs (pip install --editable).

pytest 4.6.8 (2019-12-19)¶

Features¶

#5471: JUnit XML now includes a timestamp and hostname in the testsuite tag.

Bug Fixes¶

#5430: junitxml: Logs for failed test are now passed to junit report in case the test fails during call phase.

Trivial/Internal Changes¶

#6345: Pin colorama to 0.4.1 only for Python 3.4 so newer Python versions can still receive colorama updates.

pytest 4.6.7 (2019-12-05)¶

Bug Fixes¶

#5477: The XML file produced by --junitxml now correctly contain a <testsuites> root element.
#6044: Properly ignore FileNotFoundError (OSError.errno == NOENT in Python 2) exceptions when trying to remove old temporary directories, for instance when multiple processes try to remove the same directory (common with pytest-xdist for example).

pytest 4.6.6 (2019-10-11)¶

Bug Fixes¶

#5523: Fixed using multiple short options together in the command-line (for example -vs) in Python 3.8+.
#5537: Replace importlib_metadata backport with importlib.metadata from the standard library on Python 3.8+.
#5806: Fix “lexer” being used when uploading to bpaste.net from --pastebin to “text”.
#5902: Fix warnings about deprecated cmp attribute in attrs>=19.2.

Trivial/Internal Changes¶

#5801: Fixes python version checks (detected by flake8-2020) in case python4 becomes a thing.

pytest 4.6.5 (2019-08-05)¶

Bug Fixes¶

#4344: Fix RuntimeError/StopIteration when trying to collect package with “__init__.py” only.
#5478: Fix encode error when using unicode strings in exceptions with pytest.raises.
#5524: Fix issue where tmp_path and tmpdir would not remove directories containing files marked as read-only, which could lead to pytest crashing when executed a second time with the --basetemp option.
#5547: --step-wise now handles xfail(strict=True) markers properly.
#5650: Improved output when parsing an ini configuration file fails.

pytest 4.6.4 (2019-06-28)¶

Bug Fixes¶

#5404: Emit a warning when attempting to unwrap a broken object raises an exception, for easier debugging (#5080).
#5444: Fix --stepwise mode when the first file passed on the command-line fails to collect.
#5482: Fix bug introduced in 4.6.0 causing collection errors when passing more than 2 positional arguments to pytest.mark.parametrize.
#5505: Fix crash when discovery fails while using -p no:terminal.

pytest 4.6.3 (2019-06-11)¶

Bug Fixes¶

#5383: -q has again an impact on the style of the collected items (--collect-only) when --log-cli-level is used.
#5389: Fix regressions of #5063 for importlib_metadata.PathDistribution which have their files attribute being None.
#5390: Fix regression where the obj attribute of TestCase items was no longer bound to methods.

pytest 4.6.2 (2019-06-03)¶

Bug Fixes¶

#5370: Revert unrolling of all() to fix NameError on nested comprehensions.
#5371: Revert unrolling of all() to fix incorrect handling of generators with if.
#5372: Revert unrolling of all() to fix incorrect assertion when using all() in an expression.

pytest 4.6.1 (2019-06-02)¶

Bug Fixes¶

#5354: Fix pytest.mark.parametrize when the argvalues is an iterator.
#5358: Fix assertion rewriting of all() calls to deal with non-generators.

pytest 4.6.0 (2019-05-31)¶

Important¶

The 4.6.X series will be the last series to support Python 2 and Python 3.4.

For more details, see our Python 2.7 and 3.4 support plan.

Features¶

#4559: Added the junit_log_passing_tests ini value which can be used to enable or disable logging of passing test output in the Junit XML file.
#4956: pytester’s testdir.spawn uses tmpdir as HOME/USERPROFILE directory.
#5062: Unroll calls to all to full for-loops with assertion rewriting for better failure messages, especially when using Generator Expressions.
#5063: Switch from pkg_resources to importlib-metadata for entrypoint detection for improved performance and import time.
#5091: The output for ini options in --help has been improved.
#5269: pytest.importorskip includes the ImportError now in the default reason.
#5311: Captured logs that are output for each failing test are formatted using the ColoredLevelFormatter.
#5312: Improved formatting of multiline log messages in Python 3.

Bug Fixes¶

#2064: The debugging plugin imports the wrapped Pdb class (--pdbcls) on-demand now.
#4908: The pytest_enter_pdb hook gets called with post-mortem (--pdb).
#5036: Fix issue where fixtures dependent on other parametrized fixtures would be erroneously parametrized.
#5256: Handle internal error due to a lone surrogate unicode character not being representable in Jython.
#5257: Ensure that sys.stdout.mode does not include 'b' as it is a text stream.
#5278: Pytest’s internal python plugin can be disabled using -p no:python again.
#5286: Fix issue with disable_test_id_escaping_and_forfeit_all_rights_to_community_support option not working when using a list of test IDs in parametrized tests.
#5330: Show the test module being collected when emitting PytestCollectionWarning messages for test classes with __init__ and __new__ methods to make it easier to pin down the problem.
#5333: Fix regression in 4.5.0 with --lf not re-running all tests with known failures from non-selected tests.

Improved Documentation¶

#5250: Expand docs on use of setenv and delenv with monkeypatch.

pytest 4.5.0 (2019-05-11)¶

Features¶

#4826: A warning is now emitted when unknown marks are used as a decorator. This is often due to a typo, which can lead to silently broken tests.
#4907: Show XFail reason as part of JUnitXML message field.
#5013: Messages from crash reports are displayed within test summaries now, truncated to the terminal width.
#5023: New flag --strict-markers that triggers an error when unknown markers (e.g. those not registered using the markers option in the configuration file) are used in the test suite.

The existing --strict option has the same behavior currently, but can be augmented in the future for additional checks.
#5026: Assertion failure messages for sequences and dicts contain the number of different items now.
#5034: Improve reporting with --lf and --ff (run-last-failure).
#5035: The --cache-show option/action accepts an optional glob to show only matching cache entries.
#5059: Standard input (stdin) can be given to pytester’s Testdir.run() and Testdir.popen().
#5068: The -r option learnt about A to display all reports (including passed ones) in the short test summary.
#5108: The short test summary is displayed after passes with output (-rP).
#5172: The --last-failed (--lf) option got smarter and will now skip entire files if all tests of that test file have passed in previous runs, greatly speeding up collection.
#5177: Introduce new specific warning PytestWarning subclasses to make it easier to filter warnings based on the class, rather than on the message. The new subclasses are:
- PytestAssertRewriteWarning
- PytestCacheWarning
- PytestCollectionWarning
- PytestConfigWarning
- PytestUnhandledCoroutineWarning
- PytestUnknownMarkWarning
#5202: New record_testsuite_property session-scoped fixture allows users to log <property> tags at the testsuite level with the junitxml plugin.

The generated XML is compatible with the latest xunit standard, contrary to the properties recorded by record_property and record_xml_attribute.
#5214: The default logging format has been changed to improve readability. Here is an example of a previous logging message:
```
test_log_cli_enabled_disabled.py    3 CRITICAL critical message logged by test
```
This has now become:
```
CRITICAL root:test_log_cli_enabled_disabled.py:3 critical message logged by test
```
The formatting can be changed through the log_format configuration option.
#5220: --fixtures now also shows fixture scope for scopes other than "function".

Bug Fixes¶

#5113: Deselected items from plugins using pytest_collect_modifyitems as a hookwrapper are correctly reported now.
#5144: With usage errors exitstatus is set to EXIT_USAGEERROR in the pytest_sessionfinish hook now as expected.
#5235: outcome.exit is not used with EOF in the pdb wrapper anymore, but only with quit.

Improved Documentation¶

#4935: Expand docs on registering marks and the effect of --strict.

Trivial/Internal Changes¶

#4942: logging.raiseExceptions is not set to False anymore.
#5013: pytest now depends on wcwidth to properly track unicode character sizes for more precise terminal output.
#5059: pytester’s Testdir.popen() uses stdout and stderr via keyword arguments with defaults now (subprocess.PIPE).
#5069: The code for the short test summary in the terminal was moved to the terminal plugin.
#5082: Improved validation of kwargs for various methods in the pytester plugin.
#5202: record_property now emits a PytestWarning when used with junit_family=xunit2: the fixture generates property tags as children of testcase, which is not permitted according to the most recent schema.
#5239: Pin pluggy to < 1.0 so we don’t update to 1.0 automatically when it gets released: there are planned breaking changes, and we want to ensure pytest properly supports pluggy 1.0.

pytest 4.4.2 (2019-05-08)¶

Bug Fixes¶

#5089: Fix crash caused by error in __repr__ function with both showlocals and verbose output enabled.
#5139: Eliminate core dependency on ‘terminal’ plugin.
#5229: Require pluggy>=0.11.0 which reverts a dependency to importlib-metadata added in 0.10.0. The importlib-metadata package cannot be imported when installed as an egg and causes issues when relying on setup.py to install test dependencies.

Improved Documentation¶

#5171: Doc: pytest_ignore_collect, pytest_collect_directory, pytest_collect_file and pytest_pycollect_makemodule hooks’s ‘path’ parameter documented type is now py.path.local
#5188: Improve help for --runxfail flag.

Trivial/Internal Changes¶

#5182: Removed internal and unused _pytest.deprecated.MARK_INFO_ATTRIBUTE.

pytest 4.4.1 (2019-04-15)¶

Bug Fixes¶

#5031: Environment variables are properly restored when using pytester’s testdir fixture.
#5039: Fix regression with --pdbcls, which stopped working with local modules in 4.0.0.
#5092: Produce a warning when unknown keywords are passed to pytest.param(...).
#5098: Invalidate import caches with monkeypatch.syspath_prepend, which is required with namespace packages being used.

pytest 4.4.0 (2019-03-29)¶

Features¶

#2224: async test functions are skipped and a warning is emitted when a suitable async plugin is not installed (such as pytest-asyncio or pytest-trio).

Previously async functions would not execute at all but still be marked as “passed”.
#2482: Include new disable_test_id_escaping_and_forfeit_all_rights_to_community_support option to disable ascii-escaping in parametrized values. This may cause a series of problems and as the name makes clear, use at your own risk.
#4718: The -p option can now be used to early-load plugins also by entry-point name, instead of just by module name.

This makes it possible to early load external plugins like pytest-cov in the command-line:
```
pytest -p pytest_cov
```
#4855: The --pdbcls option handles classes via module attributes now (e.g. pdb:pdb.Pdb with pdbpp), and its validation was improved.
#4875: The testpaths configuration option is now displayed next to the rootdir and inifile lines in the pytest header if the option is in effect, i.e., directories or file names were not explicitly passed in the command line.

Also, inifile is only displayed if there’s a configuration file, instead of an empty inifile: string.
#4911: Doctests can be skipped now dynamically using pytest.skip().
#4920: Internal refactorings have been made in order to make the implementation of the pytest-subtests plugin possible, which adds unittest sub-test support and a new subtests fixture as discussed in #1367.

For details on the internal refactorings, please see the details on the related PR.
#4931: pytester’s LineMatcher asserts that the passed lines are a sequence.
#4936: Handle -p plug after -p no:plug.

This can be used to override a blocked plugin (e.g. in “addopts”) from the command line etc.
#4951: Output capturing is handled correctly when only capturing via fixtures (capsys, capfs) with pdb.set_trace().
#4956: pytester sets $HOME and $USERPROFILE to the temporary directory during test runs.

This ensures to not load configuration files from the real user’s home directory.
#4980: Namespace packages are handled better with monkeypatch.syspath_prepend and testdir.syspathinsert (via pkg_resources.fixup_namespace_packages).
#4993: The stepwise plugin reports status information now.
#5008: If a setup.cfg file contains [tool:pytest] and also the no longer supported [pytest] section, pytest will use [tool:pytest] ignoring [pytest]. Previously it would unconditionally error out.

This makes it simpler for plugins to support old pytest versions.

Bug Fixes¶

#1895: Fix bug where fixtures requested dynamically via request.getfixturevalue() might be teardown before the requesting fixture.
#4851: pytester unsets PYTEST_ADDOPTS now to not use outer options with testdir.runpytest().
#4903: Use the correct modified time for years after 2038 in rewritten .pyc files.
#4928: Fix line offsets with ScopeMismatch errors.
#4957: -p no:plugin is handled correctly for default (internal) plugins now, e.g. with -p no:capture.

Previously they were loaded (imported) always, making e.g. the capfd fixture available.
#4968: The pdb quit command is handled properly when used after the debug command with pdbpp.
#4975: Fix the interpretation of -qq option where it was being considered as -v instead.
#4978: outcomes.Exit is not swallowed in assertrepr_compare anymore.
#4988: Close logging’s file handler explicitly when the session finishes.
#5003: Fix line offset with mark collection error (off by one).

Improved Documentation¶

#4974: Update docs for pytest_cmdline_parse hook to note availability limitations

Trivial/Internal Changes¶

#4718: pluggy>=0.9 is now required.
#4815: funcsigs>=1.0 is now required for Python 2.7.
#4829: Some left-over internal code related to yield tests has been removed.
#4890: Remove internally unused anypython fixture from the pytester plugin.
#4912: Remove deprecated Sphinx directive, add_description_unit(), pin sphinx-removed-in to >= 0.2.0 to support Sphinx 2.0.
#4913: Fix pytest tests invocation with custom PYTHONPATH.
#4965: New pytest_report_to_serializable and pytest_report_from_serializable experimental hooks.

These hooks will be used by pytest-xdist, pytest-subtests, and the replacement for resultlog to serialize and customize reports.

They are experimental, meaning that their details might change or even be removed completely in future patch releases without warning.

Feedback is welcome from plugin authors and users alike.
#4987: Collector.repr_failure respects the --tb option, but only defaults to short now (with auto).

pytest 4.3.1 (2019-03-11)¶

Bug Fixes¶

#4810: Logging messages inside pytest_runtest_logreport() are now properly captured and displayed.
#4861: Improve validation of contents written to captured output so it behaves the same as when capture is disabled.
#4898: Fix AttributeError: FixtureRequest has no 'confg' attribute bug in testdir.copy_example.

Trivial/Internal Changes¶

#4768: Avoid pkg_resources import at the top-level.

pytest 4.3.0 (2019-02-16)¶

Deprecations¶

#4724: pytest.warns() now emits a warning when it receives unknown keyword arguments.

This will be changed into an error in the future.

Features¶

#2753: Usage errors from argparse are mapped to pytest’s UsageError.
#3711: Add the --ignore-glob parameter to exclude test-modules with Unix shell-style wildcards. Add the collect_ignore_glob for conftest.py to exclude test-modules with Unix shell-style wildcards.
#4698: The warning about Python 2.7 and 3.4 not being supported in pytest 5.0 has been removed.

In the end it was considered to be more of a nuisance than actual utility and users of those Python versions shouldn’t have problems as pip will not install pytest 5.0 on those interpreters.
#4707: With the help of new set_log_path() method there is a way to set log_file paths from hooks.

Bug Fixes¶

#4651: --help and --version are handled with UsageError.
#4782: Fix AssertionError with collection of broken symlinks with packages.

pytest 4.2.1 (2019-02-12)¶

Bug Fixes¶

#2895: The pytest_report_collectionfinish hook now is also called with --collect-only.
#3899: Do not raise UsageError when an imported package has a pytest_plugins.py child module.
#4347: Fix output capturing when using pdb++ with recursive debugging.
#4592: Fix handling of collect_ignore via parent conftest.py.
#4700: Fix regression where setUpClass would always be called in subclasses even if all tests were skipped by a unittest.skip() decorator applied in the subclass.
#4739: Fix parametrize(... ids=<function>) when the function returns non-strings.
#4745: Fix/improve collection of args when passing in __init__.py and a test file.
#4770: more_itertools is now constrained to <6.0.0 when required for Python 2.7 compatibility.
#526: Fix “ValueError: Plugin already registered” exceptions when running in build directories that symlink to actual source.

Improved Documentation¶

#3899: Add note to plugins.rst that pytest_plugins should not be used as a name for a user module containing plugins.
#4324: Document how to use raises and does_not_raise to write parametrized tests with conditional raises.
#4709: Document how to customize test failure messages when using pytest.warns.

Trivial/Internal Changes¶

#4741: Some verbosity related attributes of the TerminalReporter plugin are now read only properties.

pytest 4.2.0 (2019-01-30)¶

Features¶

#3094: Classic xunit-style functions and methods now obey the scope of autouse fixtures.

This fixes a number of surprising issues like setup_method being called before session-scoped autouse fixtures (see #517 for an example).
#4627: Display a message at the end of the test session when running under Python 2.7 and 3.4 that pytest 5.0 will no longer support those Python versions.
#4660: The number of selected tests now are also displayed when the -k or -m flags are used.
#4688: pytest_report_teststatus hook now can also receive a config parameter.
#4691: pytest_terminal_summary hook now can also receive a config parameter.

Bug Fixes¶

#3547: --junitxml can emit XML compatible with Jenkins xUnit. junit_family INI option accepts legacy|xunit1, which produces old style output, and xunit2 that conforms more strictly to https://github.com/jenkinsci/xunit-plugin/blob/xunit-2.3.2/src/main/resources/org/jenkinsci/plugins/xunit/types/model/xsd/junit-10.xsd
#4280: Improve quitting from pdb, especially with --trace.

Using q[quit] after pdb.set_trace() will quit pytest also.
#4402: Warning summary now groups warnings by message instead of by test id.

This makes the output more compact and better conveys the general idea of how much code is actually generating warnings, instead of how many tests call that code.
#4536: monkeypatch.delattr handles class descriptors like staticmethod/classmethod.
#4649: Restore marks being considered keywords for keyword expressions.
#4653: tmp_path fixture and other related ones provides resolved path (a.k.a real path)
#4667: pytest_terminal_summary uses result from pytest_report_teststatus hook, rather than hardcoded strings.
#4669: Correctly handle unittest.SkipTest exception containing non-ascii characters on Python 2.
#4680: Ensure the tmpdir and the tmp_path fixtures are the same folder.
#4681: Ensure tmp_path is always a real path.

Trivial/Internal Changes¶

#4643: Use a.item() instead of the deprecated np.asscalar(a) in pytest.approx.

np.asscalar has been deprecated in numpy 1.16..
#4657: Copy saferepr from pylib
#4668: The verbose word for expected failures in the teststatus report changes from xfail to XFAIL to be consistent with other test outcomes.

pytest 4.1.1 (2019-01-12)¶

Bug Fixes¶

#2256: Show full repr with assert a==b and -vv.
#3456: Extend Doctest-modules to ignore mock objects.
#4617: Fixed pytest.warns bug when context manager is reused (e.g. multiple parametrization).
#4631: Don’t rewrite assertion when __getattr__ is broken

Improved Documentation¶

#3375: Document that using setup.cfg may crash other tools or cause hard to track down problems because it uses a different parser than pytest.ini or tox.ini files.

Trivial/Internal Changes¶

#4602: Uninstall hypothesis in regen tox env.

pytest 4.1.0 (2019-01-05)¶

Removals¶

#2169: pytest.mark.parametrize: in previous versions, errors raised by id functions were suppressed and changed into warnings. Now the exceptions are propagated, along with a pytest message informing the node, parameter value and index where the exception occurred.
#3078: Remove legacy internal warnings system: config.warn, Node.warn. The pytest_logwarning now issues a warning when implemented.

See our docs on information on how to update your code.
#3079: Removed support for yield tests - they are fundamentally broken because they don’t support fixtures properly since collection and test execution were separated.

See our docs on information on how to update your code.
#3082: Removed support for applying marks directly to values in @pytest.mark.parametrize. Use pytest.param instead.

See our docs on information on how to update your code.
#3083: Removed Metafunc.addcall. This was the predecessor mechanism to @pytest.mark.parametrize.

See our docs on information on how to update your code.
#3085: Removed support for passing strings to pytest.main. Now, always pass a list of strings instead.

See our docs on information on how to update your code.
#3086: [pytest] section in setup.cfg files is no longer supported, use [tool:pytest] instead. setup.cfg files are meant for use with distutils, and a section named pytest has notoriously been a source of conflicts and bugs.

Note that for pytest.ini and tox.ini files the section remains [pytest].
#3616: Removed the deprecated compat properties for node.Class/Function/Module - use pytest.Class/Function/Module now.

See our docs on information on how to update your code.
#4421: Removed the implementation of the pytest_namespace hook.

See our docs on information on how to update your code.
#4489: Removed request.cached_setup. This was the predecessor mechanism to modern fixtures.

See our docs on information on how to update your code.
#4535: Removed the deprecated PyCollector.makeitem method. This method was made public by mistake a long time ago.
#4543: Removed support to define fixtures using the pytest_funcarg__ prefix. Use the @pytest.fixture decorator instead.

See our docs on information on how to update your code.
#4545: Calling fixtures directly is now always an error instead of a warning.

See our docs on information on how to update your code.
#4546: Remove Node.get_marker(name) the return value was not usable for more than an existence check.

Use Node.get_closest_marker(name) as a replacement.
#4547: The deprecated record_xml_property fixture has been removed, use the more generic record_property instead.

See our docs for more information.
#4548: An error is now raised if the pytest_plugins variable is defined in a non-top-level conftest.py file (i.e., not residing in the rootdir).

See our docs for more information.
#891: Remove testfunction.markername attributes - use Node.iter_markers(name=None) to iterate them.

Deprecations¶

#3050: Deprecated the pytest.config global.

See pytest.config global for rationale.
#3974: Passing the message parameter of pytest.raises now issues a DeprecationWarning.

It is a common mistake to think this parameter will match the exception message, while in fact it only serves to provide a custom message in case the pytest.raises check fails. To avoid this mistake and because it is believed to be little used, pytest is deprecating it without providing an alternative for the moment.

If you have concerns about this, please comment on #3974.
#4435: Deprecated raises(..., 'code(as_a_string)') and warns(..., 'code(as_a_string)').

See raises / warns with a string as the second argument for rationale and examples.

Features¶

#3191: A warning is now issued when assertions are made for None.

This is a common source of confusion among new users, which write:
```
assert mocked_object.assert_called_with(3, 4, 5, key="value")
```
When they should write:
```
mocked_object.assert_called_with(3, 4, 5, key="value")
```
Because the assert_called_with method of mock objects already executes an assertion.

This warning will not be issued when None is explicitly checked. An assertion like:
```
assert variable is None
```
will not issue the warning.
#3632: Richer equality comparison introspection on AssertionError for objects created using attrs or dataclasses (Python 3.7+, backported to 3.6).
#4278: CACHEDIR.TAG files are now created inside cache directories.

Those files are part of the Cache Directory Tagging Standard, and can be used by backup or synchronization programs to identify pytest’s cache directory as such.
#4292: pytest.outcomes.Exit is derived from SystemExit instead of KeyboardInterrupt. This allows us to better handle pdb exiting.
#4371: Updated the --collect-only option to display test descriptions when ran using --verbose.
#4386: Restructured ExceptionInfo object construction and ensure incomplete instances have a repr/str.
#4416: pdb: added support for keyword arguments with pdb.set_trace.

It handles header similar to Python 3.7 does it, and forwards any other keyword arguments to the Pdb constructor.

This allows for __import__("pdb").set_trace(skip=["foo.*"]).
#4483: Added ini parameter junit_duration_report to optionally report test call durations, excluding setup and teardown times.

The JUnit XML specification and the default pytest behavior is to include setup and teardown times in the test duration report. You can include just the call durations instead (excluding setup and teardown) by adding this to your pytest.ini file:
```
[pytest]
junit_duration_report = call
```
#4532: -ra now will show errors and failures last, instead of as the first items in the summary.

