1481 lines
34 KiB
ReStructuredText
1481 lines
34 KiB
ReStructuredText
Reference
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=========
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This page contains the full reference to pytest's API.
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.. contents::
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:depth: 3
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:local:
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Functions
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---------
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pytest.approx
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~~~~~~~~~~~~~
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.. autofunction:: _pytest.python_api.approx
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pytest.fail
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~~~~~~~~~~~
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**Tutorial**: :ref:`skipping`
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.. autofunction:: _pytest.outcomes.fail
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pytest.skip
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~~~~~~~~~~~
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.. autofunction:: _pytest.outcomes.skip(msg, [allow_module_level=False])
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pytest.importorskip
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~~~~~~~~~~~~~~~~~~~
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.. autofunction:: _pytest.outcomes.importorskip
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pytest.xfail
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~~~~~~~~~~~~
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.. autofunction:: _pytest.outcomes.xfail
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pytest.exit
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~~~~~~~~~~~
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.. autofunction:: _pytest.outcomes.exit
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pytest.main
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~~~~~~~~~~~
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.. autofunction:: _pytest.config.main
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pytest.param
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~~~~~~~~~~~~
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.. autofunction:: pytest.param(*values, [id], [marks])
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pytest.raises
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~~~~~~~~~~~~~
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**Tutorial**: :ref:`assertraises`.
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.. autofunction:: pytest.raises(expected_exception: Exception, [match], [message])
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:with: excinfo
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pytest.deprecated_call
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~~~~~~~~~~~~~~~~~~~~~~
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**Tutorial**: :ref:`ensuring_function_triggers`.
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.. autofunction:: pytest.deprecated_call()
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:with:
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pytest.register_assert_rewrite
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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**Tutorial**: :ref:`assertion-rewriting`.
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.. autofunction:: pytest.register_assert_rewrite
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pytest.warns
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~~~~~~~~~~~~
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**Tutorial**: :ref:`assertwarnings`
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.. autofunction:: pytest.warns(expected_warning: Exception, [match])
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:with:
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pytest.freeze_includes
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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**Tutorial**: :ref:`freezing-pytest`.
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.. autofunction:: pytest.freeze_includes
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.. _`marks ref`:
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Marks
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-----
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Marks can be used apply meta data to *test functions* (but not fixtures), which can then be accessed by
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fixtures or plugins.
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.. _`pytest.mark.filterwarnings ref`:
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pytest.mark.filterwarnings
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~~~~~~~~~~~~~~~~~~~~~~~~~~
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**Tutorial**: :ref:`filterwarnings`.
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Add warning filters to marked test items.
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.. py:function:: pytest.mark.filterwarnings(filter)
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:keyword str filter:
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A *warning specification string*, which is composed of contents of the tuple ``(action, message, category, module, lineno)``
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as specified in `The Warnings filter <https://docs.python.org/3/library/warnings.html#warning-filter>`_ section of
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the Python documentation, separated by ``":"``. Optional fields can be omitted.
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Module names passed for filtering are not regex-escaped.
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For example:
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.. code-block:: python
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@pytest.mark.warnings("ignore:.*usage will be deprecated.*:DeprecationWarning")
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def test_foo():
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...
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.. _`pytest.mark.parametrize ref`:
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pytest.mark.parametrize
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~~~~~~~~~~~~~~~~~~~~~~~
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**Tutorial**: :doc:`parametrize`.
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.. automethod:: _pytest.python.Metafunc.parametrize
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.. _`pytest.mark.skip ref`:
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pytest.mark.skip
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~~~~~~~~~~~~~~~~
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**Tutorial**: :ref:`skip`.
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Unconditionally skip a test function.
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.. py:function:: pytest.mark.skip(*, reason=None)
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:keyword str reason: Reason why the test function is being skipped.
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.. _`pytest.mark.skipif ref`:
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pytest.mark.skipif
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~~~~~~~~~~~~~~~~~~
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**Tutorial**: :ref:`skipif`.
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Skip a test function if a condition is ``True``.
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.. py:function:: pytest.mark.skipif(condition, *, reason=None)
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:type condition: bool or str
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:param condition: ``True/False`` if the condition should be skipped or a :ref:`condition string <string conditions>`.
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:keyword str reason: Reason why the test function is being skipped.
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.. _`pytest.mark.usefixtures ref`:
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pytest.mark.usefixtures
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~~~~~~~~~~~~~~~~~~~~~~~
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**Tutorial**: :ref:`usefixtures`.
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Mark a test function as using the given fixture names.
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.. warning::
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This mark has no effect when applied
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to a **fixture** function.
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.. py:function:: pytest.mark.usefixtures(*names)
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:param args: the names of the fixture to use, as strings
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.. _`pytest.mark.xfail ref`:
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pytest.mark.xfail
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~~~~~~~~~~~~~~~~~~
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**Tutorial**: :ref:`xfail`.
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Marks a test function as *expected to fail*.