This makes it easier to obtain a list of errors and failures to run tests selectively.
#4599: pytest.importorskip now supports a reason parameter, which will be shown when the requested module cannot be imported.

Bug Fixes¶

#3532: -p now accepts its argument without a space between the value, for example -pmyplugin.
#4327: approx again works with more generic containers, more precisely instances of Iterable and Sized instead of more restrictive Sequence.
#4397: Ensure that node ids are printable.
#4435: Fixed raises(..., 'code(string)') frame filename.
#4458: Display actual test ids in --collect-only.

Improved Documentation¶

#4557: Markers example documentation page updated to support latest pytest version.
#4558: Update cache documentation example to correctly show cache hit and miss.
#4580: Improved detailed summary report documentation.

Trivial/Internal Changes¶

#4447: Changed the deprecation type of --result-log to PytestDeprecationWarning.

It was decided to remove this feature at the next major revision.

pytest 4.0.2 (2018-12-13)¶

Bug Fixes¶

#4265: Validate arguments from the PYTEST_ADDOPTS environment variable and the addopts ini option separately.
#4435: Fix raises(..., 'code(string)') frame filename.
#4500: When a fixture yields and a log call is made after the test runs, and, if the test is interrupted, capture attributes are None.
#4538: Raise TypeError for with raises(..., match=<non-None falsey value>).

Improved Documentation¶

#1495: Document common doctest fixture directory tree structure pitfalls

pytest 4.0.1 (2018-11-23)¶

Bug Fixes¶

#3952: Display warnings before “short test summary info” again, but still later warnings in the end.
#4386: Handle uninitialized exceptioninfo in repr/str.
#4393: Do not create .gitignore/README.md files in existing cache directories.
#4400: Rearrange warning handling for the yield test errors so the opt-out in 4.0.x correctly works.
#4405: Fix collection of testpaths with --pyargs.
#4412: Fix assertion rewriting involving Starred + side-effects.
#4425: Ensure we resolve the absolute path when the given --basetemp is a relative path.

Trivial/Internal Changes¶

#4315: Use pkg_resources.parse_version instead of LooseVersion in minversion check.
#4440: Adjust the stack level of some internal pytest warnings.

pytest 4.0.0 (2018-11-13)¶

Removals¶

#3737: RemovedInPytest4Warnings are now errors by default.

Following our plan to remove deprecated features with as little disruption as possible, all warnings of type RemovedInPytest4Warnings now generate errors instead of warning messages.

The affected features will be effectively removed in pytest 4.1, so please consult the Deprecations and Removals section in the docs for directions on how to update existing code.

In the pytest 4.0.X series, it is possible to change the errors back into warnings as a stop gap measure by adding this to your pytest.ini file:
```
[pytest]
filterwarnings =
    ignore::pytest.RemovedInPytest4Warning
```
But this will stop working when pytest 4.1 is released.

If you have concerns about the removal of a specific feature, please add a comment to #4348.
#4358: Remove the ::() notation to denote a test class instance in node ids.

Previously, node ids that contain test instances would use ::() to denote the instance like this:
```
test_foo.py::Test::()::test_bar
```
The extra ::() was puzzling to most users and has been removed, so that the test id becomes now:
```
test_foo.py::Test::test_bar
```
This change could not accompany a deprecation period as is usual when user-facing functionality changes because it was not really possible to detect when the functionality was being used explicitly.

The extra ::() might have been removed in some places internally already, which then led to confusion in places where it was expected, e.g. with --deselect (#4127).

Test class instances are also not listed with --collect-only anymore.

Features¶

#4270: The cache_dir option uses $TOX_ENV_DIR as prefix (if set in the environment).

This uses a different cache per tox environment by default.

Bug Fixes¶

#3554: Fix CallInfo.__repr__ for when the call is not finished yet.

pytest 3.10.1 (2018-11-11)¶

Bug Fixes¶

#4287: Fix nested usage of debugging plugin (pdb), e.g. with pytester’s testdir.runpytest.
#4304: Block the stepwise plugin if cacheprovider is also blocked, as one depends on the other.
#4306: Parse minversion as an actual version and not as dot-separated strings.
#4310: Fix duplicate collection due to multiple args matching the same packages.
#4321: Fix item.nodeid with resolved symlinks.
#4325: Fix collection of direct symlinked files, where the target does not match python_files.
#4329: Fix TypeError in report_collect with _collect_report_last_write.

Trivial/Internal Changes¶

#4305: Replace byte/unicode helpers in test_capture with python level syntax.

pytest 3.10.0 (2018-11-03)¶

Features¶

#2619: Resume capturing output after continue with __import__("pdb").set_trace().

This also adds a new pytest_leave_pdb hook, and passes in pdb to the existing pytest_enter_pdb hook.
#4147: Add --sw, --stepwise as an alternative to --lf -x for stopping at the first failure, but starting the next test invocation from that test. See the documentation for more info.
#4188: Make --color emit colorful dots when not running in verbose mode. Earlier, it would only colorize the test-by-test output if --verbose was also passed.
#4225: Improve performance with collection reporting in non-quiet mode with terminals.

The “collecting …” message is only printed/updated every 0.5s.

Bug Fixes¶

#2701: Fix false RemovedInPytest4Warning: usage of Session... is deprecated, please use pytest warnings.
#4046: Fix problems with running tests in package __init__.py files.
#4260: Swallow warnings during anonymous compilation of source.
#4262: Fix access denied error when deleting stale directories created by tmpdir / tmp_path.
#611: Naming a fixture request will now raise a warning: the request fixture is internal and should not be overwritten as it will lead to internal errors.
#4266: Handle (ignore) exceptions raised during collection, e.g. with Django’s LazySettings proxy class.

Improved Documentation¶

#4255: Added missing documentation about the fact that module names passed to filter warnings are not regex-escaped.

Trivial/Internal Changes¶

#4272: Display cachedir also in non-verbose mode if non-default.
#4277: pdb: improve message about output capturing with set_trace.

Do not display “IO-capturing turned off/on” when -s is used to avoid confusion.
#4279: Improve message and stack level of warnings issued by monkeypatch.setenv when the value of the environment variable is not a str.

pytest 3.9.3 (2018-10-27)¶

Bug Fixes¶

#4174: Fix “ValueError: Plugin already registered” with conftest plugins via symlink.
#4181: Handle race condition between creation and deletion of temporary folders.
#4221: Fix bug where the warning summary at the end of the test session was not showing the test where the warning was originated.
#4243: Fix regression when stacklevel for warnings was passed as positional argument on python2.

Improved Documentation¶

#3851: Add reference to empty_parameter_set_mark ini option in documentation of @pytest.mark.parametrize

Trivial/Internal Changes¶

#4028: Revert patching of sys.breakpointhook since it appears to do nothing.
#4233: Apply an import sorter (reorder-python-imports) to the codebase.
#4248: Remove use of unnecessary compat shim, six.binary_type

pytest 3.9.2 (2018-10-22)¶

Bug Fixes¶

#2909: Improve error message when a recursive dependency between fixtures is detected.
#3340: Fix logging messages not shown in hooks pytest_sessionstart() and pytest_sessionfinish().
#3533: Fix unescaped XML raw objects in JUnit report for skipped tests
#3691: Python 2: safely format warning message about passing unicode strings to warnings.warn, which may cause surprising MemoryError exception when monkey patching warnings.warn itself.
#4026: Improve error message when it is not possible to determine a function’s signature.
#4177: Pin setuptools>=40.0 to support py_modules in setup.cfg
#4179: Restore the tmpdir behaviour of symlinking the current test run.
#4192: Fix filename reported by warnings.warn when using recwarn under python2.

pytest 3.9.1 (2018-10-16)¶

Features¶

#4159: For test-suites containing test classes, the information about the subclassed module is now output only if a higher verbosity level is specified (at least “-vv”).

pytest 3.9.0 (2018-10-15 - not published due to a release automation bug)¶

Deprecations¶

#3616: The following accesses have been documented as deprecated for years, but are now actually emitting deprecation warnings.
- Access of Module, Function, Class, Instance, File and Item through Node instances. Now users will this warning:
```
usage of Function.Module is deprecated, please use pytest.Module instead
```
  Users should just import pytest and access those objects using the pytest module.
- request.cached_setup, this was the precursor of the setup/teardown mechanism available to fixtures. You can consult funcarg comparison section in the docs.
- Using objects named "Class" as a way to customize the type of nodes that are collected in Collector subclasses has been deprecated. Users instead should use pytest_collect_make_item to customize node types during collection.
  
  This issue should affect only advanced plugins who create new collection types, so if you see this warning message please contact the authors so they can change the code.
- The warning that produces the message below has changed to RemovedInPytest4Warning:
```
getfuncargvalue is deprecated, use getfixturevalue
```
#3988: Add a Deprecation warning for pytest.ensuretemp as it was deprecated since a while.

Features¶

#2293: Improve usage errors messages by hiding internal details which can be distracting and noisy.

This has the side effect that some error conditions that previously raised generic errors (such as ValueError for unregistered marks) are now raising Failed exceptions.
#3332: Improve the error displayed when a conftest.py file could not be imported.

In order to implement this, a new chain parameter was added to ExceptionInfo.getrepr to show or hide chained tracebacks in Python 3 (defaults to True).
#3849: Add empty_parameter_set_mark=fail_at_collect ini option for raising an exception when parametrize collects an empty set.
#3964: Log messages generated in the collection phase are shown when live-logging is enabled and/or when they are logged to a file.
#3985: Introduce tmp_path as a fixture providing a Path object. Also introduce tmp_path_factory as a session-scoped fixture for creating arbitrary temporary directories from any other fixture or test.
#4013: Deprecation warnings are now shown even if you customize the warnings filters yourself. In the previous version any customization would override pytest’s filters and deprecation warnings would fall back to being hidden by default.
#4073: Allow specification of timeout for Testdir.runpytest_subprocess() and Testdir.run().
#4098: Add returncode argument to pytest.exit() to exit pytest with a specific return code.
#4102: Reimplement pytest.deprecated_call using pytest.warns so it supports the match='...' keyword argument.

This has the side effect that pytest.deprecated_call now raises pytest.fail.Exception instead of AssertionError.
#4149: Require setuptools>=30.3 and move most of the metadata to setup.cfg.

Bug Fixes¶

#2535: Improve error message when test functions of unittest.TestCase subclasses use a parametrized fixture.
#3057: request.fixturenames now correctly returns the name of fixtures created by request.getfixturevalue().
#3946: Warning filters passed as command line options using -W now take precedence over filters defined in ini configuration files.
#4066: Fix source reindenting by using textwrap.dedent directly.
#4102: pytest.warn will capture previously-warned warnings in Python 2. Previously they were never raised.
#4108: Resolve symbolic links for args.

This fixes running pytest tests/test_foo.py::test_bar, where tests is a symlink to project/app/tests: previously project/app/conftest.py would be ignored for fixtures then.
#4132: Fix duplicate printing of internal errors when using --pdb.
#4135: pathlib based tmpdir cleanup now correctly handles symlinks in the folder.
#4152: Display the filename when encountering SyntaxWarning.

Improved Documentation¶

#3713: Update usefixtures documentation to clarify that it can’t be used with fixture functions.
#4058: Update fixture documentation to specify that a fixture can be invoked twice in the scope it’s defined for.
#4064: According to unittest.rst, setUpModule and tearDownModule were not implemented, but it turns out they are. So updated the documentation for unittest.
#4151: Add tempir testing example to CONTRIBUTING.rst guide

Trivial/Internal Changes¶

#2293: The internal MarkerError exception has been removed.
#3988: Port the implementation of tmpdir to pathlib.
#4063: Exclude 0.00 second entries from --duration output unless -vv is passed on the command-line.
#4093: Fixed formatting of string literals in internal tests.

pytest 3.8.2 (2018-10-02)¶

Deprecations and Removals¶

#4036: The item parameter of pytest_warning_captured hook is now documented as deprecated. We realized only after the 3.8 release that this parameter is incompatible with pytest-xdist.

Our policy is to not deprecate features during bug-fix releases, but in this case we believe it makes sense as we are only documenting it as deprecated, without issuing warnings which might potentially break test suites. This will get the word out that hook implementers should not use this parameter at all.

In a future release item will always be None and will emit a proper warning when a hook implementation makes use of it.

Bug Fixes¶

#3539: Fix reload on assertion rewritten modules.
#4034: The .user_properties attribute of TestReport objects is a list of (name, value) tuples, but could sometimes be instantiated as a tuple of tuples. It is now always a list.
#4039: No longer issue warnings about using pytest_plugins in non-top-level directories when using --pyargs: the current --pyargs mechanism is not reliable and might give false negatives.
#4040: Exclude empty reports for passed tests when -rP option is used.
#4051: Improve error message when an invalid Python expression is passed to the -m option.
#4056: MonkeyPatch.setenv and MonkeyPatch.delenv issue a warning if the environment variable name is not str on Python 2.

In Python 2, adding unicode keys to os.environ causes problems with subprocess (and possible other modules), making this a subtle bug specially susceptible when used with from __future__ import unicode_literals.

Improved Documentation¶

#3928: Add possible values for fixture scope to docs.

pytest 3.8.1 (2018-09-22)¶

Bug Fixes¶

#3286: .pytest_cache directory is now automatically ignored by Git. Users who would like to contribute a solution for other SCMs please consult/comment on this issue.
#3749: Fix the following error during collection of tests inside packages:
```
TypeError: object of type 'Package' has no len()
```
#3941: Fix bug where indirect parametrization would consider the scope of all fixtures used by the test function to determine the parametrization scope, and not only the scope of the fixtures being parametrized.
#3973: Fix crash of the assertion rewriter if a test changed the current working directory without restoring it afterwards.
#3998: Fix issue that prevented some caplog properties (for example record_tuples) from being available when entering the debugger with --pdb.
#3999: Fix UnicodeDecodeError in python2.x when a class returns a non-ascii binary __repr__ in an assertion which also contains non-ascii text.

Improved Documentation¶

#3996: New Deprecations and Removals page shows all currently deprecated features, the rationale to do so, and alternatives to update your code. It also list features removed from pytest in past major releases to help those with ancient pytest versions to upgrade.

Trivial/Internal Changes¶

#3955: Improve pre-commit detection for changelog filenames
#3975: Remove legacy code around im_func as that was python2 only

pytest 3.8.0 (2018-09-05)¶

Deprecations and Removals¶

#2452: Config.warn and Node.warn have been deprecated, see Config.warn and Node.warn for rationale and examples.
#3936: @pytest.mark.filterwarnings second parameter is no longer regex-escaped, making it possible to actually use regular expressions to check the warning message.

Note: regex-escaping the match string was an implementation oversight that might break test suites which depend on the old behavior.

Features¶

#2452: Internal pytest warnings are now issued using the standard warnings module, making it possible to use the standard warnings filters to manage those warnings. This introduces PytestWarning, PytestDeprecationWarning and RemovedInPytest4Warning warning types as part of the public API.

Consult the documentation for more info.
#2908: DeprecationWarning and PendingDeprecationWarning are now shown by default if no other warning filter is configured. This makes pytest more compliant with PEP 506#recommended-filter-settings-for-test-runners. See the docs for more info.
#3251: Warnings are now captured and displayed during test collection.
#3784: PYTEST_DISABLE_PLUGIN_AUTOLOAD environment variable disables plugin auto-loading when set.
#3829: Added the count option to console_output_style to enable displaying the progress as a count instead of a percentage.
#3837: Added support for ‘xfailed’ and ‘xpassed’ outcomes to the pytester.RunResult.assert_outcomes signature.

Bug Fixes¶

#3911: Terminal writer now takes into account unicode character width when writing out progress.
#3913: Pytest now returns with correct exit code (EXIT_USAGEERROR, 4) when called with unknown arguments.
#3918: Improve performance of assertion rewriting.

Improved Documentation¶

#3566: Added a blurb in usage.rst for the usage of -r flag which is used to show an extra test summary info.
#3907: Corrected type of the exceptions collection passed to xfail: raises argument accepts a tuple instead of list.

Trivial/Internal Changes¶

#3853: Removed "run all (no recorded failures)" message printed with --failed-first and --last-failed when there are no failed tests.

pytest 3.7.4 (2018-08-29)¶

Bug Fixes¶

#3506: Fix possible infinite recursion when writing .pyc files.
#3853: Cache plugin now obeys the -q flag when --last-failed and --failed-first flags are used.
#3883: Fix bad console output when using console_output_style=classic.
#3888: Fix macOS specific code using capturemanager plugin in doctests.

Improved Documentation¶

#3902: Fix pytest.org links

pytest 3.7.3 (2018-08-26)¶

Bug Fixes¶

#3033: Fixtures during teardown can again use capsys and capfd to inspect output captured during tests.
#3773: Fix collection of tests from __init__.py files if they match the python_files configuration option.
#3796: Fix issue where teardown of fixtures of consecutive sub-packages were executed once, at the end of the outer package.
#3816: Fix bug where --show-capture=no option would still show logs printed during fixture teardown.
#3819: Fix stdout/stderr not getting captured when real-time cli logging is active.
#3843: Fix collection error when specifying test functions directly in the command line using test.py::test syntax together with --doctest-modules.
#3848: Fix bugs where unicode arguments could not be passed to testdir.runpytest on Python 2.
#3854: Fix double collection of tests within packages when the filename starts with a capital letter.

Improved Documentation¶

#3824: Added example for multiple glob pattern matches in python_files.
#3833: Added missing docs for pytester.Testdir.
#3870: Correct documentation for setuptools integration.

Trivial/Internal Changes¶

#3826: Replace broken type annotations with type comments.
#3845: Remove a reference to issue #568 from the documentation, which has since been fixed.

pytest 3.7.2 (2018-08-16)¶

Bug Fixes¶

#3671: Fix filterwarnings not being registered as a builtin mark.
#3768, #3789: Fix test collection from packages mixed with normal directories.
#3771: Fix infinite recursion during collection if a pytest_ignore_collect hook returns False instead of None.
#3774: Fix bug where decorated fixtures would lose functionality (for example @mock.patch).
#3775: Fix bug where importing modules or other objects with prefix pytest_ prefix would raise a PluginValidationError.
#3788: Fix AttributeError during teardown of TestCase subclasses which raise an exception during __init__.
#3804: Fix traceback reporting for exceptions with __cause__ cycles.

Improved Documentation¶

#3746: Add documentation for metafunc.config that had been mistakenly hidden.

pytest 3.7.1 (2018-08-02)¶

Bug Fixes¶

#3473: Raise immediately if approx() is given an expected value of a type it doesn’t understand (e.g. strings, nested dicts, etc.).
#3712: Correctly represent the dimensions of a numpy array when calling repr() on approx().
#3742: Fix incompatibility with third party plugins during collection, which produced the error object has no attribute '_collectfile'.
#3745: Display the absolute path if cache_dir is not relative to the rootdir instead of failing.
#3747: Fix compatibility problem with plugins and the warning code issued by fixture functions when they are called directly.
#3748: Fix infinite recursion in pytest.approx with arrays in numpy<1.13.
#3757: Pin pathlib2 to >=2.2.0 as we require __fspath__ support.
#3763: Fix TypeError when the assertion message is bytes in python 3.

pytest 3.7.0 (2018-07-30)¶

Deprecations and Removals¶

#2639: pytest_namespace has been deprecated.
#3661: Calling a fixture function directly, as opposed to request them in a test function, now issues a RemovedInPytest4Warning. See the documentation for rationale and examples.

Features¶

#2283: New package fixture scope: fixtures are finalized when the last test of a package finishes. This feature is considered experimental, so use it sparingly.
#3576: Node.add_marker now supports an append=True/False parameter to determine whether the mark comes last (default) or first.
#3579: Fixture caplog now has a messages property, providing convenient access to the format-interpolated log messages without the extra data provided by the formatter/handler.
#3610: New --trace option to enter the debugger at the start of a test.
#3623: Introduce pytester.copy_example as helper to do acceptance tests against examples from the project.

Bug Fixes¶

#2220: Fix a bug where fixtures overridden by direct parameters (for example parametrization) were being instantiated even if they were not being used by a test.
#3695: Fix ApproxNumpy initialisation argument mixup, abs and rel tolerances were flipped causing strange comparison results. Add tests to check abs and rel tolerances for np.array and test for expecting nan with np.array()
#980: Fix truncated locals output in verbose mode.

Improved Documentation¶

#3295: Correct the usage documentation of --last-failed-no-failures by adding the missing --last-failed argument in the presented examples, because they are misleading and lead to think that the missing argument is not needed.

Trivial/Internal Changes¶

#3519: Now a README.md file is created in .pytest_cache to make it clear why the directory exists.

pytest 3.6.4 (2018-07-28)¶

Bug Fixes¶

Invoke pytest using -mpytest so sys.path does not get polluted by packages installed in site-packages. (#742)

Improved Documentation¶

Use smtp_connection instead of smtp in fixtures documentation to avoid possible confusion. (#3592)

Trivial/Internal Changes¶

Remove obsolete __future__ imports. (#2319)
Add CITATION to provide information on how to formally cite pytest. (#3402)
Replace broken type annotations with type comments. (#3635)
Pin pluggy to <0.8. (#3727)

pytest 3.6.3 (2018-07-04)¶

Bug Fixes¶

Fix ImportWarning triggered by explicit relative imports in assertion-rewritten package modules. (#3061)
Fix error in pytest.approx when dealing with 0-dimension numpy arrays. (#3593)
No longer raise ValueError when using the get_marker API. (#3605)
Fix problem where log messages with non-ascii characters would not appear in the output log file. (#3630)
No longer raise AttributeError when legacy marks can’t be stored in functions. (#3631)

Improved Documentation¶

The description above the example for @pytest.mark.skipif now better matches the code. (#3611)

Trivial/Internal Changes¶

Internal refactoring: removed unused CallSpec2tox ._globalid_args attribute and metafunc parameter from CallSpec2.copy(). (#3598)
Silence usage of reduce warning in Python 2 (#3609)
Fix usage of attr.ib deprecated convert parameter. (#3653)

pytest 3.6.2 (2018-06-20)¶

Bug Fixes¶

Fix regression in Node.add_marker by extracting the mark object of a MarkDecorator. (#3555)
Warnings without location were reported as None. This is corrected to now report <undetermined location>. (#3563)
Continue to call finalizers in the stack when a finalizer in a former scope raises an exception. (#3569)
Fix encoding error with print statements in doctests (#3583)

Improved Documentation¶

Add documentation for the --strict flag. (#3549)

Trivial/Internal Changes¶

Update old quotation style to parens in fixture.rst documentation. (#3525)
Improve display of hint about --fulltrace with KeyboardInterrupt. (#3545)
pytest’s testsuite is no longer runnable through python setup.py test – instead invoke pytest or tox directly. (#3552)
Fix typo in documentation (#3567)

pytest 3.6.1 (2018-06-05)¶

Bug Fixes¶

Fixed a bug where stdout and stderr were logged twice by junitxml when a test was marked xfail. (#3491)
Fix usefixtures mark applied to unittest tests by correctly instantiating FixtureInfo. (#3498)
Fix assertion rewriter compatibility with libraries that monkey patch file objects. (#3503)

Improved Documentation¶

Added a section on how to use fixtures as factories to the fixture documentation. (#3461)

Trivial/Internal Changes¶

Enable caching for pip/pre-commit in order to reduce build time on travis/appveyor. (#3502)
Switch pytest to the src/ layout as we already suggested it for good practice - now we implement it as well. (#3513)
Fix if in tests to support 3.7.0b5, where a docstring handling in AST got reverted. (#3530)
Remove some python2.5 compatibility code. (#3529)

pytest 3.6.0 (2018-05-23)¶

Features¶

Revamp the internals of the pytest.mark implementation with correct per node handling which fixes a number of long standing bugs caused by the old design. This introduces new Node.iter_markers(name) and Node.get_closest_marker(name) APIs. Users are strongly encouraged to read the reasons for the revamp in the docs, or jump over to details about updating existing code to use the new APIs. (#3317)
Now when @pytest.fixture is applied more than once to the same function a ValueError is raised. This buggy behavior would cause surprising problems and if was working for a test suite it was mostly by accident. (#2334)
Support for Python 3.7’s builtin breakpoint() method, see Using the builtin breakpoint function for details. (#3180)
monkeypatch now supports a context() function which acts as a context manager which undoes all patching done within the with block. (#3290)
The --pdb option now causes KeyboardInterrupt to enter the debugger, instead of stopping the test session. On python 2.7, hitting CTRL+C again exits the debugger. On python 3.2 and higher, use CTRL+D. (#3299)
pytest no longer changes the log level of the root logger when the log-level parameter has greater numeric value than that of the level of the root logger, which makes it play better with custom logging configuration in user code. (#3307)

Bug Fixes¶

A rare race-condition which might result in corrupted .pyc files on Windows has been hopefully solved. (#3008)
Also use iter_marker for discovering the marks applying for marker expressions from the cli to avoid the bad data from the legacy mark storage. (#3441)
When showing diffs of failed assertions where the contents contain only whitespace, escape them using repr() first to make it easy to spot the differences. (#3443)

Improved Documentation¶

Change documentation copyright year to a range which auto-updates itself each time it is published. (#3303)

Trivial/Internal Changes¶

pytest now depends on the python-atomicwrites library. (#3008)
Update all pypi.python.org URLs to pypi.org. (#3431)
Detect pytest_ prefixed hooks using the internal plugin manager since pluggy is deprecating the implprefix argument to PluginManager. (#3487)
Import Mapping and Sequence from _pytest.compat instead of directly from collections in python_api.py::approx. Add Mapping to _pytest.compat, import it from collections on python 2, but from collections.abc on Python 3 to avoid a DeprecationWarning on Python 3.7 or newer. (#3497)

pytest 3.5.1 (2018-04-23)¶

Bug Fixes¶

Reset sys.last_type, sys.last_value and sys.last_traceback before each test executes. Those attributes are added by pytest during the test run to aid debugging, but were never reset so they would create a leaking reference to the last failing test’s frame which in turn could never be reclaimed by the garbage collector. (#2798)
pytest.raises now raises TypeError when receiving an unknown keyword argument. (#3348)
pytest.raises now works with exception classes that look like iterables. (#3372)

Improved Documentation¶

Fix typo in caplog fixture documentation, which incorrectly identified certain attributes as methods. (#3406)

Trivial/Internal Changes¶

Added a more indicative error message when parametrizing a function whose argument takes a default value. (#3221)
Remove internal _pytest.terminal.flatten function in favor of more_itertools.collapse. (#3330)
Import some modules from collections.abc instead of collections as the former modules trigger DeprecationWarning in Python 3.7. (#3339)
record_property is no longer experimental, removing the warnings was forgotten. (#3360)
Mention in documentation and CLI help that fixtures with leading _ are printed by pytest --fixtures only if the -v option is added. (#3398)

pytest 3.5.0 (2018-03-21)¶

Deprecations and Removals¶

record_xml_property fixture is now deprecated in favor of the more generic record_property. (#2770)
Defining pytest_plugins is now deprecated in non-top-level conftest.py files, because they “leak” to the entire directory tree. See the docs for the rationale behind this decision (#3084)

Features¶

New --show-capture command-line option that allows to specify how to display captured output when tests fail: no, stdout, stderr, log or all (the default). (#1478)
New --rootdir command-line option to override the rules for discovering the root directory. See customize in the documentation for details. (#1642)
Fixtures are now instantiated based on their scopes, with higher-scoped fixtures (such as session) being instantiated first than lower-scoped fixtures (such as function). The relative order of fixtures of the same scope is kept unchanged, based in their declaration order and their dependencies. (#2405)
record_xml_property renamed to record_property and is now compatible with xdist, markers and any reporter. record_xml_property name is now deprecated. (#2770)
New --nf, --new-first options: run new tests first followed by the rest of the tests, in both cases tests are also sorted by the file modified time, with more recent files coming first. (#3034)
New --last-failed-no-failures command-line option that allows to specify the behavior of the cache plugin’s `--last-failed feature when no tests failed in the last run (or no cache was found): none or all (the default). (#3139)
New --doctest-continue-on-failure command-line option to enable doctests to show multiple failures for each snippet, instead of stopping at the first failure. (#3149)
Captured log messages are added to the <system-out> tag in the generated junit xml file if the junit_logging ini option is set to system-out. If the value of this ini option is system-err, the logs are written to <system-err>. The default value for junit_logging is no, meaning captured logs are not written to the output file. (#3156)
Allow the logging plugin to handle pytest_runtest_logstart and pytest_runtest_logfinish hooks when live logs are enabled. (#3189)
Passing --log-cli-level in the command-line now automatically activates live logging. (#3190)
Add command line option --deselect to allow deselection of individual tests at collection time. (#3198)
Captured logs are printed before entering pdb. (#3204)
Deselected item count is now shown before tests are run, e.g. collected X items / Y deselected. (#3213)
The builtin module platform is now available for use in expressions in pytest.mark. (#3236)
The short test summary info section now is displayed after tracebacks and warnings in the terminal. (#3255)
New --verbosity flag to set verbosity level explicitly. (#3296)
pytest.approx now accepts comparing a numpy array with a scalar. (#3312)

Bug Fixes¶

Suppress IOError when closing the temporary file used for capturing streams in Python 2.7. (#2370)
Fixed clear() method on caplog fixture which cleared records, but not the text property. (#3297)
During test collection, when stdin is not allowed to be read, the DontReadFromStdin object still allow itself to be iterable and resolved to an iterator without crashing. (#3314)

Improved Documentation¶

Added a reference page to the docs. (#1713)

Trivial/Internal Changes¶

Change minimum requirement of attrs to 17.4.0. (#3228)
Renamed example directories so all tests pass when ran from the base directory. (#3245)
Internal mark.py module has been turned into a package. (#3250)
pytest now depends on the more-itertools package. (#3265)
Added warning when [pytest] section is used in a .cfg file passed with -c (#3268)
nodeids can now be passed explicitly to FSCollector and Node constructors. (#3291)
Internal refactoring of FormattedExcinfo to use attrs facilities and remove old support code for legacy Python versions. (#3292)
Refactoring to unify how verbosity is handled internally. (#3296)
Internal refactoring to better integrate with argparse. (#3304)
Fix a python example when calling a fixture in doc/en/usage.rst (#3308)

pytest 3.4.2 (2018-03-04)¶

Bug Fixes¶

Removed progress information when capture option is no. (#3203)
Refactor check of bindir from exists to isdir. (#3241)
Fix TypeError issue when using approx with a Decimal value. (#3247)
Fix reference cycle generated when using the request fixture. (#3249)
[tool:pytest] sections in *.cfg files passed by the -c option are now properly recognized. (#3260)

Improved Documentation¶

Add logging plugin to plugins list. (#3209)

Trivial/Internal Changes¶

Fix minor typo in fixture.rst (#3259)

pytest 3.4.1 (2018-02-20)¶

Bug Fixes¶

Move import of doctest.UnexpectedException to top-level to avoid possible errors when using --pdb. (#1810)
Added printing of captured stdout/stderr before entering pdb, and improved a test which was giving false negatives about output capturing. (#3052)
Fix ordering of tests using parametrized fixtures which can lead to fixtures being created more than necessary. (#3161)
Fix bug where logging happening at hooks outside of “test run” hooks would cause an internal error. (#3184)
Detect arguments injected by unittest.mock.patch decorator correctly when pypi mock.patch is installed and imported. (#3206)
Errors shown when a pytest.raises() with match= fails are now cleaner on what happened: When no exception was raised, the “matching ‘…’” part got removed as it falsely implies that an exception was raised but it didn’t match. When a wrong exception was raised, it’s now thrown (like pytest.raised() without match= would) instead of complaining about the unmatched text. (#3222)
Fixed output capture handling in doctests on macOS. (#985)

Improved Documentation¶

Add Sphinx parameter docs for match and message args to pytest.raises. (#3202)

Trivial/Internal Changes¶

pytest has changed the publication procedure and is now being published to PyPI directly from Travis. (#3060)
Rename ParameterSet._for_parameterize() to _for_parametrize() in order to comply with the naming convention. (#3166)
Skip failing pdb/doctest test on mac. (#985)

pytest 3.4.0 (2018-01-30)¶

Deprecations and Removals¶

All pytest classes now subclass object for better Python 2/3 compatibility. This should not affect user code except in very rare edge cases. (#2147)

Features¶

Introduce empty_parameter_set_mark ini option to select which mark to apply when @pytest.mark.parametrize is given an empty set of parameters. Valid options are skip (default) and xfail. Note that it is planned to change the default to xfail in future releases as this is considered less error prone. (#2527)
Incompatible change: after community feedback the logging functionality has undergone some changes. Please consult the logging documentation for details. (#3013)
Console output falls back to “classic” mode when capturing is disabled (-s), otherwise the output gets garbled to the point of being useless. (#3038)
New pytest_runtest_logfinish hook which is called when a test item has finished executing, analogous to pytest_runtest_logstart. (#3101)
Improve performance when collecting tests using many fixtures. (#3107)
New caplog.get_records(when) method which provides access to the captured records for the "setup", "call" and "teardown" testing stages. (#3117)
New fixture record_xml_attribute that allows modifying and inserting attributes on the <testcase> xml node in JUnit reports. (#3130)
The default cache directory has been renamed from .cache to .pytest_cache after community feedback that the name .cache did not make it clear that it was used by pytest. (#3138)
Colorize the levelname column in the live-log output. (#3142)

Bug Fixes¶

Fix hanging pexpect test on macOS by using flush() instead of wait(). (#2022)
Fix restoring Python state after in-process pytest runs with the pytester plugin; this may break tests using multiple inprocess pytest runs if later ones depend on earlier ones leaking global interpreter changes. (#3016)
Fix skipping plugin reporting hook when test aborted before plugin setup hook. (#3074)
Fix progress percentage reported when tests fail during teardown. (#3088)
Incompatible change: -o/--override option no longer eats all the remaining options, which can lead to surprising behavior: for example, pytest -o foo=1 /path/to/test.py would fail because /path/to/test.py would be considered as part of the -o command-line argument. One consequence of this is that now multiple configuration overrides need multiple -o flags: pytest -o foo=1 -o bar=2. (#3103)

Improved Documentation¶

Document hooks (defined with historic=True) which cannot be used with hookwrapper=True. (#2423)
Clarify that warning capturing doesn’t change the warning filter by default. (#2457)
Clarify a possible confusion when using pytest_fixture_setup with fixture functions that return None. (#2698)
Fix the wording of a sentence on doctest flags used in pytest. (#3076)
Prefer https://*.readthedocs.io over http://*.rtfd.org for links in the documentation. (#3092)
Improve readability (wording, grammar) of Getting Started guide (#3131)
Added note that calling pytest.main multiple times from the same process is not recommended because of import caching. (#3143)

Trivial/Internal Changes¶

Show a simple and easy error when keyword expressions trigger a syntax error (for example, "-k foo and import" will show an error that you cannot use the import keyword in expressions). (#2953)
Change parametrized automatic test id generation to use the __name__ attribute of functions instead of the fallback argument name plus counter. (#2976)
Replace py.std with stdlib imports. (#3067)
Corrected ‘you’ to ‘your’ in logging docs. (#3129)

pytest 3.3.2 (2017-12-25)¶

Bug Fixes¶

pytester: ignore files used to obtain current user metadata in the fd leak detector. (#2784)
Fix memory leak where objects returned by fixtures were never destructed by the garbage collector. (#2981)
Fix conversion of pyargs to filename to not convert symlinks on Python 2. (#2985)
PYTEST_DONT_REWRITE is now checked for plugins too rather than only for test modules. (#2995)

Improved Documentation¶

Add clarifying note about behavior of multiple parametrized arguments (#3001)

Trivial/Internal Changes¶

Code cleanup. (#3015, #3021)
Clean up code by replacing imports and references of _ast to ast. (#3018)

pytest 3.3.1 (2017-12-05)¶

Bug Fixes¶

Fix issue about -p no:<plugin> having no effect. (#2920)
Fix regression with warnings that contained non-strings in their arguments in Python 2. (#2956)
Always escape null bytes when setting PYTEST_CURRENT_TEST. (#2957)
Fix ZeroDivisionError when using the testmon plugin when no tests were actually collected. (#2971)
Bring back TerminalReporter.writer as an alias to TerminalReporter._tw. This alias was removed by accident in the 3.3.0 release. (#2984)
The pytest-capturelog plugin is now also blacklisted, avoiding errors when running pytest with it still installed. (#3004)

Improved Documentation¶

Fix broken link to plugin pytest-localserver. (#2963)

Trivial/Internal Changes¶

Update github “bugs” link in CONTRIBUTING.rst (#2949)

pytest 3.3.0 (2017-11-23)¶

Deprecations and Removals¶

pytest no longer supports Python 2.6 and 3.3. Those Python versions are EOL for some time now and incur maintenance and compatibility costs on the pytest core team, and following up with the rest of the community we decided that they will no longer be supported starting on this version. Users which still require those versions should pin pytest to <3.3. (#2812)
Remove internal _preloadplugins() function. This removal is part of the pytest_namespace() hook deprecation. (#2636)
Internally change CallSpec2 to have a list of marks instead of a broken mapping of keywords. This removes the keywords attribute of the internal CallSpec2 class. (#2672)
Remove ParameterSet.deprecated_arg_dict - its not a public api and the lack of the underscore was a naming error. (#2675)
Remove the internal multi-typed attribute Node._evalskip and replace it with the boolean Node._skipped_by_mark. (#2767)
The params list passed to pytest.fixture is now for all effects considered immutable and frozen at the moment of the pytest.fixture call. Previously the list could be changed before the first invocation of the fixture allowing for a form of dynamic parametrization (for example, updated from command-line options), but this was an unwanted implementation detail which complicated the internals and prevented some internal cleanup. See issue #2959 for details and a recommended workaround.

Features¶

pytest_fixture_post_finalizer hook can now receive a request argument. (#2124)
Replace the old introspection code in compat.py that determines the available arguments of fixtures with inspect.signature on Python 3 and funcsigs.signature on Python 2. This should respect __signature__ declarations on functions. (#2267)
Report tests with global pytestmark variable only once. (#2549)
Now pytest displays the total progress percentage while running tests. The previous output style can be set by configuring the console_output_style setting to classic. (#2657)
Match warns signature to raises by adding match keyword. (#2708)
pytest now captures and displays output from the standard logging module. The user can control the logging level to be captured by specifying options in pytest.ini, the command line and also during individual tests using markers. Also, a caplog fixture is available that enables users to test the captured log during specific tests (similar to capsys for example). For more information, please see the logging docs. This feature was introduced by merging the popular pytest-catchlog plugin, thanks to @thisch. Be advised that during the merging the backward compatibility interface with the defunct pytest-capturelog has been dropped. (#2794)
Add allow_module_level kwarg to pytest.skip(), enabling to skip the whole module. (#2808)
Allow setting file_or_dir, -c, and -o in PYTEST_ADDOPTS. (#2824)
Return stdout/stderr capture results as a namedtuple, so out and err can be accessed by attribute. (#2879)
Add capfdbinary, a version of capfd which returns bytes from readouterr(). (#2923)
Add capsysbinary a version of capsys which returns bytes from readouterr(). (#2934)
Implement feature to skip setup.py files when run with --doctest-modules. (#502)

Bug Fixes¶

Resume output capturing after capsys/capfd.disabled() context manager. (#1993)
pytest_fixture_setup and pytest_fixture_post_finalizer hooks are now called for all conftest.py files. (#2124)
If an exception happens while loading a plugin, pytest no longer hides the original traceback. In Python 2 it will show the original traceback with a new message that explains in which plugin. In Python 3 it will show 2 canonized exceptions, the original exception while loading the plugin in addition to an exception that pytest throws about loading a plugin. (#2491)
capsys and capfd can now be used by other fixtures. (#2709)
Internal pytester plugin properly encodes bytes arguments to utf-8. (#2738)
testdir now uses use the same method used by tmpdir to create its temporary directory. This changes the final structure of the testdir directory slightly, but should not affect usage in normal scenarios and avoids a number of potential problems. (#2751)
pytest no longer complains about warnings with unicode messages being non-ascii compatible even for ascii-compatible messages. As a result of this, warnings with unicode messages are converted first to an ascii representation for safety. (#2809)
Change return value of pytest command when --maxfail is reached from 2 (interrupted) to 1 (failed). (#2845)
Fix issue in assertion rewriting which could lead it to rewrite modules which should not be rewritten. (#2939)
Handle marks without description in pytest.ini. (#2942)

Trivial/Internal Changes¶

pytest now depends on attrs for internal structures to ease code maintainability. (#2641)
Refactored internal Python 2/3 compatibility code to use six. (#2642)
Stop vendoring pluggy - we’re missing out on its latest changes for not much benefit (#2719)
Internal refactor: simplify ascii string escaping by using the backslashreplace error handler in newer Python 3 versions. (#2734)
Remove unnecessary mark evaluator in unittest plugin (#2767)
Calls to Metafunc.addcall now emit a deprecation warning. This function is scheduled to be removed in pytest-4.0. (#2876)
Internal move of the parameterset extraction to a more maintainable place. (#2877)
Internal refactoring to simplify scope node lookup. (#2910)
Configure pytest to prevent pip from installing pytest in unsupported Python versions. (#2922)

pytest 3.2.5 (2017-11-15)¶

Bug Fixes¶

Remove py<1.5 restriction from pytest as this can cause version conflicts in some installations. (#2926)

pytest 3.2.4 (2017-11-13)¶

Bug Fixes¶

Fix the bug where running with --pyargs will result in items with empty parent.nodeid if run from a different root directory. (#2775)
Fix issue with @pytest.parametrize if argnames was specified as keyword arguments. (#2819)
Strip whitespace from marker names when reading them from INI config. (#2856)
Show full context of doctest source in the pytest output, if the line number of failed example in the docstring is < 9. (#2882)
Match fixture paths against actual path segments in order to avoid matching folders which share a prefix. (#2836)

Improved Documentation¶

Introduce a dedicated section about conftest.py. (#1505)
Explicitly mention xpass in the documentation of xfail. (#1997)
Append example for pytest.param in the example/parametrize document. (#2658)
Clarify language of proposal for fixtures parameters (#2893)
List python 3.6 in the documented supported versions in the getting started document. (#2903)
Clarify the documentation of available fixture scopes. (#538)
Add documentation about the python -m pytest invocation adding the current directory to sys.path. (#911)

pytest 3.2.3 (2017-10-03)¶

Bug Fixes¶

Fix crash in tab completion when no prefix is given. (#2748)
The equality checking function (__eq__) of MarkDecorator returns False if one object is not an instance of MarkDecorator. (#2758)
When running pytest --fixtures-per-test: don’t crash if an item has no _fixtureinfo attribute (e.g. doctests) (#2788)

Improved Documentation¶

In help text of -k option, add example of using not to not select certain tests whose names match the provided expression. (#1442)
Add note in parametrize.rst about calling metafunc.parametrize multiple times. (#1548)

Trivial/Internal Changes¶

Set xfail_strict=True in pytest’s own test suite to catch expected failures as soon as they start to pass. (#2722)
Fix typo in example of passing a callable to markers (in example/markers.rst) (#2765)

pytest 3.2.2 (2017-09-06)¶

Bug Fixes¶

Calling the deprecated request.getfuncargvalue() now shows the source of the call. (#2681)
Allow tests declared as @staticmethod to use fixtures. (#2699)
Fixed edge-case during collection: attributes which raised pytest.fail when accessed would abort the entire collection. (#2707)
Fix ReprFuncArgs with mixed unicode and UTF-8 args. (#2731)

Improved Documentation¶

In examples on working with custom markers, add examples demonstrating the usage of pytest.mark.MARKER_NAME.with_args in comparison with pytest.mark.MARKER_NAME.__call__ (#2604)
In one of the simple examples, use pytest_collection_modifyitems() to skip tests based on a command-line option, allowing its sharing while preventing a user error when accessing pytest.config before the argument parsing. (#2653)

Trivial/Internal Changes¶

Fixed minor error in ‘Good Practices/Manual Integration’ code snippet. (#2691)
Fixed typo in goodpractices.rst. (#2721)
Improve user guidance regarding --resultlog deprecation. (#2739)

pytest 3.2.1 (2017-08-08)¶

Bug Fixes¶

Fixed small terminal glitch when collecting a single test item. (#2579)
Correctly consider / as the file separator to automatically mark plugin files for rewrite on Windows. (#2591)
Properly escape test names when setting PYTEST_CURRENT_TEST environment variable. (#2644)
Fix error on Windows and Python 3.6+ when sys.stdout has been replaced with a stream-like object which does not implement the full io module buffer protocol. In particular this affects pytest-xdist users on the aforementioned platform. (#2666)

Improved Documentation¶

Explicitly document which pytest features work with unittest. (#2626)

pytest 3.2.0 (2017-07-30)¶

Deprecations and Removals¶

pytest.approx no longer supports >, >=, < and <= operators to avoid surprising/inconsistent behavior. See the approx() docs for more information. (#2003)
All old-style specific behavior in current classes in the pytest’s API is considered deprecated at this point and will be removed in a future release. This affects Python 2 users only and in rare situations. (#2147)
A deprecation warning is now raised when using marks for parameters in pytest.mark.parametrize. Use pytest.param to apply marks to parameters instead. (#2427)

Features¶

Add support for numpy arrays (and dicts) to approx. (#1994)
Now test function objects have a pytestmark attribute containing a list of marks applied directly to the test function, as opposed to marks inherited from parent classes or modules. (#2516)
Collection ignores local virtualenvs by default; --collect-in-virtualenv overrides this behavior. (#2518)
Allow class methods decorated as @staticmethod to be candidates for collection as a test function. (Only for Python 2.7 and above. Python 2.6 will still ignore static methods.) (#2528)
Introduce mark.with_args in order to allow passing functions/classes as sole argument to marks. (#2540)
New cache_dir ini option: sets the directory where the contents of the cache plugin are stored. Directory may be relative or absolute path: if relative path, then directory is created relative to rootdir, otherwise it is used as is. Additionally path may contain environment variables which are expanded during runtime. (#2543)
Introduce the PYTEST_CURRENT_TEST environment variable that is set with the nodeid and stage (setup, call and teardown) of the test being currently executed. See the documentation for more info. (#2583)
Introduced @pytest.mark.filterwarnings mark which allows overwriting the warnings filter on a per test, class or module level. See the docs for more information. (#2598)
--last-failed now remembers forever when a test has failed and only forgets it if it passes again. This makes it easy to fix a test suite by selectively running files and fixing tests incrementally. (#2621)
New pytest_report_collectionfinish hook which allows plugins to add messages to the terminal reporting after collection has been finished successfully. (#2622)
Added support for PEP 415's Exception.__suppress_context__. Now if a raise exception from None is caught by pytest, pytest will no longer chain the context in the test report. The behavior now matches Python’s traceback behavior. (#2631)
Exceptions raised by pytest.fail, pytest.skip and pytest.xfail now subclass BaseException, making them harder to be caught unintentionally by normal code. (#580)