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.. py:function:: pytest.mark.xfail(condition=None, *, reason=None, raises=None, run=True, strict=False)
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:type condition: bool or str
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:param condition:
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Condition for marking the test function as xfail (``True/False`` or a
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:ref:`condition string <string conditions>`).
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:keyword str reason: Reason why the test function is marked as xfail.
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:keyword Exception raises: Exception subclass expected to be raised by the test function; other exceptions will fail the test.
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:keyword bool run:
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If the test function should actually be executed. If ``False``, the function will always xfail and will
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not be executed (useful if a function is segfaulting).
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:keyword bool strict:
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* If ``False`` (the default) the function will be shown in the terminal output as ``xfailed`` if it fails
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and as ``xpass`` if it passes. In both cases this will not cause the test suite to fail as a whole. This
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is particularly useful to mark *flaky* tests (tests that fail at random) to be tackled later.
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* If ``True``, the function will be shown in the terminal output as ``xfailed`` if it fails, but if it
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unexpectedly passes then it will **fail** the test suite. This is particularly useful to mark functions
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that are always failing and there should be a clear indication if they unexpectedly start to pass (for example
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a new release of a library fixes a known bug).
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custom marks
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~~~~~~~~~~~~
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Marks are created dynamically using the factory object ``pytest.mark`` and applied as a decorator.
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For example:
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.. code-block:: python
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@pytest.mark.timeout(10, "slow", method="thread")
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def test_function():
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...
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Will create and attach a :class:`Mark <_pytest.mark.structures.Mark>` object to the collected
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:class:`Item <_pytest.nodes.Item>`, which can then be accessed by fixtures or hooks with
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:meth:`Node.iter_markers <_pytest.nodes.Node.iter_markers>`. The ``mark`` object will have the following attributes:
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.. code-block:: python
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mark.args == (10, "slow")
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mark.kwargs == {"method": "thread"}
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Fixtures
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--------
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**Tutorial**: :ref:`fixture`.
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Fixtures are requested by test functions or other fixtures by declaring them as argument names.
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Example of a test requiring a fixture:
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.. code-block:: python
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def test_output(capsys):
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print("hello")
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out, err = capsys.readouterr()
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assert out == "hello\n"
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Example of a fixture requiring another fixture:
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.. code-block:: python
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@pytest.fixture
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def db_session(tmpdir):
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fn = tmpdir / "db.file"
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return connect(str(fn))
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For more details, consult the full :ref:`fixtures docs <fixture>`.
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@pytest.fixture
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~~~~~~~~~~~~~~~
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.. autofunction:: pytest.fixture
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:decorator:
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.. _`cache-api`:
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config.cache
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~~~~~~~~~~~~
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**Tutorial**: :ref:`cache`.
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The ``config.cache`` object allows other plugins and fixtures
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to store and retrieve values across test runs. To access it from fixtures
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request ``pytestconfig`` into your fixture and get it with ``pytestconfig.cache``.
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Under the hood, the cache plugin uses the simple
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``dumps``/``loads`` API of the :py:mod:`json` stdlib module.
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.. currentmodule:: _pytest.cacheprovider
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.. automethod:: Cache.get
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.. automethod:: Cache.set
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.. automethod:: Cache.makedir
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capsys
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~~~~~~
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**Tutorial**: :doc:`capture`.
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.. currentmodule:: _pytest.capture
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.. autofunction:: capsys()
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:no-auto-options:
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Returns an instance of :py:class:`CaptureFixture`.
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Example:
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.. code-block:: python
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def test_output(capsys):
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print("hello")
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captured = capsys.readouterr()
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assert captured.out == "hello\n"
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.. autoclass:: CaptureFixture()
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:members:
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capsysbinary
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~~~~~~~~~~~~
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**Tutorial**: :doc:`capture`.
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.. autofunction:: capsysbinary()
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:no-auto-options:
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Returns an instance of :py:class:`CaptureFixture`.
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Example:
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.. code-block:: python
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def test_output(capsysbinary):
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print("hello")
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captured = capsysbinary.readouterr()
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assert captured.out == b"hello\n"
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capfd
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~~~~~~
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**Tutorial**: :doc:`capture`.
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.. autofunction:: capfd()
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:no-auto-options:
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Returns an instance of :py:class:`CaptureFixture`.
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Example:
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.. code-block:: python
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def test_system_echo(capfd):
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os.system('echo "hello"')
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captured = capsys.readouterr()
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assert captured.out == "hello\n"
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capfdbinary
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~~~~~~~~~~~~
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**Tutorial**: :doc:`capture`.
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.. autofunction:: capfdbinary()
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:no-auto-options:
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Returns an instance of :py:class:`CaptureFixture`.
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Example:
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.. code-block:: python
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def test_system_echo(capfdbinary):
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os.system('echo "hello"')
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captured = capfdbinary.readouterr()
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assert captured.out == b"hello\n"
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doctest_namespace
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~~~~~~~~~~~~~~~~~
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**Tutorial**: :doc:`doctest`.