Bug Fixes¶

Set stdin to a closed PIPE in pytester.py.Testdir.popen() for avoid unwanted interactive pdb (#2023)
Add missing encoding attribute to sys.std* streams when using capsys capture mode. (#2375)
Fix terminal color changing to black on Windows if colorama is imported in a conftest.py file. (#2510)
Fix line number when reporting summary of skipped tests. (#2548)
capture: ensure that EncodedFile.name is a string. (#2555)
The options --fixtures and --fixtures-per-test will now keep indentation within docstrings. (#2574)
doctests line numbers are now reported correctly, fixing pytest-sugar#122. (#2610)
Fix non-determinism in order of fixture collection. Adds new dependency (ordereddict) for Python 2.6. (#920)

Improved Documentation¶

Clarify pytest_configure hook call order. (#2539)
Extend documentation for testing plugin code with the pytester plugin. (#971)

Trivial/Internal Changes¶

Update help message for --strict to make it clear it only deals with unregistered markers, not warnings. (#2444)
Internal code move: move code for pytest.approx/pytest.raises to own files in order to cut down the size of python.py (#2489)
Renamed the utility function _pytest.compat._escape_strings to _ascii_escaped to better communicate the function’s purpose. (#2533)
Improve error message for CollectError with skip/skipif. (#2546)
Emit warning about yield tests being deprecated only once per generator. (#2562)
Ensure final collected line doesn’t include artifacts of previous write. (#2571)
Fixed all flake8 errors and warnings. (#2581)
Added fix-lint tox environment to run automatic pep8 fixes on the code. (#2582)
Turn warnings into errors in pytest’s own test suite in order to catch regressions due to deprecations more promptly. (#2588)
Show multiple issue links in CHANGELOG entries. (#2620)

pytest 3.1.3 (2017-07-03)¶

Bug Fixes¶

Fix decode error in Python 2 for doctests in docstrings. (#2434)
Exceptions raised during teardown by finalizers are now suppressed until all finalizers are called, with the initial exception reraised. (#2440)
Fix incorrect “collected items” report when specifying tests on the command- line. (#2464)
deprecated_call in context-manager form now captures deprecation warnings even if the same warning has already been raised. Also, deprecated_call will always produce the same error message (previously it would produce different messages in context-manager vs. function-call mode). (#2469)
Fix issue where paths collected by pytest could have triple leading / characters. (#2475)
Fix internal error when trying to detect the start of a recursive traceback. (#2486)

Improved Documentation¶

Explicitly state for which hooks the calls stop after the first non-None result. (#2493)

Trivial/Internal Changes¶

Create invoke tasks for updating the vendored packages. (#2474)
Update copyright dates in LICENSE, README.rst and in the documentation. (#2499)

pytest 3.1.2 (2017-06-08)¶

Bug Fixes¶

Required options added via pytest_addoption will no longer prevent using –help without passing them. (#1999)
Respect python_files in assertion rewriting. (#2121)
Fix recursion error detection when frames in the traceback contain objects that can’t be compared (like numpy arrays). (#2459)
UnicodeWarning is issued from the internal pytest warnings plugin only when the message contains non-ascii unicode (Python 2 only). (#2463)
Added a workaround for Python 3.6 WindowsConsoleIO breaking due to Pytests’s FDCapture. Other code using console handles might still be affected by the very same issue and might require further workarounds/fixes, i.e. colorama. (#2467)

Improved Documentation¶

Fix internal API links to pluggy objects. (#2331)
Make it clear that pytest.xfail stops test execution at the calling point and improve overall flow of the skipping docs. (#810)

pytest 3.1.1 (2017-05-30)¶

Bug Fixes¶

pytest warning capture no longer overrides existing warning filters. The previous behaviour would override all filters and caused regressions in test suites which configure warning filters to match their needs. Note that as a side-effect of this is that DeprecationWarning and PendingDeprecationWarning are no longer shown by default. (#2430)
Fix issue with non-ascii contents in doctest text files. (#2434)
Fix encoding errors for unicode warnings in Python 2. (#2436)
pytest.deprecated_call now captures PendingDeprecationWarning in context manager form. (#2441)

Improved Documentation¶

Addition of towncrier for changelog management. (#2390)

3.1.0 (2017-05-22)¶

New Features¶

The pytest-warnings plugin has been integrated into the core and now pytest automatically captures and displays warnings at the end of the test session.
Warning

This feature may disrupt test suites which apply and treat warnings themselves, and can be disabled in your pytest.ini:
```
[pytest]
addopts = -p no:warnings
```
See the warnings documentation page for more information.
Thanks @nicoddemus for the PR.
Added junit_suite_name ini option to specify root <testsuite> name for JUnit XML reports (#533).
Added an ini option doctest_encoding to specify which encoding to use for doctest files. Thanks @wheerd for the PR (#2101).
pytest.warns now checks for subclass relationship rather than class equality. Thanks @lesteve for the PR (#2166)
pytest.raises now asserts that the error message matches a text or regex with the match keyword argument. Thanks @Kriechi for the PR.
pytest.param can be used to declare test parameter sets with marks and test ids. Thanks @RonnyPfannschmidt for the PR.

Changes¶

remove all internal uses of pytest_namespace hooks, this is to prepare the removal of preloadconfig in pytest 4.0 Thanks to @RonnyPfannschmidt for the PR.
pytest now warns when a callable ids raises in a parametrized test. Thanks @fogo for the PR.
It is now possible to skip test classes from being collected by setting a __test__ attribute to False in the class body (#2007). Thanks to @syre for the report and @lwm for the PR.
Change junitxml.py to produce reports that comply with Junitxml schema. If the same test fails with failure in call and then errors in teardown we split testcase element into two, one containing the error and the other the failure. (#2228) Thanks to @kkoukiou for the PR.
Testcase reports with a url attribute will now properly write this to junitxml. Thanks @fushi for the PR (#1874).
Remove common items from dict comparison output when verbosity=1. Also update the truncation message to make it clearer that pytest truncates all assertion messages if verbosity < 2 (#1512). Thanks @mattduck for the PR
--pdbcls no longer implies --pdb. This makes it possible to use addopts=--pdbcls=module.SomeClass on pytest.ini. Thanks @davidszotten for the PR (#1952).
fix #2013: turn RecordedWarning into namedtuple, to give it a comprehensible repr while preventing unwarranted modification.
fix #2208: ensure an iteration limit for _pytest.compat.get_real_func. Thanks @RonnyPfannschmidt for the report and PR.
Hooks are now verified after collection is complete, rather than right after loading installed plugins. This makes it easy to write hooks for plugins which will be loaded during collection, for example using the pytest_plugins special variable (#1821). Thanks @nicoddemus for the PR.
Modify pytest_make_parametrize_id() hook to accept argname as an additional parameter. Thanks @unsignedint for the PR.
Add venv to the default norecursedirs setting. Thanks @The-Compiler for the PR.
PluginManager.import_plugin now accepts unicode plugin names in Python 2. Thanks @reutsharabani for the PR.
fix #2308: When using both --lf and --ff, only the last failed tests are run. Thanks @ojii for the PR.
Replace minor/patch level version numbers in the documentation with placeholders. This significantly reduces change-noise as different contributors regenerate the documentation on different platforms. Thanks @RonnyPfannschmidt for the PR.
fix #2391: consider pytest_plugins on all plugin modules Thanks @RonnyPfannschmidt for the PR.

Bug Fixes¶

Fix AttributeError on sys.stdout.buffer / sys.stderr.buffer while using capsys fixture in python 3. (#1407). Thanks to @asottile.
Change capture.py’s DontReadFromInput class to throw io.UnsupportedOperation errors rather than ValueErrors in the fileno method (#2276). Thanks @metasyn and @vlad-dragos for the PR.
Fix exception formatting while importing modules when the exception message contains non-ascii characters (#2336). Thanks @fabioz for the report and @nicoddemus for the PR.
Added documentation related to issue (#1937) Thanks @skylarjhdownes for the PR.
Allow collecting files with any file extension as Python modules (#2369). Thanks @Kodiologist for the PR.
Show the correct error message when collect “parametrize” func with wrong args (#2383). Thanks @The-Compiler for the report and @robin0371 for the PR.

3.0.7 (2017-03-14)¶

Fix issue in assertion rewriting breaking due to modules silently discarding other modules when importing fails Notably, importing the anydbm module is fixed. (#2248). Thanks @pfhayes for the PR.
junitxml: Fix problematic case where system-out tag occurred twice per testcase element in the XML report. Thanks @kkoukiou for the PR.
Fix regression, pytest now skips unittest correctly if run with --pdb (#2137). Thanks to @gst for the report and @mbyt for the PR.
Ignore exceptions raised from descriptors (e.g. properties) during Python test collection (#2234). Thanks to @bluetech.
--override-ini now correctly overrides some fundamental options like python_files (#2238). Thanks @sirex for the report and @nicoddemus for the PR.
Replace raise StopIteration usages in the code by simple returns to finish generators, in accordance to PEP 479 (#2160). Thanks to @nicoddemus for the PR.
Fix internal errors when an unprintable AssertionError is raised inside a test. Thanks @omerhadari for the PR.
Skipping plugin now also works with test items generated by custom collectors (#2231). Thanks to @vidartf.
Fix trailing whitespace in console output if no .ini file presented (#2281). Thanks @fbjorn for the PR.
Conditionless xfail markers no longer rely on the underlying test item being an instance of PyobjMixin, and can therefore apply to tests not collected by the built-in python test collector. Thanks @barneygale for the PR.

3.0.6 (2017-01-22)¶

pytest no longer generates PendingDeprecationWarning from its own operations, which was introduced by mistake in version 3.0.5 (#2118). Thanks to @nicoddemus for the report and @RonnyPfannschmidt for the PR.
pytest no longer recognizes coroutine functions as yield tests (#2129). Thanks to @malinoff for the PR.
Plugins loaded by the PYTEST_PLUGINS environment variable are now automatically considered for assertion rewriting (#2185). Thanks @nicoddemus for the PR.
Improve error message when pytest.warns fails (#2150). The type(s) of the expected warnings and the list of caught warnings is added to the error message. Thanks @lesteve for the PR.
Fix pytester internal plugin to work correctly with latest versions of zope.interface (#1989). Thanks @nicoddemus for the PR.
Assert statements of the pytester plugin again benefit from assertion rewriting (#1920). Thanks @RonnyPfannschmidt for the report and @nicoddemus for the PR.
Specifying tests with colons like test_foo.py::test_bar for tests in subdirectories with ini configuration files now uses the correct ini file (#2148). Thanks @pelme.
Fail testdir.runpytest().assert_outcomes() explicitly if the pytest terminal output it relies on is missing. Thanks to @eli-b for the PR.

3.0.5 (2016-12-05)¶

Add warning when not passing option=value correctly to -o/--override-ini (#2105). Also improved the help documentation. Thanks to @mbukatov for the report and @lwm for the PR.
Now --confcutdir and --junit-xml are properly validated if they are directories and filenames, respectively (#2089 and #2078). Thanks to @lwm for the PR.
Add hint to error message hinting possible missing __init__.py (#478). Thanks @DuncanBetts.
More accurately describe when fixture finalization occurs in documentation (#687). Thanks @DuncanBetts.
Provide :ref: targets for recwarn.rst so we can use intersphinx referencing. Thanks to @dupuy for the report and @lwm for the PR.
In Python 2, use a simple +- ASCII string in the string representation of pytest.approx (for example "4 +- 4.0e-06") because it is brittle to handle that in different contexts and representations internally in pytest which can result in bugs such as #2111. In Python 3, the representation still uses ± (for example 4 ± 4.0e-06). Thanks @kerrick-lyft for the report and @nicoddemus for the PR.
Using item.Function, item.Module, etc., is now issuing deprecation warnings, prefer pytest.Function, pytest.Module, etc., instead (#2034). Thanks @nmundar for the PR.
Fix error message using approx with complex numbers (#2082). Thanks @adler-j for the report and @nicoddemus for the PR.
Fixed false-positives warnings from assertion rewrite hook for modules imported more than once by the pytest_plugins mechanism. Thanks @nicoddemus for the PR.
Remove an internal cache which could cause hooks from conftest.py files in sub-directories to be called in other directories incorrectly (#2016). Thanks @d-b-w for the report and @nicoddemus for the PR.
Remove internal code meant to support earlier Python 3 versions that produced the side effect of leaving None in sys.modules when expressions were evaluated by pytest (for example passing a condition as a string to pytest.mark.skipif)(#2103). Thanks @jaraco for the report and @nicoddemus for the PR.
Cope gracefully with a .pyc file with no matching .py file (#2038). Thanks @nedbat.

3.0.4 (2016-11-09)¶

Import errors when collecting test modules now display the full traceback (#1976). Thanks @cwitty for the report and @nicoddemus for the PR.
Fix confusing command-line help message for custom options with two or more metavar properties (#2004). Thanks @okulynyak and @davehunt for the report and @nicoddemus for the PR.
When loading plugins, import errors which contain non-ascii messages are now properly handled in Python 2 (#1998). Thanks @nicoddemus for the PR.
Fixed cyclic reference when pytest.raises is used in context-manager form (#1965). Also as a result of this fix, sys.exc_info() is left empty in both context-manager and function call usages. Previously, sys.exc_info would contain the exception caught by the context manager, even when the expected exception occurred. Thanks @MSeifert04 for the report and the PR.
Fixed false-positives warnings from assertion rewrite hook for modules that were rewritten but were later marked explicitly by pytest.register_assert_rewrite or implicitly as a plugin (#2005). Thanks @RonnyPfannschmidt for the report and @nicoddemus for the PR.
Report teardown output on test failure (#442). Thanks @matclab for the PR.
Fix teardown error message in generated xUnit XML. Thanks @gdyuldin for the PR.
Properly handle exceptions in multiprocessing tasks (#1984). Thanks @adborden for the report and @nicoddemus for the PR.
Clean up unittest TestCase objects after tests are complete (#1649). Thanks @d-b-w for the report and PR.

3.0.3 (2016-09-28)¶

The ids argument to parametrize again accepts unicode strings in Python 2 (#1905). Thanks @philpep for the report and @nicoddemus for the PR.
Assertions are now being rewritten for plugins in development mode (pip install -e) (#1934). Thanks @nicoddemus for the PR.
Fix pkg_resources import error in Jython projects (#1853). Thanks @raquelalegre for the PR.
Got rid of AttributeError: 'Module' object has no attribute '_obj' exception in Python 3 (#1944). Thanks @axil for the PR.
Explain a bad scope value passed to @fixture declarations or a MetaFunc.parametrize() call.
This version includes pluggy-0.4.0, which correctly handles VersionConflict errors in plugins (#704). Thanks @nicoddemus for the PR.

3.0.2 (2016-09-01)¶

Improve error message when passing non-string ids to pytest.mark.parametrize (#1857). Thanks @okken for the report and @nicoddemus for the PR.
Add buffer attribute to stdin stub class pytest.capture.DontReadFromInput Thanks @joguSD for the PR.
Fix UnicodeEncodeError when string comparison with unicode has failed. (#1864) Thanks @AiOO for the PR.
pytest_plugins is now handled correctly if defined as a string (as opposed as a sequence of strings) when modules are considered for assertion rewriting. Due to this bug, much more modules were being rewritten than necessary if a test suite uses pytest_plugins to load internal plugins (#1888). Thanks @jaraco for the report and @nicoddemus for the PR (#1891).
Do not call tearDown and cleanups when running tests from unittest.TestCase subclasses with --pdb enabled. This allows proper post mortem debugging for all applications which have significant logic in their tearDown machinery (#1890). Thanks @mbyt for the PR.
Fix use of deprecated getfuncargvalue method in the internal doctest plugin. Thanks @ViviCoder for the report (#1898).

3.0.1 (2016-08-23)¶

Fix regression when importorskip is used at module level (#1822). Thanks @jaraco and @The-Compiler for the report and @nicoddemus for the PR.
Fix parametrization scope when session fixtures are used in conjunction with normal parameters in the same call (#1832). Thanks @The-Compiler for the report, @Kingdread and @nicoddemus for the PR.
Fix internal error when parametrizing tests or fixtures using an empty ids argument (#1849). Thanks @OPpuolitaival for the report and @nicoddemus for the PR.
Fix loader error when running pytest embedded in a zipfile. Thanks @mbachry for the PR.

3.0.0 (2016-08-18)¶

Incompatible changes

A number of incompatible changes were made in this release, with the intent of removing features deprecated for a long time or change existing behaviors in order to make them less surprising/more useful.

Reinterpretation mode has now been removed. Only plain and rewrite mode are available, consequently the --assert=reinterp option is no longer available. This also means files imported from plugins or conftest.py will not benefit from improved assertions by default, you should use pytest.register_assert_rewrite() to explicitly turn on assertion rewriting for those files. Thanks @flub for the PR.
The following deprecated commandline options were removed:
- --genscript: no longer supported;
- --no-assert: use --assert=plain instead;
- --nomagic: use --assert=plain instead;
- --report: use -r instead;
Thanks to @RedBeardCode for the PR (#1664).
ImportErrors in plugins now are a fatal error instead of issuing a pytest warning (#1479). Thanks to @The-Compiler for the PR.
Removed support code for Python 3 versions < 3.3 (#1627).
Removed all py.test-X* entry points. The versioned, suffixed entry points were never documented and a leftover from a pre-virtualenv era. These entry points also created broken entry points in wheels, so removing them also removes a source of confusion for users (#1632). Thanks @obestwalter for the PR.
pytest.skip() now raises an error when used to decorate a test function, as opposed to its original intent (to imperatively skip a test inside a test function). Previously this usage would cause the entire module to be skipped (#607). Thanks @omarkohl for the complete PR (#1519).
Exit tests if a collection error occurs. A poll indicated most users will hit CTRL-C anyway as soon as they see collection errors, so pytest might as well make that the default behavior (#1421). A --continue-on-collection-errors option has been added to restore the previous behaviour. Thanks @olegpidsadnyi and @omarkohl for the complete PR (#1628).
Renamed the pytest pdb module (plugin) into debugging to avoid clashes with the builtin pdb module.
Raise a helpful failure message when requesting a parametrized fixture at runtime, e.g. with request.getfixturevalue. Previously these parameters were simply never defined, so a fixture decorated like @pytest.fixture(params=[0, 1, 2]) only ran once (#460). Thanks to @nikratio for the bug report, @RedBeardCode and @tomviner for the PR.
_pytest.monkeypatch.monkeypatch class has been renamed to _pytest.monkeypatch.MonkeyPatch so it doesn’t conflict with the monkeypatch fixture.
--exitfirst / -x can now be overridden by a following --maxfail=N and is just a synonym for --maxfail=1.

New Features

Support nose-style __test__ attribute on methods of classes, including unittest-style Classes. If set to False, the test will not be collected.
New doctest_namespace fixture for injecting names into the namespace in which doctests run. Thanks @milliams for the complete PR (#1428).
New --doctest-report option available to change the output format of diffs when running (failing) doctests (implements #1749). Thanks @hartym for the PR.
New name argument to pytest.fixture decorator which allows a custom name for a fixture (to solve the funcarg-shadowing-fixture problem). Thanks @novas0x2a for the complete PR (#1444).
New approx() function for easily comparing floating-point numbers in tests. Thanks @kalekundert for the complete PR (#1441).
Ability to add global properties in the final xunit output file by accessing the internal junitxml plugin (experimental). Thanks @tareqalayan for the complete PR #1454).
New ExceptionInfo.match() method to match a regular expression on the string representation of an exception (#372). Thanks @omarkohl for the complete PR (#1502).
__tracebackhide__ can now also be set to a callable which then can decide whether to filter the traceback based on the ExceptionInfo object passed to it. Thanks @The-Compiler for the complete PR (#1526).
New pytest_make_parametrize_id(config, val) hook which can be used by plugins to provide friendly strings for custom types. Thanks @palaviv for the PR.
capsys and capfd now have a disabled() context-manager method, which can be used to temporarily disable capture within a test. Thanks @nicoddemus for the PR.
New cli flag --fixtures-per-test: shows which fixtures are being used for each selected test item. Features doc strings of fixtures by default. Can also show where fixtures are defined if combined with -v. Thanks @hackebrot for the PR.
Introduce pytest command as recommended entry point. Note that py.test still works and is not scheduled for removal. Closes proposal #1629. Thanks @obestwalter and @davehunt for the complete PR (#1633).
New cli flags:
- --setup-plan: performs normal collection and reports the potential setup and teardown and does not execute any fixtures and tests;
- --setup-only: performs normal collection, executes setup and teardown of fixtures and reports them;
- --setup-show: performs normal test execution and additionally shows setup and teardown of fixtures;
- --keep-duplicates: py.test now ignores duplicated paths given in the command line. To retain the previous behavior where the same test could be run multiple times by specifying it in the command-line multiple times, pass the --keep-duplicates argument (#1609);
Thanks @d6e, @kvas-it, @sallner, @ioggstream and @omarkohl for the PRs.
New CLI flag --override-ini/-o: overrides values from the ini file. For example: "-o xfail_strict=True"’. Thanks @blueyed and @fengxx for the PR.
New hooks:
- pytest_fixture_setup(fixturedef, request): executes fixture setup;
- pytest_fixture_post_finalizer(fixturedef): called after the fixture’s finalizer and has access to the fixture’s result cache.
Thanks @d6e, @sallner.
Issue warnings for asserts whose test is a tuple literal. Such asserts will never fail because tuples are always truthy and are usually a mistake (see #1562). Thanks @kvas-it, for the PR.
Allow passing a custom debugger class (e.g. --pdbcls=IPython.core.debugger:Pdb). Thanks to @anntzer for the PR.

Changes

Plugins now benefit from assertion rewriting. Thanks @sober7, @nicoddemus and @flub for the PR.
Change report.outcome for xpassed tests to "passed" in non-strict mode and "failed" in strict mode. Thanks to @hackebrot for the PR (#1795) and @gprasad84 for report (#1546).
Tests marked with xfail(strict=False) (the default) now appear in JUnitXML reports as passing tests instead of skipped. Thanks to @hackebrot for the PR (#1795).
Highlight path of the file location in the error report to make it easier to copy/paste. Thanks @suzaku for the PR (#1778).
Fixtures marked with @pytest.fixture can now use yield statements exactly like those marked with the @pytest.yield_fixture decorator. This change renders @pytest.yield_fixture deprecated and makes @pytest.fixture with yield statements the preferred way to write teardown code (#1461). Thanks @csaftoiu for bringing this to attention and @nicoddemus for the PR.
Explicitly passed parametrize ids do not get escaped to ascii (#1351). Thanks @ceridwen for the PR.
Fixtures are now sorted in the error message displayed when an unknown fixture is declared in a test function. Thanks @nicoddemus for the PR.
pytest_terminal_summary hook now receives the exitstatus of the test session as argument. Thanks @blueyed for the PR (#1809).
Parametrize ids can accept None as specific test id, in which case the automatically generated id for that argument will be used. Thanks @palaviv for the complete PR (#1468).
The parameter to xunit-style setup/teardown methods (setup_method, setup_module, etc.) is now optional and may be omitted. Thanks @okken for bringing this to attention and @nicoddemus for the PR.
Improved automatic id generation selection in case of duplicate ids in parametrize. Thanks @palaviv for the complete PR (#1474).
Now pytest warnings summary is shown up by default. Added a new flag --disable-pytest-warnings to explicitly disable the warnings summary (#1668).
Make ImportError during collection more explicit by reminding the user to check the name of the test module/package(s) (#1426). Thanks @omarkohl for the complete PR (#1520).
Add build/ and dist/ to the default --norecursedirs list. Thanks @mikofski for the report and @tomviner for the PR (#1544).
pytest.raises in the context manager form accepts a custom message to raise when no exception occurred. Thanks @palaviv for the complete PR (#1616).
conftest.py files now benefit from assertion rewriting; previously it was only available for test modules. Thanks @flub, @sober7 and @nicoddemus for the PR (#1619).
Text documents without any doctests no longer appear as “skipped”. Thanks @graingert for reporting and providing a full PR (#1580).
Ensure that a module within a namespace package can be found when it is specified on the command line together with the --pyargs option. Thanks to @taschini for the PR (#1597).
Always include full assertion explanation during assertion rewriting. The previous behaviour was hiding sub-expressions that happened to be False, assuming this was redundant information. Thanks @bagerard for reporting (#1503). Thanks to @davehunt and @tomviner for the PR.
OptionGroup.addoption() now checks if option names were already added before, to make it easier to track down issues like #1618. Before, you only got exceptions later from argparse library, giving no clue about the actual reason for double-added options.
yield-based tests are considered deprecated and will be removed in pytest-4.0. Thanks @nicoddemus for the PR.
[pytest] sections in setup.cfg files should now be named [tool:pytest] to avoid conflicts with other distutils commands (see #567). [pytest] sections in pytest.ini or tox.ini files are supported and unchanged. Thanks @nicoddemus for the PR.
Using pytest_funcarg__ prefix to declare fixtures is considered deprecated and will be removed in pytest-4.0 (#1684). Thanks @nicoddemus for the PR.
Passing a command-line string to pytest.main() is considered deprecated and scheduled for removal in pytest-4.0. It is recommended to pass a list of arguments instead (#1723).
Rename getfuncargvalue to getfixturevalue. getfuncargvalue is still present but is now considered deprecated. Thanks to @RedBeardCode and @tomviner for the PR (#1626).
optparse type usage now triggers DeprecationWarnings (#1740).
optparse backward compatibility supports float/complex types (#457).
Refined logic for determining the rootdir, considering only valid paths which fixes a number of issues: #1594, #1435 and #1471. Updated the documentation according to current behavior. Thanks to @blueyed, @davehunt and @matthiasha for the PR.
Always include full assertion explanation. The previous behaviour was hiding sub-expressions that happened to be False, assuming this was redundant information. Thanks @bagerard for reporting (#1503). Thanks to @davehunt and @tomviner for PR.
Better message in case of not using parametrized variable (see #1539). Thanks to @tramwaj29 for the PR.
Updated docstrings with a more uniform style.
Add stderr write for pytest.exit(msg) during startup. Previously the message was never shown. Thanks @BeyondEvil for reporting #1210. Thanks to @jgsonesen and @tomviner for the PR.
No longer display the incorrect test deselection reason (#1372). Thanks @ronnypfannschmidt for the PR.
The --resultlog command line option has been deprecated: it is little used and there are more modern and better alternatives (see #830). Thanks @nicoddemus for the PR.
Improve error message with fixture lookup errors: add an ‘E’ to the first line and ‘>’ to the rest. Fixes #717. Thanks @blueyed for reporting and a PR, @eolo999 for the initial PR and @tomviner for his guidance during EuroPython2016 sprint.

Bug Fixes

Parametrize now correctly handles duplicated test ids.
Fix internal error issue when the method argument is missing for teardown_method() (#1605).
Fix exception visualization in case the current working directory (CWD) gets deleted during testing (#1235). Thanks @bukzor for reporting. PR by @marscher.
Improve test output for logical expression with brackets (#925). Thanks @DRMacIver for reporting and @RedBeardCode for the PR.
Create correct diff for strings ending with newlines (#1553). Thanks @Vogtinator for reporting and @RedBeardCode and @tomviner for the PR.
ConftestImportFailure now shows the traceback making it easier to identify bugs in conftest.py files (#1516). Thanks @txomon for the PR.
Text documents without any doctests no longer appear as “skipped”. Thanks @graingert for reporting and providing a full PR (#1580).
Fixed collection of classes with custom __new__ method. Fixes #1579. Thanks to @Stranger6667 for the PR.
Fixed scope overriding inside metafunc.parametrize (#634). Thanks to @Stranger6667 for the PR.
Fixed the total tests tally in junit xml output (#1798). Thanks to @cboelsen for the PR.
Fixed off-by-one error with lines from request.node.warn. Thanks to @blueyed for the PR.

2.9.2 (2016-05-31)¶

Bug Fixes

fix #510: skip tests where one parameterize dimension was empty thanks Alex Stapleton for the Report and @RonnyPfannschmidt for the PR
Fix Xfail does not work with condition keyword argument. Thanks @astraw38 for reporting the issue (#1496) and @tomviner for PR the (#1524).
Fix win32 path issue when putting custom config file with absolute path in pytest.main("-c your_absolute_path").
Fix maximum recursion depth detection when raised error class is not aware of unicode/encoded bytes. Thanks @prusse-martin for the PR (#1506).
Fix pytest.mark.skip mark when used in strict mode. Thanks @pquentin for the PR and @RonnyPfannschmidt for showing how to fix the bug.
Minor improvements and fixes to the documentation. Thanks @omarkohl for the PR.
Fix --fixtures to show all fixture definitions as opposed to just one per fixture name. Thanks to @hackebrot for the PR.

2.9.1 (2016-03-17)¶

Bug Fixes

Improve error message when a plugin fails to load. Thanks @nicoddemus for the PR.
Fix (#1178): pytest.fail with non-ascii characters raises an internal pytest error. Thanks @nicoddemus for the PR.
Fix (#469): junit parses report.nodeid incorrectly, when params IDs contain ::. Thanks @tomviner for the PR (#1431).
Fix (#578): SyntaxErrors containing non-ascii lines at the point of failure generated an internal py.test error. Thanks @asottile for the report and @nicoddemus for the PR.
Fix (#1437): When passing in a bytestring regex pattern to parameterize attempt to decode it as utf-8 ignoring errors.
Fix (#649): parametrized test nodes cannot be specified to run on the command line.
Fix (#138): better reporting for python 3.3+ chained exceptions

2.9.0 (2016-02-29)¶

New Features

New pytest.mark.skip mark, which unconditionally skips marked tests. Thanks @MichaelAquilina for the complete PR (#1040).
--doctest-glob may now be passed multiple times in the command-line. Thanks @jab and @nicoddemus for the PR.
New -rp and -rP reporting options give the summary and full output of passing tests, respectively. Thanks to @codewarrior0 for the PR.
pytest.mark.xfail now has a strict option, which makes XPASS tests to fail the test suite (defaulting to False). There’s also a xfail_strict ini option that can be used to configure it project-wise. Thanks @rabbbit for the request and @nicoddemus for the PR (#1355).
Parser.addini now supports options of type bool. Thanks @nicoddemus for the PR.
New ALLOW_BYTES doctest option. This strips b prefixes from byte strings in doctest output (similar to ALLOW_UNICODE). Thanks @jaraco for the request and @nicoddemus for the PR (#1287).
Give a hint on KeyboardInterrupt to use the --fulltrace option to show the errors. Fixes #1366. Thanks to @hpk42 for the report and @RonnyPfannschmidt for the PR.
Catch IndexError exceptions when getting exception source location. Fixes a pytest internal error for dynamically generated code (fixtures and tests) where source lines are fake by intention.

Changes

Important: py.code has been merged into the pytest repository as pytest._code. This decision was made because py.code had very few uses outside pytest and the fact that it was in a different repository made it difficult to fix bugs on its code in a timely manner. The team hopes with this to be able to better refactor out and improve that code. This change shouldn’t affect users, but it is useful to let users aware if they encounter any strange behavior.

Keep in mind that the code for pytest._code is private and experimental, so you definitely should not import it explicitly!

Please note that the original py.code is still available in pylib.
pytest_enter_pdb now optionally receives the pytest config object. Thanks @nicoddemus for the PR.
Removed code and documentation for Python 2.5 or lower versions, including removal of the obsolete _pytest.assertion.oldinterpret module. Thanks @nicoddemus for the PR (#1226).
Comparisons now always show up in full when CI or BUILD_NUMBER is found in the environment, even when -vv isn’t used. Thanks @The-Compiler for the PR.
--lf and --ff now support long names: --last-failed and --failed-first respectively. Thanks @MichaelAquilina for the PR.
Added expected exceptions to pytest.raises fail message.
Collection only displays progress (“collecting X items”) when in a terminal. This avoids cluttering the output when using --color=yes to obtain colors in CI integrations systems (#1397).

Bug Fixes

The -s and -c options should now work under xdist; Config.fromdictargs now represents its input much more faithfully. Thanks to @bukzor for the complete PR (#680).
Fix (#1290): support Python 3.5’s @ operator in assertion rewriting. Thanks @Shinkenjoe for report with test case and @tomviner for the PR.
Fix formatting utf-8 explanation messages (#1379). Thanks @biern for the PR.
Fix traceback style docs to describe all of the available options (auto/long/short/line/native/no), with auto being the default since v2.6. Thanks @hackebrot for the PR.
Fix (#1422): junit record_xml_property doesn’t allow multiple records with same name.

2.8.7 (2016-01-24)¶

fix #1338: use predictable object resolution for monkeypatch

2.8.6 (2016-01-21)¶

fix #1259: allow for double nodeids in junitxml, this was a regression failing plugins combinations like pytest-pep8 + pytest-flakes
Workaround for exception that occurs in pyreadline when using --pdb with standard I/O capture enabled. Thanks Erik M. Bray for the PR.
fix #900: Better error message in case the target of a monkeypatch call raises an ImportError.
fix #1292: monkeypatch calls (setattr, setenv, etc.) are now O(1). Thanks David R. MacIver for the report and Bruno Oliveira for the PR.
fix #1223: captured stdout and stderr are now properly displayed before entering pdb when --pdb is used instead of being thrown away. Thanks Cal Leeming for the PR.
fix #1305: pytest warnings emitted during pytest_terminal_summary are now properly displayed. Thanks Ionel Maries Cristian for the report and Bruno Oliveira for the PR.
fix #628: fixed internal UnicodeDecodeError when doctests contain unicode. Thanks Jason R. Coombs for the report and Bruno Oliveira for the PR.
fix #1334: Add captured stdout to jUnit XML report on setup error. Thanks Georgy Dyuldin for the PR.

2.8.5 (2015-12-11)¶

fix #1243: fixed issue where class attributes injected during collection could break pytest. PR by Alexei Kozlenok, thanks Ronny Pfannschmidt and Bruno Oliveira for the review and help.
fix #1074: precompute junitxml chunks instead of storing the whole tree in objects Thanks Bruno Oliveira for the report and Ronny Pfannschmidt for the PR
fix #1238: fix pytest.deprecated_call() receiving multiple arguments (Regression introduced in 2.8.4). Thanks Alex Gaynor for the report and Bruno Oliveira for the PR.

2.8.4 (2015-12-06)¶

fix #1190: deprecated_call() now works when the deprecated function has been already called by another test in the same module. Thanks Mikhail Chernykh for the report and Bruno Oliveira for the PR.
fix #1198: --pastebin option now works on Python 3. Thanks Mehdy Khoshnoody for the PR.
fix #1219: --pastebin now works correctly when captured output contains non-ascii characters. Thanks Bruno Oliveira for the PR.
fix #1204: another error when collecting with a nasty __getattr__(). Thanks Florian Bruhin for the PR.
fix the summary printed when no tests did run. Thanks Florian Bruhin for the PR.
fix #1185 - ensure MANIFEST.in exactly matches what should go to a sdist
a number of documentation modernizations wrt good practices. Thanks Bruno Oliveira for the PR.

2.8.3 (2015-11-18)¶

fix #1169: add __name__ attribute to testcases in TestCaseFunction to support the @unittest.skip decorator on functions and methods. Thanks Lee Kamentsky for the PR.
fix #1035: collecting tests if test module level obj has __getattr__(). Thanks Suor for the report and Bruno Oliveira / Tom Viner for the PR.
fix #331: don’t collect tests if their failure cannot be reported correctly e.g. they are a callable instance of a class.
fix #1133: fixed internal error when filtering tracebacks where one entry belongs to a file which is no longer available. Thanks Bruno Oliveira for the PR.
enhancement made to highlight in red the name of the failing tests so they stand out in the output. Thanks Gabriel Reis for the PR.
add more talks to the documentation
extend documentation on the –ignore cli option
use pytest-runner for setuptools integration
minor fixes for interaction with OS X El Capitan system integrity protection (thanks Florian)

2.8.2 (2015-10-07)¶

fix #1085: proper handling of encoding errors when passing encoded byte strings to pytest.parametrize in Python 2. Thanks Themanwithoutaplan for the report and Bruno Oliveira for the PR.
fix #1087: handling SystemError when passing empty byte strings to pytest.parametrize in Python 3. Thanks Paul Kehrer for the report and Bruno Oliveira for the PR.
fix #995: fixed internal error when filtering tracebacks where one entry was generated by an exec() statement. Thanks Daniel Hahler, Ashley C Straw, Philippe Gauthier and Pavel Savchenko for contributing and Bruno Oliveira for the PR.
fix #1100 and #1057: errors when using autouse fixtures and doctest modules. Thanks Sergey B Kirpichev and Vital Kudzelka for contributing and Bruno Oliveira for the PR.

2.8.1 (2015-09-29)¶

fix #1034: Add missing nodeid on pytest_logwarning call in addhook. Thanks Simon Gomizelj for the PR.
‘deprecated_call’ is now only satisfied with a DeprecationWarning or PendingDeprecationWarning. Before 2.8.0, it accepted any warning, and 2.8.0 made it accept only DeprecationWarning (but not PendingDeprecationWarning). Thanks Alex Gaynor for the issue and Eric Hunsberger for the PR.
fix issue #1073: avoid calling __getattr__ on potential plugin objects. This fixes an incompatibility with pytest-django. Thanks Andreas Pelme, Bruno Oliveira and Ronny Pfannschmidt for contributing and Holger Krekel for the fix.
Fix issue #704: handle versionconflict during plugin loading more gracefully. Thanks Bruno Oliveira for the PR.
Fix issue #1064: “”–junitxml” regression when used with the “pytest-xdist” plugin, with test reports being assigned to the wrong tests. Thanks Daniel Grunwald for the report and Bruno Oliveira for the PR.
(experimental) adapt more SEMVER style versioning and change meaning of master branch in git repo: “master” branch now keeps the bug fixes, changes aimed for micro releases. “features” branch will only be released with minor or major pytest releases.
Fix issue #766 by removing documentation references to distutils. Thanks Russel Winder.
Fix issue #1030: now byte-strings are escaped to produce item node ids to make them always serializable. Thanks Andy Freeland for the report and Bruno Oliveira for the PR.
Python 2: if unicode parametrized values are convertible to ascii, their ascii representation is used for the node id.
Fix issue #411: Add __eq__ method to assertion comparison example. Thanks Ben Webb.
Fix issue #653: deprecated_call can be used as context manager.
fix issue 877: properly handle assertion explanations with non-ascii repr Thanks Mathieu Agopian for the report and Ronny Pfannschmidt for the PR.
fix issue 1029: transform errors when writing cache values into pytest-warnings

2.8.0 (2015-09-18)¶

new --lf and -ff options to run only the last failing tests or “failing tests first” from the last run. This functionality is provided through porting the formerly external pytest-cache plugin into pytest core. BACKWARD INCOMPAT: if you used pytest-cache’s functionality to persist data between test runs be aware that we don’t serialize sets anymore. Thanks Ronny Pfannschmidt for most of the merging work.
“-r” option now accepts “a” to include all possible reports, similar to passing “fEsxXw” explicitly (issue960). Thanks Abhijeet Kasurde for the PR.
avoid python3.5 deprecation warnings by introducing version specific inspection helpers, thanks Michael Droettboom.
fix issue562: @nose.tools.istest now fully respected.
fix issue934: when string comparison fails and a diff is too large to display without passing -vv, still show a few lines of the diff. Thanks Florian Bruhin for the report and Bruno Oliveira for the PR.
fix issue736: Fix a bug where fixture params would be discarded when combined with parametrization markers. Thanks to Markus Unterwaditzer for the PR.
fix issue710: introduce ALLOW_UNICODE doctest option: when enabled, the u prefix is stripped from unicode strings in expected doctest output. This allows doctests which use unicode to run in Python 2 and 3 unchanged. Thanks Jason R. Coombs for the report and Bruno Oliveira for the PR.
parametrize now also generates meaningful test IDs for enum, regex and class objects (as opposed to class instances). Thanks to Florian Bruhin for the PR.
Add ‘warns’ to assert that warnings are thrown (like ‘raises’). Thanks to Eric Hunsberger for the PR.
Fix issue683: Do not apply an already applied mark. Thanks ojake for the PR.
Deal with capturing failures better so fewer exceptions get lost to /dev/null. Thanks David Szotten for the PR.
fix issue730: deprecate and warn about the –genscript option. Thanks Ronny Pfannschmidt for the report and Christian Pommranz for the PR.
fix issue751: multiple parametrize with ids bug if it parametrizes class with two or more test methods. Thanks Sergey Chipiga for reporting and Jan Bednarik for PR.
fix issue82: avoid loading conftest files from setup.cfg/pytest.ini/tox.ini files and upwards by default (–confcutdir can still be set to override this). Thanks Bruno Oliveira for the PR.
fix issue768: docstrings found in python modules were not setting up session fixtures. Thanks Jason R. Coombs for reporting and Bruno Oliveira for the PR.
added tmpdir_factory, a session-scoped fixture that can be used to create directories under the base temporary directory. Previously this object was installed as a _tmpdirhandler attribute of the config object, but now it is part of the official API and using config._tmpdirhandler is deprecated. Thanks Bruno Oliveira for the PR.
fix issue808: pytest’s internal assertion rewrite hook now implements the optional PEP 302 get_data API so tests can access data files next to them. Thanks xmo-odoo for request and example and Bruno Oliveira for the PR.
rootdir and inifile are now displayed during usage errors to help users diagnose problems such as unexpected ini files which add unknown options being picked up by pytest. Thanks to Pavel Savchenko for bringing the problem to attention in #821 and Bruno Oliveira for the PR.
Summary bar now is colored yellow for warning situations such as: all tests either were skipped or xpass/xfailed, or no tests were run at all (this is a partial fix for issue500).
fix issue812: pytest now exits with status code 5 in situations where no tests were run at all, such as the directory given in the command line does not contain any tests or as result of a command line option filters all out all tests (-k for example). Thanks Eric Siegerman (issue812) and Bruno Oliveira for the PR.
Summary bar now is colored yellow for warning situations such as: all tests either were skipped or xpass/xfailed, or no tests were run at all (related to issue500). Thanks Eric Siegerman.
New testpaths ini option: list of directories to search for tests when executing pytest from the root directory. This can be used to speed up test collection when a project has well specified directories for tests, being usually more practical than configuring norecursedirs for all directories that do not contain tests. Thanks to Adrian for idea (#694) and Bruno Oliveira for the PR.
fix issue713: JUnit XML reports for doctest failures. Thanks Punyashloka Biswal.
fix issue970: internal pytest warnings now appear as “pytest-warnings” in the terminal instead of “warnings”, so it is clear for users that those warnings are from pytest and not from the builtin “warnings” module. Thanks Bruno Oliveira.
Include setup and teardown in junitxml test durations. Thanks Janne Vanhala.
fix issue735: assertion failures on debug versions of Python 3.4+
new option --import-mode to allow to change test module importing behaviour to append to sys.path instead of prepending. This better allows to run test modules against installed versions of a package even if the package under test has the same import root. In this example:
```
testing/__init__.py
testing/test_pkg_under_test.py
pkg_under_test/
```
the tests will run against the installed version of pkg_under_test when --import-mode=append is used whereas by default they would always pick up the local version. Thanks Holger Krekel.
pytester: add method TmpTestdir.delete_loaded_modules(), and call it from inline_run() to allow temporary modules to be reloaded. Thanks Eduardo Schettino.
internally refactor pluginmanager API and code so that there is a clear distinction between a pytest-agnostic rather simple pluginmanager and the PytestPluginManager which adds a lot of behaviour, among it handling of the local conftest files. In terms of documented methods this is a backward compatible change but it might still break 3rd party plugins which relied on details like especially the pluginmanager.add_shutdown() API. Thanks Holger Krekel.
pluginmanagement: introduce pytest.hookimpl and pytest.hookspec decorators for setting impl/spec specific parameters. This substitutes the previous now deprecated use of pytest.mark which is meant to contain markers for test functions only.
write/refine docs for “writing plugins” which now have their own page and are separate from the “using/installing plugins`` page.
fix issue732: properly unregister plugins from any hook calling sites allowing to have temporary plugins during test execution.
deprecate and warn about __multicall__ argument in hook implementations. Use the hookwrapper mechanism instead already introduced with pytest-2.7.
speed up pytest’s own test suite considerably by using inprocess tests by default (testrun can be modified with –runpytest=subprocess to create subprocesses in many places instead). The main APIs to run pytest in a test is “runpytest()” or “runpytest_subprocess” and “runpytest_inprocess” if you need a particular way of running the test. In all cases you get back a RunResult but the inprocess one will also have a “reprec” attribute with the recorded events/reports.
fix monkeypatch.setattr(“x.y”, raising=False) to actually not raise if “y” is not a preexisting attribute. Thanks Florian Bruhin.
fix issue741: make running output from testdir.run copy/pasteable Thanks Bruno Oliveira.
add a new --noconftest argument which ignores all conftest.py files.
add file and line attributes to JUnit-XML output.
fix issue890: changed extension of all documentation files from txt to rst. Thanks to Abhijeet for the PR.
fix issue714: add ability to apply indirect=True parameter on particular argnames. Thanks Elizaveta239.
fix issue890: changed extension of all documentation files from txt to rst. Thanks to Abhijeet for the PR.
fix issue957: “# doctest: SKIP” option will now register doctests as SKIPPED rather than PASSED. Thanks Thomas Grainger for the report and Bruno Oliveira for the PR.
issue951: add new record_xml_property fixture, that supports logging additional information on xml output. Thanks David Diaz for the PR.
issue949: paths after normal options (for example -s, -v, etc) are now properly used to discover rootdir and ini files. Thanks Peter Lauri for the report and Bruno Oliveira for the PR.

2.7.3 (2015-09-15)¶

Allow ‘dev’, ‘rc’, or other non-integer version strings in importorskip. Thanks to Eric Hunsberger for the PR.
fix issue856: consider –color parameter in all outputs (for example –fixtures). Thanks Barney Gale for the report and Bruno Oliveira for the PR.
fix issue855: passing str objects as plugins argument to pytest.main is now interpreted as a module name to be imported and registered as a plugin, instead of silently having no effect. Thanks xmo-odoo for the report and Bruno Oliveira for the PR.
fix issue744: fix for ast.Call changes in Python 3.5+. Thanks Guido van Rossum, Matthias Bussonnier, Stefan Zimmermann and Thomas Kluyver.
fix issue842: applying markers in classes no longer propagate this markers to superclasses which also have markers. Thanks xmo-odoo for the report and Bruno Oliveira for the PR.
preserve warning functions after call to pytest.deprecated_call. Thanks Pieter Mulder for PR.
fix issue854: autouse yield_fixtures defined as class members of unittest.TestCase subclasses now work as expected. Thanks xmo-odoo for the report and Bruno Oliveira for the PR.
fix issue833: –fixtures now shows all fixtures of collected test files, instead of just the fixtures declared on the first one. Thanks Florian Bruhin for reporting and Bruno Oliveira for the PR.
fix issue863: skipped tests now report the correct reason when a skip/xfail condition is met when using multiple markers. Thanks Raphael Pierzina for reporting and Bruno Oliveira for the PR.
optimized tmpdir fixture initialization, which should make test sessions faster (specially when using pytest-xdist). The only visible effect is that now pytest uses a subdirectory in the $TEMP directory for all directories created by this fixture (defaults to $TEMP/pytest-$USER). Thanks Bruno Oliveira for the PR.

2.7.2 (2015-06-23)¶

fix issue767: pytest.raises value attribute does not contain the exception instance on Python 2.6. Thanks Eric Siegerman for providing the test case and Bruno Oliveira for PR.
Automatically create directory for junitxml and results log. Thanks Aron Curzon.
fix issue713: JUnit XML reports for doctest failures. Thanks Punyashloka Biswal.
fix issue735: assertion failures on debug versions of Python 3.4+ Thanks Benjamin Peterson.
fix issue114: skipif marker reports to internal skipping plugin; Thanks Floris Bruynooghe for reporting and Bruno Oliveira for the PR.
fix issue748: unittest.SkipTest reports to internal pytest unittest plugin. Thanks Thomas De Schampheleire for reporting and Bruno Oliveira for the PR.
fix issue718: failed to create representation of sets containing unsortable elements in python 2. Thanks Edison Gustavo Muenz.
fix issue756, fix issue752 (and similar issues): depend on py-1.4.29 which has a refined algorithm for traceback generation.

2.7.1 (2015-05-19)¶

fix issue731: do not get confused by the braces which may be present and unbalanced in an object’s repr while collapsing False explanations. Thanks Carl Meyer for the report and test case.
fix issue553: properly handling inspect.getsourcelines failures in FixtureLookupError which would lead to an internal error, obfuscating the original problem. Thanks talljosh for initial diagnose/patch and Bruno Oliveira for final patch.
fix issue660: properly report scope-mismatch-access errors independently from ordering of fixture arguments. Also avoid the pytest internal traceback which does not provide information to the user. Thanks Holger Krekel.
streamlined and documented release process. Also all versions (in setup.py and documentation generation) are now read from _pytest/__init__.py. Thanks Holger Krekel.
fixed docs to remove the notion that yield-fixtures are experimental. They are here to stay :) Thanks Bruno Oliveira.
Support building wheels by using environment markers for the requirements. Thanks Ionel Maries Cristian.
fixed regression to 2.6.4 which surfaced e.g. in lost stdout capture printing when tests raised SystemExit. Thanks Holger Krekel.
reintroduced _pytest fixture of the pytester plugin which is used at least by pytest-xdist.

2.7.0 (2015-03-26)¶

fix issue435: make reload() work when assert rewriting is active. Thanks Daniel Hahler.
fix issue616: conftest.py files and their contained fixtures are now properly considered for visibility, independently from the exact current working directory and test arguments that are used. Many thanks to Eric Siegerman and his PR235 which contains systematic tests for conftest visibility and now passes. This change also introduces the concept of a rootdir which is printed as a new pytest header and documented in the pytest customize web page.
change reporting of “diverted” tests, i.e. tests that are collected in one file but actually come from another (e.g. when tests in a test class come from a base class in a different file). We now show the nodeid and indicate via a postfix the other file.
add ability to set command line options by environment variable PYTEST_ADDOPTS.
added documentation on the new pytest-dev teams on bitbucket and github. See https://pytest.org/en/stable/contributing.html . Thanks to Anatoly for pushing and initial work on this.
fix issue650: new option --doctest-ignore-import-errors which will turn import errors in doctests into skips. Thanks Charles Cloud for the complete PR.
fix issue655: work around different ways that cause python2/3 to leak sys.exc_info into fixtures/tests causing failures in 3rd party code
fix issue615: assertion rewriting did not correctly escape % signs when formatting boolean operations, which tripped over mixing booleans with modulo operators. Thanks to Tom Viner for the report, triaging and fix.
implement issue351: add ability to specify parametrize ids as a callable to generate custom test ids. Thanks Brianna Laugher for the idea and implementation.
introduce and document new hookwrapper mechanism useful for plugins which want to wrap the execution of certain hooks for their purposes. This supersedes the undocumented __multicall__ protocol which pytest itself and some external plugins use. Note that pytest-2.8 is scheduled to drop supporting the old __multicall__ and only support the hookwrapper protocol.
majorly speed up invocation of plugin hooks
use hookwrapper mechanism in builtin pytest plugins.
add a doctest ini option for doctest flags, thanks Holger Peters.
add note to docs that if you want to mark a parameter and the parameter is a callable, you also need to pass in a reason to disambiguate it from the “decorator” case. Thanks Tom Viner.
“python_classes” and “python_functions” options now support glob-patterns for test discovery, as discussed in issue600. Thanks Ldiary Translations.
allow to override parametrized fixtures with non-parametrized ones and vice versa (bubenkoff).
fix issue463: raise specific error for ‘parameterize’ misspelling (pfctdayelise).
On failure, the sys.last_value, sys.last_type and sys.last_traceback are set, so that a user can inspect the error via postmortem debugging (almarklein).

2.6.4 (2014-10-24)¶

Improve assertion failure reporting on iterables, by using ndiff and pprint.
removed outdated japanese docs from source tree.
docs for “pytest_addhooks” hook. Thanks Bruno Oliveira.
updated plugin index docs. Thanks Bruno Oliveira.
fix issue557: with “-k” we only allow the old style “-” for negation at the beginning of strings and even that is deprecated. Use “not” instead. This should allow to pick parametrized tests where “-” appeared in the parameter.
fix issue604: Escape % character in the assertion message.
fix issue620: add explanation in the –genscript target about what the binary blob means. Thanks Dinu Gherman.
fix issue614: fixed pastebin support.
fix issue620: add explanation in the –genscript target about what the binary blob means. Thanks Dinu Gherman.
fix issue614: fixed pastebin support.

2.6.3 (2014-09-24)¶

fix issue575: xunit-xml was reporting collection errors as failures instead of errors, thanks Oleg Sinyavskiy.
fix issue582: fix setuptools example, thanks Laszlo Papp and Ronny Pfannschmidt.
Fix infinite recursion bug when pickling capture.EncodedFile, thanks Uwe Schmitt.
fix issue589: fix bad interaction with numpy and others when showing exceptions. Check for precise “maximum recursion depth exceed” exception instead of presuming any RuntimeError is that one (implemented in py dep). Thanks Charles Cloud for analysing the issue.
fix conftest related fixture visibility issue: when running with a CWD outside of a test package pytest would get fixture discovery wrong. Thanks to Wolfgang Schnerring for figuring out a reproducible example.
Introduce pytest_enter_pdb hook (needed e.g. by pytest_timeout to cancel the timeout when interactively entering pdb). Thanks Wolfgang Schnerring.
check xfail/skip also with non-python function test items. Thanks Floris Bruynooghe.

2.6.2 (2014-09-05)¶

Added function pytest.freeze_includes(), which makes it easy to embed pytest into executables using tools like cx_freeze. See docs for examples and rationale. Thanks Bruno Oliveira.
Improve assertion rewriting cache invalidation precision.
fixed issue561: adapt autouse fixture example for python3.
fixed issue453: assertion rewriting issue with __repr__ containing “n{”, “n}” and “n~”.
fix issue560: correctly display code if an “else:” or “finally:” is followed by statements on the same line.
Fix example in monkeypatch documentation, thanks t-8ch.
fix issue572: correct tmpdir doc example for python3.
Do not mark as universal wheel because Python 2.6 is different from other builds due to the extra argparse dependency. Fixes issue566. Thanks sontek.
Implement issue549: user-provided assertion messages now no longer replace the py.test introspection message but are shown in addition to them.

2.6.1 (2014-08-07)¶

No longer show line numbers in the –verbose output, the output is now purely the nodeid. The line number is still shown in failure reports. Thanks Floris Bruynooghe.
fix issue437 where assertion rewriting could cause pytest-xdist worker nodes to collect different tests. Thanks Bruno Oliveira.
fix issue555: add “errors” attribute to capture-streams to satisfy some distutils and possibly other code accessing sys.stdout.errors.
fix issue547 capsys/capfd also work when output capturing (“-s”) is disabled.
address issue170: allow pytest.mark.xfail(…) to specify expected exceptions via an optional “raises=EXC” argument where EXC can be a single exception or a tuple of exception classes. Thanks David Mohr for the complete PR.
fix integration of pytest with unittest.mock.patch decorator when it uses the “new” argument. Thanks Nicolas Delaby for test and PR.
fix issue with detecting conftest files if the arguments contain “::” node id specifications (copy pasted from “-v” output)
fix issue544 by only removing “@NUM” at the end of “::” separated parts and if the part has a “.py” extension
don’t use py.std import helper, rather import things directly. Thanks Bruno Oliveira.

2.6¶

Cache exceptions from fixtures according to their scope (issue 467).
fix issue537: Avoid importing old assertion reinterpretation code by default.
fix issue364: shorten and enhance tracebacks representation by default. The new “–tb=auto” option (default) will only display long tracebacks for the first and last entry. You can get the old behaviour of printing all entries as long entries with “–tb=long”. Also short entries by default are now printed very similarly to “–tb=native” ones.
fix issue514: teach assertion reinterpretation about private class attributes
change -v output to include full node IDs of tests. Users can copy a node ID from a test run, including line number, and use it as a positional argument in order to run only a single test.
fix issue 475: fail early and comprehensible if calling pytest.raises with wrong exception type.
fix issue516: tell in getting-started about current dependencies.
cleanup setup.py a bit and specify supported versions. Thanks Jurko Gospodnetic for the PR.
change XPASS colour to yellow rather than red when tests are run with -v.
fix issue473: work around mock putting an unbound method into a class dict when double-patching.
fix issue498: if a fixture finalizer fails, make sure that the fixture is still invalidated.
fix issue453: the result of the pytest_assertrepr_compare hook now gets it’s newlines escaped so that format_exception does not blow up.
internal new warning system: pytest will now produce warnings when it detects oddities in your test collection or execution. Warnings are ultimately sent to a new pytest_logwarning hook which is currently only implemented by the terminal plugin which displays warnings in the summary line and shows more details when -rw (report on warnings) is specified.
change skips into warnings for test classes with an __init__ and callables in test modules which look like a test but are not functions.
fix issue436: improved finding of initial conftest files from command line arguments by using the result of parse_known_args rather than the previous flaky heuristics. Thanks Marc Abramowitz for tests and initial fixing approaches in this area.
fix issue #479: properly handle nose/unittest(2) SkipTest exceptions during collection/loading of test modules. Thanks to Marc Schlaich for the complete PR.
fix issue490: include pytest_load_initial_conftests in documentation and improve docstring.
fix issue472: clarify that pytest.config.getvalue() cannot work if it’s triggered ahead of command line parsing.
merge PR123: improved integration with mock.patch decorator on tests.
fix issue412: messing with stdout/stderr FD-level streams is now captured without crashes.
fix issue483: trial/py33 works now properly. Thanks Daniel Grana for PR.
improve example for pytest integration with “python setup.py test” which now has a generic “-a” or “–pytest-args” option where you can pass additional options as a quoted string. Thanks Trevor Bekolay.
simplified internal capturing mechanism and made it more robust against tests or setups changing FD1/FD2, also better integrated now with pytest.pdb() in single tests.
improvements to pytest’s own test-suite leakage detection, courtesy of PRs from Marc Abramowitz
fix issue492: avoid leak in test_writeorg. Thanks Marc Abramowitz.
fix issue493: don’t run tests in doc directory with python setup.py test (use tox -e doctesting for that)
fix issue486: better reporting and handling of early conftest loading failures
some cleanup and simplification of internal conftest handling.
work a bit harder to break reference cycles when catching exceptions. Thanks Jurko Gospodnetic.
fix issue443: fix skip examples to use proper comparison. Thanks Alex Groenholm.
support nose-style __test__ attribute on modules, classes and functions, including unittest-style Classes. If set to False, the test will not be collected.
fix issue512: show “<notset>” for arguments which might not be set in monkeypatch plugin. Improves output in documentation.

2.5.2 (2014-01-29)¶

fix issue409 – better interoperate with cx_freeze by not trying to import from collections.abc which causes problems for py27/cx_freeze. Thanks Wolfgang L. for reporting and tracking it down.
fixed docs and code to use “pytest” instead of “py.test” almost everywhere. Thanks Jurko Gospodnetic for the complete PR.
fix issue425: mention at end of “py.test -h” that –markers and –fixtures work according to specified test path (or current dir)
fix issue413: exceptions with unicode attributes are now printed correctly also on python2 and with pytest-xdist runs. (the fix requires py-1.4.20)
copy, cleanup and integrate py.io capture from pylib 1.4.20.dev2 (rev 13d9af95547e)
address issue416: clarify docs as to conftest.py loading semantics
fix issue429: comparing byte strings with non-ascii chars in assert expressions now work better. Thanks Floris Bruynooghe.
make capfd/capsys.capture private, its unused and shouldn’t be exposed

2.5.1 (2013-12-17)¶

merge new documentation styling PR from Tobias Bieniek.
fix issue403: allow parametrize of multiple same-name functions within a collection node. Thanks Andreas Kloeckner and Alex Gaynor for reporting and analysis.
Allow parameterized fixtures to specify the ID of the parameters by adding an ids argument to pytest.fixture() and pytest.yield_fixture(). Thanks Floris Bruynooghe.
fix issue404 by always using the binary xml escape in the junitxml plugin. Thanks Ronny Pfannschmidt.
fix issue407: fix addoption docstring to point to argparse instead of optparse. Thanks Daniel D. Wright.

2.5.0 (2013-12-12)¶

dropped python2.5 from automated release testing of pytest itself which means it’s probably going to break soon (but still works with this release we believe).
simplified and fixed implementation for calling finalizers when parametrized fixtures or function arguments are involved. finalization is now performed lazily at setup time instead of in the “teardown phase”. While this might sound odd at first, it helps to ensure that we are correctly handling setup/teardown even in complex code. User-level code should not be affected unless it’s implementing the pytest_runtest_teardown hook and expecting certain fixture instances are torn down within (very unlikely and would have been unreliable anyway).
PR90: add –color=yes|no|auto option to force terminal coloring mode (“auto” is default). Thanks Marc Abramowitz.
fix issue319 - correctly show unicode in assertion errors. Many thanks to Floris Bruynooghe for the complete PR. Also means we depend on py>=1.4.19 now.
fix issue396 - correctly sort and finalize class-scoped parametrized tests independently from number of methods on the class.
refix issue323 in a better way – parametrization should now never cause Runtime Recursion errors because the underlying algorithm for re-ordering tests per-scope/per-fixture is not recursive anymore (it was tail-call recursive before which could lead to problems for more than >966 non-function scoped parameters).
fix issue290 - there is preliminary support now for parametrizing with repeated same values (sometimes useful to test if calling a second time works as with the first time).
close issue240 - document precisely how pytest module importing works, discuss the two common test directory layouts, and how it interacts with PEP 420-namespace packages.
fix issue246 fix finalizer order to be LIFO on independent fixtures depending on a parametrized higher-than-function scoped fixture. (was quite some effort so please bear with the complexity of this sentence :) Thanks Ralph Schmitt for the precise failure example.
fix issue244 by implementing special index for parameters to only use indices for parametrized test ids
fix issue287 by running all finalizers but saving the exception from the first failing finalizer and re-raising it so teardown will still have failed. We reraise the first failing exception because it might be the cause for other finalizers to fail.
fix ordering when mock.patch or other standard decorator-wrappings are used with test methods. This fixes issue346 and should help with random “xdist” collection failures. Thanks to Ronny Pfannschmidt and Donald Stufft for helping to isolate it.
fix issue357 - special case “-k” expressions to allow for filtering with simple strings that are not valid python expressions. Examples: “-k 1.3” matches all tests parametrized with 1.3. “-k None” filters all tests that have “None” in their name and conversely “-k ‘not None’”. Previously these examples would raise syntax errors.
fix issue384 by removing the trial support code since the unittest compat enhancements allow trial to handle it on its own
don’t hide an ImportError when importing a plugin produces one. fixes issue375.
fix issue275 - allow usefixtures and autouse fixtures for running doctest text files.
fix issue380 by making –resultlog only rely on longrepr instead of the “reprcrash” attribute which only exists sometimes.
address issue122: allow @pytest.fixture(params=iterator) by exploding into a list early on.
fix pexpect-3.0 compatibility for pytest’s own tests. (fixes issue386)
allow nested parametrize-value markers, thanks James Lan for the PR.
fix unicode handling with new monkeypatch.setattr(import_path, value) API. Thanks Rob Dennis. Fixes issue371.
fix unicode handling with junitxml, fixes issue368.
In assertion rewriting mode on Python 2, fix the detection of coding cookies. See issue #330.
make “–runxfail” turn imperative pytest.xfail calls into no ops (it already did neutralize pytest.mark.xfail markers)
refine pytest / pkg_resources interactions: The AssertionRewritingHook PEP 302 compliant loader now registers itself with setuptools/pkg_resources properly so that the pkg_resources.resource_stream method works properly. Fixes issue366. Thanks for the investigations and full PR to Jason R. Coombs.
pytestconfig fixture is now session-scoped as it is the same object during the whole test run. Fixes issue370.
avoid one surprising case of marker malfunction/confusion:
```
@pytest.mark.some(lambda arg: ...)
def test_function():
```
would not work correctly because pytest assumes @pytest.mark.some gets a function to be decorated already. We now at least detect if this arg is a lambda and thus the example will work. Thanks Alex Gaynor for bringing it up.
xfail a test on pypy that checks wrong encoding/ascii (pypy does not error out). fixes issue385.
internally make varnames() deal with classes’s __init__, although it’s not needed by pytest itself atm. Also fix caching. Fixes issue376.
fix issue221 - handle importing of namespace-package with no __init__.py properly.
refactor internal FixtureRequest handling to avoid monkeypatching. One of the positive user-facing effects is that the “request” object can now be used in closures.
fixed version comparison in pytest.importskip(modname, minverstring)
fix issue377 by clarifying in the nose-compat docs that pytest does not duplicate the unittest-API into the “plain” namespace.
fix verbose reporting for @mock’d test functions

2.4.2 (2013-10-04)¶

on Windows require colorama and a newer py lib so that py.io.TerminalWriter() now uses colorama instead of its own ctypes hacks. (fixes issue365) thanks Paul Moore for bringing it up.
fix “-k” matching of tests where “repr” and “attr” and other names would cause wrong matches because of an internal implementation quirk (don’t ask) which is now properly implemented. fixes issue345.
avoid tmpdir fixture to create too long filenames especially when parametrization is used (issue354)
fix pytest-pep8 and pytest-flakes / pytest interactions (collection names in mark plugin was assuming an item always has a function which is not true for those plugins etc.) Thanks Andi Zeidler.
introduce node.get_marker/node.add_marker API for plugins like pytest-pep8 and pytest-flakes to avoid the messy details of the node.keywords pseudo-dicts. Adapted docs.
remove attempt to “dup” stdout at startup as it’s icky. the normal capturing should catch enough possibilities of tests messing up standard FDs.
add pluginmanager.do_configure(config) as a link to config.do_configure() for plugin-compatibility

2.4.1 (2013-10-02)¶

When using parser.addoption() unicode arguments to the “type” keyword should also be converted to the respective types. thanks Floris Bruynooghe, @dnozay. (fixes issue360 and issue362)
fix dotted filename completion when using argcomplete thanks Anthon van der Neuth. (fixes issue361)
fix regression when a 1-tuple (“arg”,) is used for specifying parametrization (the values of the parametrization were passed nested in a tuple). Thanks Donald Stufft.
merge doc typo fixes, thanks Andy Dirnberger

2.4¶

known incompatibilities:

if calling –genscript from python2.7 or above, you only get a standalone script which works on python2.7 or above. Use Python2.6 to also get a python2.5 compatible version.
all xunit-style teardown methods (nose-style, pytest-style, unittest-style) will not be called if the corresponding setup method failed, see issue322 below.
the pytest_plugin_unregister hook wasn’t ever properly called and there is no known implementation of the hook - so it got removed.
pytest.fixture-decorated functions cannot be generators (i.e. use yield) anymore. This change might be reversed in 2.4.1 if it causes unforeseen real-life issues. However, you can always write and return an inner function/generator and change the fixture consumer to iterate over the returned generator. This change was done in lieu of the new pytest.yield_fixture decorator, see below.

new features:

experimentally introduce a new pytest.yield_fixture decorator which accepts exactly the same parameters as pytest.fixture but mandates a yield statement instead of a return statement from fixture functions. This allows direct integration with “with-style” context managers in fixture functions and generally avoids registering of finalization callbacks in favour of treating the “after-yield” as teardown code. Thanks Andreas Pelme, Vladimir Keleshev, Floris Bruynooghe, Ronny Pfannschmidt and many others for discussions.
allow boolean expression directly with skipif/xfail if a “reason” is also specified. Rework skipping documentation to recommend “condition as booleans” because it prevents surprises when importing markers between modules. Specifying conditions as strings will remain fully supported.
reporting: color the last line red or green depending if failures/errors occurred or everything passed. thanks Christian Theunert.
make “import pdb ; pdb.set_trace()” work natively wrt capturing (no “-s” needed anymore), making pytest.set_trace() a mere shortcut.
fix issue181: –pdb now also works on collect errors (and on internal errors) . This was implemented by a slight internal refactoring and the introduction of a new hook pytest_exception_interact hook (see next item).
fix issue341: introduce new experimental hook for IDEs/terminals to intercept debugging: pytest_exception_interact(node, call, report).
new monkeypatch.setattr() variant to provide a shorter invocation for patching out classes/functions from modules:

monkeypatch.setattr(“requests.get”, myfunc)

will replace the “get” function of the “requests” module with myfunc.
fix issue322: tearDownClass is not run if setUpClass failed. Thanks Mathieu Agopian for the initial fix. Also make all of pytest/nose finalizer mimic the same generic behaviour: if a setupX exists and fails, don’t run teardownX. This internally introduces a new method “node.addfinalizer()” helper which can only be called during the setup phase of a node.
simplify pytest.mark.parametrize() signature: allow to pass a CSV-separated string to specify argnames. For example: pytest.mark.parametrize("input,expected", [(1,2), (2,3)]) works as well as the previous: pytest.mark.parametrize(("input", "expected"), ...).
add support for setUpModule/tearDownModule detection, thanks Brian Okken.
integrate tab-completion on options through use of “argcomplete”. Thanks Anthon van der Neut for the PR.
change option names to be hyphen-separated long options but keep the old spelling backward compatible. py.test -h will only show the hyphenated version, for example “–collect-only” but “–collectonly” will remain valid as well (for backward-compat reasons). Many thanks to Anthon van der Neut for the implementation and to Hynek Schlawack for pushing us.
fix issue 308 - allow to mark/xfail/skip individual parameter sets when parametrizing. Thanks Brianna Laugher.
call new experimental pytest_load_initial_conftests hook to allow 3rd party plugins to do something before a conftest is loaded.

Bug fixes:

fix issue358 - capturing options are now parsed more properly by using a new parser.parse_known_args method.
pytest now uses argparse instead of optparse (thanks Anthon) which means that “argparse” is added as a dependency if installing into python2.6 environments or below.
fix issue333: fix a case of bad unittest/pytest hook interaction.
PR27: correctly handle nose.SkipTest during collection. Thanks Antonio Cuni, Ronny Pfannschmidt.
fix issue355: junitxml puts name=”pytest” attribute to testsuite tag.
fix issue336: autouse fixture in plugins should work again.
fix issue279: improve object comparisons on assertion failure for standard datatypes and recognise collections.abc. Thanks to Brianna Laugher and Mathieu Agopian.
fix issue317: assertion rewriter support for the is_package method
fix issue335: document py.code.ExceptionInfo() object returned from pytest.raises(), thanks Mathieu Agopian.
remove implicit distribute_setup support from setup.py.
fix issue305: ignore any problems when writing pyc files.
SO-17664702: call fixture finalizers even if the fixture function partially failed (finalizers would not always be called before)
fix issue320 - fix class scope for fixtures when mixed with module-level functions. Thanks Anatoly Bubenkoff.
you can specify “-q” or “-qq” to get different levels of “quieter” reporting (thanks Katarzyna Jachim)
fix issue300 - Fix order of conftest loading when starting py.test in a subdirectory.
fix issue323 - sorting of many module-scoped arg parametrizations
make sessionfinish hooks execute with the same cwd-context as at session start (helps fix plugin behaviour which write output files with relative path such as pytest-cov)
fix issue316 - properly reference collection hooks in docs
fix issue 306 - cleanup of -k/-m options to only match markers/test names/keywords respectively. Thanks Wouter van Ackooy.
improved doctest counting for doctests in python modules – files without any doctest items will not show up anymore and doctest examples are counted as separate test items. thanks Danilo Bellini.
fix issue245 by depending on the released py-1.4.14 which fixes py.io.dupfile to work with files with no mode. Thanks Jason R. Coombs.
fix junitxml generation when test output contains control characters, addressing issue267, thanks Jaap Broekhuizen
fix issue338: honor –tb style for setup/teardown errors as well. Thanks Maho.
fix issue307 - use yaml.safe_load in example, thanks Mark Eichin.
better parametrize error messages, thanks Brianna Laugher
pytest_terminal_summary(terminalreporter) hooks can now use “.section(title)” and “.line(msg)” methods to print extra information at the end of a test run.

2.3.5 (2013-04-30)¶

fix issue169: respect –tb=style with setup/teardown errors as well.
never consider a fixture function for test function collection
allow re-running of test items / helps to fix pytest-reruntests plugin and also help to keep less fixture/resource references alive
put captured stdout/stderr into junitxml output even for passing tests (thanks Adam Goucher)
Issue 265 - integrate nose setup/teardown with setupstate so it doesn’t try to teardown if it did not setup
issue 271 - don’t write junitxml on worker nodes
Issue 274 - don’t try to show full doctest example when doctest does not know the example location
issue 280 - disable assertion rewriting on buggy CPython 2.6.0
inject “getfixture()” helper to retrieve fixtures from doctests, thanks Andreas Zeidler
issue 259 - when assertion rewriting, be consistent with the default source encoding of ASCII on Python 2
issue 251 - report a skip instead of ignoring classes with init
issue250 unicode/str mixes in parametrization names and values now works
issue257, assertion-triggered compilation of source ending in a comment line doesn’t blow up in python2.5 (fixed through py>=1.4.13.dev6)
fix –genscript option to generate standalone scripts that also work with python3.3 (importer ordering)
issue171 - in assertion rewriting, show the repr of some global variables
fix option help for “-k”
move long description of distribution into README.rst
improve docstring for metafunc.parametrize()
fix bug where using capsys with pytest.set_trace() in a test function would break when looking at capsys.readouterr()
allow to specify prefixes starting with “_” when customizing python_functions test discovery. (thanks Graham Horler)
improve PYTEST_DEBUG tracing output by putting extra data on a new lines with additional indent
ensure OutcomeExceptions like skip/fail have initialized exception attributes
issue 260 - don’t use nose special setup on plain unittest cases
fix issue134 - print the collect errors that prevent running specified test items
fix issue266 - accept unicode in MarkEvaluator expressions

2.3.4 (2012-11-20)¶

yielded test functions will now have autouse-fixtures active but cannot accept fixtures as funcargs - it’s anyway recommended to rather use the post-2.0 parametrize features instead of yield, see: http://pytest.org/en/stable/example/how-to/parametrize.html
fix autouse-issue where autouse-fixtures would not be discovered if defined in an a/conftest.py file and tests in a/tests/test_some.py
fix issue226 - LIFO ordering for fixture teardowns
fix issue224 - invocations with >256 char arguments now work
fix issue91 - add/discuss package/directory level setups in example
allow to dynamically define markers via item.keywords[…]=assignment integrating with “-m” option
make “-k” accept an expressions the same as with “-m” so that one can write: -k “name1 or name2” etc. This is a slight incompatibility if you used special syntax like “TestClass.test_method” which you now need to write as -k “TestClass and test_method” to match a certain method in a certain test class.

2.3.3 (2012-11-06)¶

fix issue214 - parse modules that contain special objects like e. g. flask’s request object which blows up on getattr access if no request is active. thanks Thomas Waldmann.
fix issue213 - allow to parametrize with values like numpy arrays that do not support an __eq__ operator
fix issue215 - split test_python.org into multiple files
fix issue148 - @unittest.skip on classes is now recognized and avoids calling setUpClass/tearDownClass, thanks Pavel Repin
fix issue209 - reintroduce python2.4 support by depending on newer pylib which re-introduced statement-finding for pre-AST interpreters
nose support: only call setup if it’s a callable, thanks Andrew Taumoefolau
fix issue219 - add py2.4-3.3 classifiers to TROVE list
in tracebacks ,* arg values are now shown next to normal arguments (thanks Manuel Jacob)
fix issue217 - support mock.patch with pytest’s fixtures - note that you need either mock-1.0.1 or the python3.3 builtin unittest.mock.
fix issue127 - improve documentation for pytest_addoption() and add a config.getoption(name) helper function for consistency.

2.3.2 (2012-10-25)¶

fix issue208 and fix issue29 use new py version to avoid long pauses when printing tracebacks in long modules
fix issue205 - conftests in subdirs customizing pytest_pycollect_makemodule and pytest_pycollect_makeitem now work properly
fix teardown-ordering for parametrized setups
fix issue127 - better documentation for pytest_addoption and related objects.
fix unittest behaviour: TestCase.runtest only called if there are test methods defined
improve trial support: don’t collect its empty unittest.TestCase.runTest() method
“python setup.py test” now works with pytest itself
fix/improve internal/packaging related bits:
- exception message check of test_nose.py now passes on python33 as well
- issue206 - fix test_assertrewrite.py to work when a global PYTHONDONTWRITEBYTECODE=1 is present
- add tox.ini to pytest distribution so that ignore-dirs and others config bits are properly distributed for maintainers who run pytest-own tests

2.3.1 (2012-10-20)¶

fix issue202 - fix regression: using “self” from fixture functions now works as expected (it’s the same “self” instance that a test method which uses the fixture sees)
skip pexpect using tests (test_pdb.py mostly) on freebsd* systems due to pexpect not supporting it properly (hanging)
link to web pages from –markers output which provides help for pytest.mark.* usage.

2.3.0 (2012-10-19)¶

fix issue202 - better automatic names for parametrized test functions
fix issue139 - introduce @pytest.fixture which allows direct scoping and parametrization of funcarg factories.
fix issue198 - conftest fixtures were not found on windows32 in some circumstances with nested directory structures due to path manipulation issues
fix issue193 skip test functions with were parametrized with empty parameter sets
fix python3.3 compat, mostly reporting bits that previously depended on dict ordering
introduce re-ordering of tests by resource and parametrization setup which takes precedence to the usual file-ordering
fix issue185 monkeypatching time.time does not cause pytest to fail
fix issue172 duplicate call of pytest.fixture decoratored setup_module functions
fix junitxml=path construction so that if tests change the current working directory and the path is a relative path it is constructed correctly from the original current working dir.
fix “python setup.py test” example to cause a proper “errno” return
fix issue165 - fix broken doc links and mention stackoverflow for FAQ
catch unicode-issues when writing failure representations to terminal to prevent the whole session from crashing
fix xfail/skip confusion: a skip-mark or an imperative pytest.skip will now take precedence before xfail-markers because we can’t determine xfail/xpass status in case of a skip. see also: http://stackoverflow.com/questions/11105828/in-py-test-when-i-explicitly-skip-a-test-that-is-marked-as-xfail-how-can-i-get
always report installed 3rd party plugins in the header of a test run
fix issue160: a failing setup of an xfail-marked tests should be reported as xfail (not xpass)
fix issue128: show captured output when capsys/capfd are used
fix issue179: properly show the dependency chain of factories
pluginmanager.register(…) now raises ValueError if the plugin has been already registered or the name is taken
fix issue159: improve https://docs.pytest.org/en/6.0.1/faq.html especially with respect to the “magic” history, also mention pytest-django, trial and unittest integration.
make request.keywords and node.keywords writable. All descendant collection nodes will see keyword values. Keywords are dictionaries containing markers and other info.
fix issue 178: xml binary escapes are now wrapped in py.xml.raw
fix issue 176: correctly catch the builtin AssertionError even when we replaced AssertionError with a subclass on the python level
factory discovery no longer fails with magic global callables that provide no sane __code__ object (mock.call for example)
fix issue 182: testdir.inprocess_run now considers passed plugins
fix issue 188: ensure sys.exc_info is clear on python2
before calling into a test
fix issue 191: add unittest TestCase runTest method support
fix issue 156: monkeypatch correctly handles class level descriptors
reporting refinements:
- pytest_report_header now receives a “startdir” so that you can use startdir.bestrelpath(yourpath) to show nice relative path
- allow plugins to implement both pytest_report_header and pytest_sessionstart (sessionstart is invoked first).
- don’t show deselected reason line if there is none
- py.test -vv will show all of assert comparisons instead of truncating

2.2.4 (2012-05-22)¶

fix error message for rewritten assertions involving the % operator
fix issue 126: correctly match all invalid xml characters for junitxml binary escape
fix issue with unittest: now @unittest.expectedFailure markers should be processed correctly (you can also use @pytest.mark markers)
document integration with the extended distribute/setuptools test commands
fix issue 140: properly get the real functions of bound classmethods for setup/teardown_class
fix issue #141: switch from the deceased paste.pocoo.org to bpaste.net
fix issue #143: call unconfigure/sessionfinish always when configure/sessionstart where called
fix issue #144: better mangle test ids to junitxml classnames
upgrade distribute_setup.py to 0.6.27

2.2.3 (2012-02-05)¶

fix uploaded package to only include necessary files

2.2.2 (2012-02-05)¶

fix issue101: wrong args to unittest.TestCase test function now produce better output
fix issue102: report more useful errors and hints for when a test directory was renamed and some pyc/__pycache__ remain
fix issue106: allow parametrize to be applied multiple times e.g. from module, class and at function level.
fix issue107: actually perform session scope finalization
don’t check in parametrize if indirect parameters are funcarg names
add chdir method to monkeypatch funcarg
fix crash resulting from calling monkeypatch undo a second time
fix issue115: make –collectonly robust against early failure (missing files/directories)
“-qq –collectonly” now shows only files and the number of tests in them
“-q –collectonly” now shows test ids
allow adding of attributes to test reports such that it also works with distributed testing (no upgrade of pytest-xdist needed)

2.2.1 (2011-12-16)¶

fix issue99 (in pytest and py) internallerrors with resultlog now produce better output - fixed by normalizing pytest_internalerror input arguments.
fix issue97 / traceback issues (in pytest and py) improve traceback output in conjunction with jinja2 and cython which hack tracebacks
fix issue93 (in pytest and pytest-xdist) avoid “delayed teardowns”: the final test in a test node will now run its teardown directly instead of waiting for the end of the session. Thanks Dave Hunt for the good reporting and feedback. The pytest_runtest_protocol as well as the pytest_runtest_teardown hooks now have “nextitem” available which will be None indicating the end of the test run.
fix collection crash due to unknown-source collected items, thanks to Ralf Schmitt (fixed by depending on a more recent pylib)

2.2.0 (2011-11-18)¶

fix issue90: introduce eager tearing down of test items so that teardown function are called earlier.
add an all-powerful metafunc.parametrize function which allows to parametrize test function arguments in multiple steps and therefore from independent plugins and places.
add a @pytest.mark.parametrize helper which allows to easily call a test function with different argument values
Add examples to the “parametrize” example page, including a quick port of Test scenarios and the new parametrize function and decorator.
introduce registration for “pytest.mark.*” helpers via ini-files or through plugin hooks. Also introduce a “–strict” option which will treat unregistered markers as errors allowing to avoid typos and maintain a well described set of markers for your test suite. See examples at http://pytest.org/en/stable/how-to/mark.html and its links.
issue50: introduce “-m marker” option to select tests based on markers (this is a stricter and more predictable version of ‘-k’ in that “-m” only matches complete markers and has more obvious rules for and/or semantics.
new feature to help optimizing the speed of your tests: –durations=N option for displaying N slowest test calls and setup/teardown methods.
fix issue87: –pastebin now works with python3
fix issue89: –pdb with unexpected exceptions in doctest work more sensibly
fix and cleanup pytest’s own test suite to not leak FDs
fix issue83: link to generated funcarg list
fix issue74: pyarg module names are now checked against imp.find_module false positives
fix compatibility with twisted/trial-11.1.0 use cases
simplify Node.listchain
simplify junitxml output code by relying on py.xml
add support for skip properties on unittest classes and functions

2.1.3 (2011-10-18)¶

fix issue79: assertion rewriting failed on some comparisons in boolops
correctly handle zero length arguments (a la pytest ‘’)
fix issue67 / junitxml now contains correct test durations, thanks ronny
fix issue75 / skipping test failure on jython
fix issue77 / Allow assertrepr_compare hook to apply to a subset of tests

2.1.2 (2011-09-24)¶

fix assertion rewriting on files with windows newlines on some Python versions
refine test discovery by package/module name (–pyargs), thanks Florian Mayer
fix issue69 / assertion rewriting fixed on some boolean operations
fix issue68 / packages now work with assertion rewriting
fix issue66: use different assertion rewriting caches when the -O option is passed
don’t try assertion rewriting on Jython, use reinterp

2.1.1¶

fix issue64 / pytest.set_trace now works within pytest_generate_tests hooks
fix issue60 / fix error conditions involving the creation of __pycache__
fix issue63 / assertion rewriting on inserts involving strings containing ‘%’
fix assertion rewriting on calls with a ** arg
don’t cache rewritten modules if bytecode generation is disabled
fix assertion rewriting in read-only directories
fix issue59: provide system-out/err tags for junitxml output
fix issue61: assertion rewriting on boolean operations with 3 or more operands
you can now build a man page with “cd doc ; make man”

2.1.0 (2011-07-09)¶

fix issue53 call nosestyle setup functions with correct ordering
fix issue58 and issue59: new assertion code fixes
merge Benjamin’s assertionrewrite branch: now assertions for test modules on python 2.6 and above are done by rewriting the AST and saving the pyc file before the test module is imported. see doc/assert.txt for more info.
fix issue43: improve doctests with better traceback reporting on unexpected exceptions
fix issue47: timing output in junitxml for test cases is now correct
fix issue48: typo in MarkInfo repr leading to exception
fix issue49: avoid confusing error when initialization partially fails
fix issue44: env/username expansion for junitxml file path
show releaselevel information in test runs for pypy
reworked doc pages for better navigation and PDF generation
report KeyboardInterrupt even if interrupted during session startup
fix issue 35 - provide PDF doc version and download link from index page

2.0.3 (2011-05-11)¶

fix issue38: nicer tracebacks on calls to hooks, particularly early configure/sessionstart ones
fix missing skip reason/meta information in junitxml files, reported via http://lists.idyll.org/pipermail/testing-in-python/2011-March/003928.html
fix issue34: avoid collection failure with “test” prefixed classes deriving from object.
don’t require zlib (and other libs) for genscript plugin without –genscript actually being used.
speed up skips (by not doing a full traceback representation internally)
fix issue37: avoid invalid characters in junitxml’s output

2.0.2 (2011-03-09)¶

tackle issue32 - speed up test runs of very quick test functions by reducing the relative overhead
fix issue30 - extended xfail/skipif handling and improved reporting. If you have a syntax error in your skip/xfail expressions you now get nice error reports.

Also you can now access module globals from xfail/skipif expressions so that this for example works now:
```
import pytest
import mymodule
@pytest.mark.skipif("mymodule.__version__[0] == "1")
def test_function():
    pass
```
This will not run the test function if the module’s version string does not start with a “1”. Note that specifying a string instead of a boolean expressions allows py.test to report meaningful information when summarizing a test run as to what conditions lead to skipping (or xfail-ing) tests.
fix issue28 - setup_method and pytest_generate_tests work together The setup_method fixture method now gets called also for test function invocations generated from the pytest_generate_tests hook.
fix issue27 - collectonly and keyword-selection (-k) now work together Also, if you do “py.test –collectonly -q” you now get a flat list of test ids that you can use to paste to the py.test commandline in order to execute a particular test.
fix issue25 avoid reported problems with –pdb and python3.2/encodings output
fix issue23 - tmpdir argument now works on Python3.2 and WindowsXP Starting with Python3.2 os.symlink may be supported. By requiring a newer py lib version the py.path.local() implementation acknowledges this.
fixed typos in the docs (thanks Victor Garcia, Brianna Laugher) and particular thanks to Laura Creighton who also reviewed parts of the documentation.
fix slightly wrong output of verbose progress reporting for classes (thanks Amaury)
more precise (avoiding of) deprecation warnings for node.Class|Function accesses
avoid std unittest assertion helper code in tracebacks (thanks Ronny)

2.0.1 (2011-02-07)¶

refine and unify initial capturing so that it works nicely even if the logging module is used on an early-loaded conftest.py file or plugin.
allow to omit “()” in test ids to allow for uniform test ids as produced by Alfredo’s nice pytest.vim plugin.
fix issue12 - show plugin versions with “–version” and “–traceconfig” and also document how to add extra information to reporting test header
fix issue17 (import-* reporting issue on python3) by requiring py>1.4.0 (1.4.1 is going to include it)
fix issue10 (numpy arrays truth checking) by refining assertion interpretation in py lib
fix issue15: make nose compatibility tests compatible with python3 (now that nose-1.0 supports python3)
remove somewhat surprising “same-conftest” detection because it ignores conftest.py when they appear in several subdirs.
improve assertions (“not in”), thanks Floris Bruynooghe
improve behaviour/warnings when running on top of “python -OO” (assertions and docstrings are turned off, leading to potential false positives)
introduce a pytest_cmdline_processargs(args) hook to allow dynamic computation of command line arguments. This fixes a regression because py.test prior to 2.0 allowed to set command line options from conftest.py files which so far pytest-2.0 only allowed from ini-files now.
fix issue7: assert failures in doctest modules. unexpected failures in doctests will not generally show nicer, i.e. within the doctest failing context.
fix issue9: setup/teardown functions for an xfail-marked test will report as xfail if they fail but report as normally passing (not xpassing) if they succeed. This only is true for “direct” setup/teardown invocations because teardown_class/ teardown_module cannot closely relate to a single test.
fix issue14: no logging errors at process exit
refinements to “collecting” output on non-ttys
refine internal plugin registration and –traceconfig output
introduce a mechanism to prevent/unregister plugins from the command line, see http://pytest.org/en/stable/how-to/plugins.html#cmdunregister
activate resultlog plugin by default
fix regression wrt yielded tests which due to the collection-before-running semantics were not setup as with pytest 1.3.4. Note, however, that the recommended and much cleaner way to do test parameterization remains the “pytest_generate_tests” mechanism, see the docs.

2.0.0 (2010-11-25)¶

pytest-2.0 is now its own package and depends on pylib-2.0
new ability: python -m pytest / python -m pytest.main ability
new python invocation: pytest.main(args, plugins) to load some custom plugins early.
try harder to run unittest test suites in a more compatible manner by deferring setup/teardown semantics to the unittest package. also work harder to run twisted/trial and Django tests which should now basically work by default.
introduce a new way to set config options via ini-style files, by default setup.cfg and tox.ini files are searched. The old ways (certain environment variables, dynamic conftest.py reading is removed).
add a new “-q” option which decreases verbosity and prints a more nose/unittest-style “dot” output.
fix issue135 - marks now work with unittest test cases as well
fix issue126 - introduce py.test.set_trace() to trace execution via PDB during the running of tests even if capturing is ongoing.
fix issue123 - new “python -m py.test” invocation for py.test (requires Python 2.5 or above)
fix issue124 - make reporting more resilient against tests opening files on filedescriptor 1 (stdout).
fix issue109 - sibling conftest.py files will not be loaded. (and Directory collectors cannot be customized anymore from a Directory’s conftest.py - this needs to happen at least one level up).
introduce (customizable) assertion failure representations and enhance output on assertion failures for comparisons and other cases (Floris Bruynooghe)
nose-plugin: pass through type-signature failures in setup/teardown functions instead of not calling them (Ed Singleton)
remove py.test.collect.Directory (follows from a major refactoring and simplification of the collection process)
majorly reduce py.test core code, shift function/python testing to own plugin
fix issue88 (finding custom test nodes from command line arg)
refine ‘tmpdir’ creation, will now create basenames better associated with test names (thanks Ronny)
“xpass” (unexpected pass) tests don’t cause exitcode!=0
fix issue131 / issue60 - importing doctests in __init__ files used as namespace packages
fix issue93 stdout/stderr is captured while importing conftest.py
fix bug: unittest collected functions now also can have “pytestmark” applied at class/module level
add ability to use “class” level for cached_setup helper
fix strangeness: mark.* objects are now immutable, create new instances

1.3.4 (2010-09-14)¶

fix issue111: improve install documentation for windows
fix issue119: fix custom collectability of __init__.py as a module
fix issue116: –doctestmodules work with __init__.py files as well
fix issue115: unify internal exception passthrough/catching/GeneratorExit
fix issue118: new –tb=native for presenting cpython-standard exceptions

1.3.3 (2010-07-30)¶

fix issue113: assertion representation problem with triple-quoted strings (and possibly other cases)
make conftest loading detect that a conftest file with the same content was already loaded, avoids surprises in nested directory structures which can be produced e.g. by Hudson. It probably removes the need to use –confcutdir in most cases.
fix terminal coloring for win32 (thanks Michael Foord for reporting)
fix weirdness: make terminal width detection work on stdout instead of stdin (thanks Armin Ronacher for reporting)
remove trailing whitespace in all py/text distribution files

1.3.2 (2010-07-08)¶

New features

fix issue103: introduce py.test.raises as context manager, examples:

with py.test.raises(ZeroDivisionError):
    x = 0
    1 / x

with py.test.raises(RuntimeError) as excinfo:
    call_something()

# you may do extra checks on excinfo.value|type|traceback here

(thanks Ronny Pfannschmidt)

Funcarg factories can now dynamically apply a marker to a test invocation. This is for example useful if a factory provides parameters to a test which are expected-to-fail:
```
def pytest_funcarg__arg(request):
    request.applymarker(py.test.mark.xfail(reason="flaky config"))
    ...

def test_function(arg):
    ...
```
improved error reporting on collection and import errors. This makes use of a more general mechanism, namely that for custom test item/collect nodes node.repr_failure(excinfo) is now uniformly called so that you can override it to return a string error representation of your choice which is going to be reported as a (red) string.
introduce ‘–junitprefix=STR’ option to prepend a prefix to all reports in the junitxml file.

Bug fixes

make tests and the pytest_recwarn plugin in particular fully compatible to Python2.7 (if you use the recwarn funcarg warnings will be enabled so that you can properly check for their existence in a cross-python manner).
refine –pdb: ignore xfailed tests, unify its TB-reporting and don’t display failures again at the end.
fix assertion interpretation with the ** operator (thanks Benjamin Peterson)
fix issue105 assignment on the same line as a failing assertion (thanks Benjamin Peterson)
fix issue104 proper escaping for test names in junitxml plugin (thanks anonymous)
fix issue57 -f|–looponfail to work with xpassing tests (thanks Ronny)
fix issue92 collectonly reporter and –pastebin (thanks Benjamin Peterson)
fix py.code.compile(source) to generate unique filenames
fix assertion re-interp problems on PyPy, by deferring code compilation to the (overridable) Frame.eval class. (thanks Amaury Forgeot)
fix py.path.local.pyimport() to work with directories
streamline py.path.local.mkdtemp implementation and usage
don’t print empty lines when showing junitxml-filename
add optional boolean ignore_errors parameter to py.path.local.remove
fix terminal writing on win32/python2.4
py.process.cmdexec() now tries harder to return properly encoded unicode objects on all python versions
install plain py.test/py.which scripts also for Jython, this helps to get canonical script paths in virtualenv situations
make path.bestrelpath(path) return “.”, note that when calling X.bestrelpath the assumption is that X is a directory.
make initial conftest discovery ignore “–” prefixed arguments
fix resultlog plugin when used in a multicpu/multihost xdist situation (thanks Jakub Gustak)
perform distributed testing related reporting in the xdist-plugin rather than having dist-related code in the generic py.test distribution
fix homedir detection on Windows
ship distribute_setup.py version 0.6.13

1.3.1 (2010-05-25)¶

New features

issue91: introduce new py.test.xfail(reason) helper to imperatively mark a test as expected to fail. Can be used from within setup and test functions. This is useful especially for parametrized tests when certain configurations are expected-to-fail. In this case the declarative approach with the @py.test.mark.xfail cannot be used as it would mark all configurations as xfail.
issue102: introduce new –maxfail=NUM option to stop test runs after NUM failures. This is a generalization of the ‘-x’ or ‘–exitfirst’ option which is now equivalent to ‘–maxfail=1’. Both ‘-x’ and ‘–maxfail’ will now also print a line near the end indicating the Interruption.
issue89: allow py.test.mark decorators to be used on classes (class decorators were introduced with python2.6) and also allow to have multiple markers applied at class/module level by specifying a list.
improve and refine letter reporting in the progress bar: . pass f failed test s skipped tests (reminder: use for dependency/platform mismatch only) x xfailed test (test that was expected to fail) X xpassed test (test that was expected to fail but passed)

You can use any combination of ‘fsxX’ with the ‘-r’ extended reporting option. The xfail/xpass results will show up as skipped tests in the junitxml output - which also fixes issue99.
make py.test.cmdline.main() return the exitstatus instead of raising SystemExit and also allow it to be called multiple times. This of course requires that your application and tests are properly teared down and don’t have global state.

Bug Fixes

improved traceback presentation: - improved and unified reporting for “–tb=short” option - Errors during test module imports are much shorter, (using –tb=short style) - raises shows shorter more relevant tracebacks - –fulltrace now more systematically makes traces longer / inhibits cutting
improve support for raises and other dynamically compiled code by manipulating python’s linecache.cache instead of the previous rather hacky way of creating custom code objects. This makes it seamlessly work on Jython and PyPy where it previously didn’t.
fix issue96: make capturing more resilient against Control-C interruptions (involved somewhat substantial refactoring to the underlying capturing functionality to avoid race conditions).
fix chaining of conditional skipif/xfail decorators - so it works now as expected to use multiple @py.test.mark.skipif(condition) decorators, including specific reporting which of the conditions lead to skipping.
fix issue95: late-import zlib so that it’s not required for general py.test startup.
fix issue94: make reporting more robust against bogus source code (and internally be more careful when presenting unexpected byte sequences)

1.3.0 (2010-05-05)¶

deprecate –report option in favour of a new shorter and easier to remember -r option: it takes a string argument consisting of any combination of ‘xfsX’ characters. They relate to the single chars you see during the dotted progress printing and will print an extra line per test at the end of the test run. This extra line indicates the exact position or test ID that you directly paste to the py.test cmdline in order to re-run a particular test.
allow external plugins to register new hooks via the new pytest_addhooks(pluginmanager) hook. The new release of the pytest-xdist plugin for distributed and looponfailing testing requires this feature.
add a new pytest_ignore_collect(path, config) hook to allow projects and plugins to define exclusion behaviour for their directory structure - for example you may define in a conftest.py this method:
```
def pytest_ignore_collect(path):
    return path.check(link=1)
```
to prevent even a collection try of any tests in symlinked dirs.
new pytest_pycollect_makemodule(path, parent) hook for allowing customization of the Module collection object for a matching test module.
extend and refine xfail mechanism: @py.test.mark.xfail(run=False) do not run the decorated test @py.test.mark.xfail(reason="...") prints the reason string in xfail summaries specifying --runxfail on command line virtually ignores xfail markers
expose (previously internal) commonly useful methods: py.io.get_terminal_with() -> return terminal width py.io.ansi_print(…) -> print colored/bold text on linux/win32 py.io.saferepr(obj) -> return limited representation string
expose test outcome related exceptions as py.test.skip.Exception, py.test.raises.Exception etc., useful mostly for plugins doing special outcome interpretation/tweaking
(issue85) fix junitxml plugin to handle tests with non-ascii output
fix/refine python3 compatibility (thanks Benjamin Peterson)
fixes for making the jython/win32 combination work, note however: jython2.5.1/win32 does not provide a command line launcher, see https://bugs.jython.org/issue1491 . See pylib install documentation for how to work around.
fixes for handling of unicode exception values and unprintable objects
(issue87) fix unboundlocal error in assertionold code
(issue86) improve documentation for looponfailing
refine IO capturing: stdin-redirect pseudo-file now has a NOP close() method
ship distribute_setup.py version 0.6.10
added links to the new capturelog and coverage plugins

1.2.0 (2010-01-18)¶

refined usage and options for “py.cleanup”:

py.cleanup     # remove "*.pyc" and "*$py.class" (jython) files
py.cleanup -e .swp -e .cache # also remove files with these extensions
py.cleanup -s  # remove "build" and "dist" directory next to setup.py files
py.cleanup -d  # also remove empty directories
py.cleanup -a  # synonym for "-s -d -e 'pip-log.txt'"
py.cleanup -n  # dry run, only show what would be removed

add a new option “py.test –funcargs” which shows available funcargs and their help strings (docstrings on their respective factory function) for a given test path
display a short and concise traceback if a funcarg lookup fails
early-load “conftest.py” files in non-dot first-level sub directories. allows to conveniently keep and access test-related options in a test subdir and still add command line options.
fix issue67: new super-short traceback-printing option: “–tb=line” will print a single line for each failing (python) test indicating its filename, lineno and the failure value
fix issue78: always call python-level teardown functions even if the according setup failed. This includes refinements for calling setup_module/class functions which will now only be called once instead of the previous behaviour where they’d be called multiple times if they raise an exception (including a Skipped exception). Any exception will be re-corded and associated with all tests in the according module/class scope.
fix issue63: assume <40 columns to be a bogus terminal width, default to 80
fix pdb debugging to be in the correct frame on raises-related errors
update apipkg.py to fix an issue where recursive imports might unnecessarily break importing
fix plugin links

1.1.1 (2009-11-24)¶

moved dist/looponfailing from py.test core into a new separately released pytest-xdist plugin.
new junitxml plugin: –junitxml=path will generate a junit style xml file which is processable e.g. by the Hudson CI system.
new option: –genscript=path will generate a standalone py.test script which will not need any libraries installed. thanks to Ralf Schmitt.
new option: –ignore will prevent specified path from collection. Can be specified multiple times.
new option: –confcutdir=dir will make py.test only consider conftest files that are relative to the specified dir.
new funcarg: “pytestconfig” is the pytest config object for access to command line args and can now be easily used in a test.
install py.test and py.which with a -$VERSION suffix to disambiguate between Python3, python2.X, Jython and PyPy installed versions.
new “pytestconfig” funcarg allows access to test config object
new “pytest_report_header” hook can return additional lines to be displayed at the header of a test run.
(experimental) allow “py.test path::name1::name2::…” for pointing to a test within a test collection directly. This might eventually evolve as a full substitute to “-k” specifications.
streamlined plugin loading: order is now as documented in customize.html: setuptools, ENV, commandline, conftest. also setuptools entry point names are turned to canonical names (“pytest_*”)
automatically skip tests that need ‘capfd’ but have no os.dup
allow pytest_generate_tests to be defined in classes as well
deprecate usage of ‘disabled’ attribute in favour of pytestmark
deprecate definition of Directory, Module, Class and Function nodes in conftest.py files. Use pytest collect hooks instead.
collection/item node specific runtest/collect hooks are only called exactly on matching conftest.py files, i.e. ones which are exactly below the filesystem path of an item
change: the first pytest_collect_directory hook to return something will now prevent further hooks to be called.
change: figleaf plugin now requires –figleaf to run. Also change its long command line options to be a bit shorter (see py.test -h).
change: pytest doctest plugin is now enabled by default and has a new option –doctest-glob to set a pattern for file matches.
change: remove internal py._* helper vars, only keep py._pydir
robustify capturing to survive if custom pytest_runtest_setup code failed and prevented the capturing setup code from running.
make py.test.* helpers provided by default plugins visible early - works transparently both for pydoc and for interactive sessions which will regularly see e.g. py.test.mark and py.test.importorskip.
simplify internal plugin manager machinery
simplify internal collection tree by introducing a RootCollector node
fix assert reinterpreation that sees a call containing “keyword=…”
fix issue66: invoke pytest_sessionstart and pytest_sessionfinish hooks on worker nodes during dist-testing, report module/session teardown hooks correctly.
fix issue65: properly handle dist-testing if no execnet/py lib installed remotely.
skip some install-tests if no execnet is available
fix docs, fix internal bin/ script generation

1.1.0 (2009-11-05)¶

introduce automatic plugin registration via ‘pytest11’ entrypoints via setuptools’ pkg_resources.iter_entry_points
fix py.test dist-testing to work with execnet >= 1.0.0b4
re-introduce py.test.cmdline.main() for better backward compatibility
svn paths: fix a bug with path.check(versioned=True) for svn paths, allow ‘%’ in svn paths, make svnwc.update() default to interactive mode like in 1.0.x and add svnwc.update(interactive=False) to inhibit interaction.
refine distributed tarball to contain test and no pyc files
try harder to have deprecation warnings for py.compat.* accesses report a correct location

1.0.3¶

adjust and improve docs
remove py.rest tool and internal namespace - it was never really advertised and can still be used with the old release if needed. If there is interest it could be revived into its own tool i guess.
fix issue48 and issue59: raise an Error if the module from an imported test file does not seem to come from the filepath - avoids “same-name” confusion that has been reported repeatedly
merged Ronny’s nose-compatibility hacks: now nose-style setup_module() and setup() functions are supported
introduce generalized py.test.mark function marking
reshuffle / refine command line grouping
deprecate parser.addgroup in favour of getgroup which creates option group
add –report command line option that allows to control showing of skipped/xfailed sections
generalized skipping: a new way to mark python functions with skipif or xfail at function, class and modules level based on platform or sys-module attributes.
extend py.test.mark decorator to allow for positional args
introduce and test “py.cleanup -d” to remove empty directories
fix issue #59 - robustify unittest test collection
make bpython/help interaction work by adding an __all__ attribute to ApiModule, cleanup initpkg
use MIT license for pylib, add some contributors
remove py.execnet code and substitute all usages with ‘execnet’ proper
fix issue50 - cached_setup now caches more to expectations for test functions with multiple arguments.
merge Jarko’s fixes, issue #45 and #46
add the ability to specify a path for py.lookup to search in
fix a funcarg cached_setup bug probably only occurring in distributed testing and “module” scope with teardown.
many fixes and changes for making the code base python3 compatible, many thanks to Benjamin Peterson for helping with this.
consolidate builtins implementation to be compatible with >=2.3, add helpers to ease keeping 2 and 3k compatible code
deprecate py.compat.doctest|subprocess|textwrap|optparse
deprecate py.magic.autopath, remove py/magic directory
move pytest assertion handling to py/code and a pytest_assertion plugin, add “–no-assert” option, deprecate py.magic namespaces in favour of (less) py.code ones.
consolidate and cleanup py/code classes and files
cleanup py/misc, move tests to bin-for-dist
introduce delattr/delitem/delenv methods to py.test’s monkeypatch funcarg
consolidate py.log implementation, remove old approach.
introduce py.io.TextIO and py.io.BytesIO for distinguishing between text/unicode and byte-streams (uses underlying standard lib io.* if available)
make py.unittest_convert helper script available which converts “unittest.py” style files into the simpler assert/direct-test-classes py.test/nosetests style. The script was written by Laura Creighton.
simplified internal localpath implementation

1.0.2 (2009-08-27)¶

fixing packaging issues, triggered by fedora redhat packaging, also added doc, examples and contrib dirs to the tarball.
added a documentation link to the new django plugin.

1.0.1 (2009-08-19)¶

added a ‘pytest_nose’ plugin which handles nose.SkipTest, nose-style function/method/generator setup/teardown and tries to report functions correctly.
capturing of unicode writes or encoded strings to sys.stdout/err work better, also terminalwriting was adapted and somewhat unified between windows and linux.
improved documentation layout and content a lot
added a “–help-config” option to show conftest.py / ENV-var names for all longopt cmdline options, and some special conftest.py variables. renamed ‘conf_capture’ conftest setting to ‘option_capture’ accordingly.
fix issue #27: better reporting on non-collectable items given on commandline (e.g. pyc files)
fix issue #33: added –version flag (thanks Benjamin Peterson)
fix issue #32: adding support for “incomplete” paths to wcpath.status()
“Test” prefixed classes are not collected by default anymore if they have an __init__ method
monkeypatch setenv() now accepts a “prepend” parameter
improved reporting of collection error tracebacks
simplified multicall mechanism and plugin architecture, renamed some internal methods and argnames

1.0.0 (2009-08-04)¶

more terse reporting try to show filesystem path relatively to current dir
improve xfail output a bit

1.0.0b9 (2009-07-31)¶

cleanly handle and report final teardown of test setup
fix svn-1.6 compat issue with py.path.svnwc().versioned() (thanks Wouter Vanden Hove)
setup/teardown or collection problems now show as ERRORs or with big “E“‘s in the progress lines. they are reported and counted separately.
dist-testing: properly handle test items that get locally collected but cannot be collected on the remote side - often due to platform/dependency reasons
simplified py.test.mark API - see keyword plugin documentation
integrate better with logging: capturing now by default captures test functions and their immediate setup/teardown in a single stream
capsys and capfd funcargs now have a readouterr() and a close() method (underlyingly py.io.StdCapture/FD objects are used which grew a readouterr() method as well to return snapshots of captured out/err)
make assert-reinterpretation work better with comparisons not returning bools (reported with numpy from thanks maciej fijalkowski)
reworked per-test output capturing into the pytest_iocapture.py plugin and thus removed capturing code from config object
item.repr_failure(excinfo) instead of item.repr_failure(excinfo, outerr)

1.0.0b8 (2009-07-22)¶

pytest_unittest-plugin is now enabled by default
introduced pytest_keyboardinterrupt hook and refined pytest_sessionfinish hooked, added tests.
workaround a buggy logging module interaction (“closing already closed files”). Thanks to Sridhar Ratnakumar for triggering.
if plugins use “py.test.importorskip” for importing a dependency only a warning will be issued instead of exiting the testing process.
many improvements to docs: - refined funcargs doc , use the term “factory” instead of “provider” - added a new talk/tutorial doc page - better download page - better plugin docstrings - added new plugins page and automatic doc generation script
fixed teardown problem related to partially failing funcarg setups (thanks MrTopf for reporting), “pytest_runtest_teardown” is now always invoked even if the “pytest_runtest_setup” failed.
tweaked doctest output for docstrings in py modules, thanks Radomir.

1.0.0b7¶

renamed py.test.xfail back to py.test.mark.xfail to avoid two ways to decorate for xfail
re-added py.test.mark decorator for setting keywords on functions (it was actually documented so removing it was not nice)
remove scope-argument from request.addfinalizer() because request.cached_setup has the scope arg. TOOWTDI.
perform setup finalization before reporting failures
apply modified patches from Andreas Kloeckner to allow test functions to have no func_code (#22) and to make “-k” and function keywords work (#20)
apply patch from Daniel Peolzleithner (issue #23)
resolve issue #18, multiprocessing.Manager() and redirection clash
make __name__ == “__channelexec__” for remote_exec code

1.0.0b3 (2009-06-19)¶

plugin classes are removed: one now defines hooks directly in conftest.py or global pytest_*.py files.
added new pytest_namespace(config) hook that allows to inject helpers directly to the py.test.* namespace.
documented and refined many hooks
added new style of generative tests via pytest_generate_tests hook that integrates well with function arguments.

1.0.0b1¶

introduced new “funcarg” setup method, see doc/test/funcarg.txt
introduced plugin architecture and many new py.test plugins, see doc/test/plugins.txt
teardown_method is now guaranteed to get called after a test method has run.
new method: py.test.importorskip(mod,minversion) will either import or call py.test.skip()
completely revised internal py.test architecture
new py.process.ForkedFunc object allowing to fork execution of a function to a sub process and getting a result back.

XXX lots of things missing here XXX

0.9.2¶

refined installation and metadata, created new setup.py, now based on setuptools/ez_setup (thanks to Ralf Schmitt for his support).
improved the way of making py.* scripts available in windows environments, they are now added to the Scripts directory as “.cmd” files.
py.path.svnwc.status() now is more complete and uses xml output from the ‘svn’ command if available (Guido Wesdorp)
fix for py.path.svn* to work with svn 1.5 (Chris Lamb)
fix path.relto(otherpath) method on windows to use normcase for checking if a path is relative.
py.test’s traceback is better parseable from editors (follows the filenames:LINENO: MSG convention) (thanks to Osmo Salomaa)
fix to javascript-generation, “py.test –runbrowser” should work more reliably now
removed previously accidentally added py.test.broken and py.test.notimplemented helpers.
there now is a py.__version__ attribute

0.9.1¶

This is a fairly complete list of v0.9.1, which can serve as a reference for developers.

allowing + signs in py.path.svn urls [39106]
fixed support for Failed exceptions without excinfo in py.test [39340]
added support for killing processes for Windows (as well as platforms that support os.kill) in py.misc.killproc [39655]
added setup/teardown for generative tests to py.test [40702]
added detection of FAILED TO LOAD MODULE to py.test [40703, 40738, 40739]
fixed problem with calling .remove() on wcpaths of non-versioned files in py.path [44248]
fixed some import and inheritance issues in py.test [41480, 44648, 44655]
fail to run greenlet tests when pypy is available, but without stackless [45294]
small fixes in rsession tests [45295]
fixed issue with 2.5 type representations in py.test [45483, 45484]
made that internal reporting issues displaying is done atomically in py.test [45518]
made that non-existing files are ignored by the py.lookup script [45519]
improved exception name creation in py.test [45535]
made that less threads are used in execnet [merge in 45539]
removed lock required for atomic reporting issue displaying in py.test [45545]
removed globals from execnet [45541, 45547]
refactored cleanup mechanics, made that setDaemon is set to 1 to make atexit get called in 2.5 (py.execnet) [45548]
fixed bug in joining threads in py.execnet’s servemain [45549]
refactored py.test.rsession tests to not rely on exact output format anymore [45646]
using repr() on test outcome [45647]
added ‘Reason’ classes for py.test.skip() [45648, 45649]
killed some unnecessary sanity check in py.test.collect [45655]
avoid using os.tmpfile() in py.io.fdcapture because on Windows it’s only usable by Administrators [45901]
added support for locking and non-recursive commits to py.path.svnwc [45994]
locking files in py.execnet to prevent CPython from segfaulting [46010]
added export() method to py.path.svnurl
fixed -d -x in py.test [47277]
fixed argument concatenation problem in py.path.svnwc [49423]
restore py.test behaviour that it exits with code 1 when there are failures [49974]
don’t fail on html files that don’t have an accompanying .txt file [50606]
fixed ‘utestconvert.py < input’ [50645]
small fix for code indentation in py.code.source [50755]
fix _docgen.py documentation building [51285]
improved checks for source representation of code blocks in py.test [51292]
added support for passing authentication to py.path.svn* objects [52000, 52001]
removed sorted() call for py.apigen tests in favour of [].sort() to support Python 2.3 [52481]

更改日志¶

To be included in v0.1 (if present)¶

pytest 0.1 [UNRELEASED DRAFT] (2024-10-30)¶

New features¶

Improvements in existing functionality¶

Bug fixes¶

Improved documentation¶

Contributor-facing changes¶

Miscellaneous internal changes¶

Released versions¶

pytest 8.3.3 (2024-09-09)¶

bug修复¶

改进的文档¶

Miscellaneous internal changes¶

pytest 8.3.2 (2024-07-24)¶

Bug fixes¶

pytest 8.3.1 (2024-07-20)¶

pytest 8.3.0 (2024-07-20)¶

New features¶

Improvements in existing functionality¶

Bug fixes¶

Improved documentation¶

Contributor-facing changes¶

pytest 8.2.2 (2024-06-04)¶

Bug Fixes¶

Improved Documentation¶

pytest 8.2.1 (2024-05-19)¶

Improvements¶

Bug Fixes¶

Trivial/Internal Changes¶

pytest 8.2.0 (2024-04-27)¶

Breaking Changes¶

Deprecations¶

Features¶

Improvements¶

Bug Fixes¶

Trivial/Internal Changes¶

pytest 8.1.2 (2024-04-26)¶

Bug Fixes¶

pytest 8.1.1 (2024-03-08)¶

Features¶

Improvements¶

Bug Fixes¶

Improved Documentation¶

Trivial/Internal Changes¶

pytest 8.1.0 (YANKED)¶

pytest 8.0.2 (2024-02-24)¶

Bug Fixes¶

pytest 8.0.1 (2024-02-16)¶

Bug Fixes¶

pytest 8.0.0 (2024-01-27)¶

Bug Fixes¶

pytest 8.0.0rc2 (2024-01-17)¶

Improvements¶

Bug Fixes¶

pytest 8.0.0rc1 (2023-12-30)¶

Breaking Changes¶

Old Deprecations Are Now Errors¶

Version Compatibility¶

Collection Changes¶

Other breaking changes¶

Deprecations¶

Features and Improvements¶

Improved Diffs¶

Separate Control For Assertion Verbosity¶

Additional Support For Exception Groups and __notes__¶

Custom Directory collectors¶

“New-style” Hook Wrappers¶

Other Improvements¶

Bug Fixes¶

Improved Documentation¶

Trivial/Internal Changes¶

pytest 7.4.4 (2023-12-31)¶

Bug Fixes¶

Improved Documentation¶

pytest 7.4.3 (2023-10-24)¶

Bug Fixes¶

pytest 7.4.2 (2023-09-07)¶

Bug Fixes¶

Improved Documentation¶

Additional Support For Exception Groups and `notes`¶