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.. autofunction:: _pytest.doctest.doctest_namespace()
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Usually this fixture is used in conjunction with another ``autouse`` fixture:
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.. code-block:: python
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@pytest.fixture(autouse=True)
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def add_np(doctest_namespace):
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doctest_namespace["np"] = numpy
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For more details: :ref:`doctest_namespace`.
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request
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~~~~~~~
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**Tutorial**: :ref:`request example`.
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The ``request`` fixture is a special fixture providing information of the requesting test function.
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.. autoclass:: _pytest.fixtures.FixtureRequest()
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:members:
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pytestconfig
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~~~~~~~~~~~~
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.. autofunction:: _pytest.fixtures.pytestconfig()
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record_property
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~~~~~~~~~~~~~~~~~~~
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**Tutorial**: :ref:`record_property example`.
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.. autofunction:: _pytest.junitxml.record_property()
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record_testsuite_property
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~~~~~~~~~~~~~~~~~~~~~~~~~
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**Tutorial**: :ref:`record_testsuite_property example`.
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.. autofunction:: _pytest.junitxml.record_testsuite_property()
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caplog
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~~~~~~
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**Tutorial**: :doc:`logging`.
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.. autofunction:: _pytest.logging.caplog()
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:no-auto-options:
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This returns a :class:`_pytest.logging.LogCaptureFixture` instance.
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.. autoclass:: _pytest.logging.LogCaptureFixture
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:members:
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monkeypatch
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~~~~~~~~~~~
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.. currentmodule:: _pytest.monkeypatch
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**Tutorial**: :doc:`monkeypatch`.
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.. autofunction:: _pytest.monkeypatch.monkeypatch()
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:no-auto-options:
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This returns a :class:`MonkeyPatch` instance.
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.. autoclass:: _pytest.monkeypatch.MonkeyPatch
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:members:
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testdir
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~~~~~~~
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.. currentmodule:: _pytest.pytester
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This fixture provides a :class:`Testdir` instance useful for black-box testing of test files, making it ideal to
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test plugins.
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To use it, include in your top-most ``conftest.py`` file::
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pytest_plugins = 'pytester'
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.. autoclass:: Testdir()
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:members:
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.. autoclass:: RunResult()
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:members:
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.. autoclass:: LineMatcher()
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:members:
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recwarn
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~~~~~~~
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**Tutorial**: :ref:`assertwarnings`
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.. currentmodule:: _pytest.recwarn
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.. autofunction:: recwarn()
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:no-auto-options:
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.. autoclass:: _pytest.recwarn.WarningsRecorder()
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:members:
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||
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Each recorded warning is an instance of :class:`warnings.WarningMessage`.
|
||
|
||
.. note::
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:class:`RecordedWarning` was changed from a plain class to a namedtuple in pytest 3.1
|
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|
||
.. note::
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``DeprecationWarning`` and ``PendingDeprecationWarning`` are treated
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differently; see :ref:`ensuring_function_triggers`.
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tmp_path
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~~~~~~~~
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**Tutorial**: :doc:`tmpdir`
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.. currentmodule:: _pytest.tmpdir
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.. autofunction:: tmp_path()
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:no-auto-options:
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||
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||
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tmp_path_factory
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~~~~~~~~~~~~~~~~
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||
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||
**Tutorial**: :ref:`tmp_path_factory example`
|
||
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||
.. _`tmp_path_factory factory api`:
|
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||
``tmp_path_factory`` instances have the following methods:
|
||
|
||
.. currentmodule:: _pytest.tmpdir
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||
|
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.. automethod:: TempPathFactory.mktemp
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.. automethod:: TempPathFactory.getbasetemp
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||
|
||
|
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tmpdir
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~~~~~~
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||
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||
**Tutorial**: :doc:`tmpdir`
|
||
|
||
.. currentmodule:: _pytest.tmpdir
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||
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||
.. autofunction:: tmpdir()
|
||
:no-auto-options:
|
||
|
||
|
||
tmpdir_factory
|
||
~~~~~~~~~~~~~~
|
||
|
||
**Tutorial**: :ref:`tmpdir factory example`
|
||
|
||
.. _`tmpdir factory api`:
|
||
|
||
``tmpdir_factory`` instances have the following methods:
|
||
|
||
.. currentmodule:: _pytest.tmpdir
|
||
|
||
.. automethod:: TempdirFactory.mktemp
|
||
.. automethod:: TempdirFactory.getbasetemp
|
||
|
||
|
||
.. _`hook-reference`:
|
||
|
||
Hooks
|
||
-----
|
||
|
||
**Tutorial**: :doc:`writing_plugins`.
|
||
|
||
.. currentmodule:: _pytest.hookspec
|
||
|
||
Reference to all hooks which can be implemented by :ref:`conftest.py files <localplugin>` and :ref:`plugins <plugins>`.
|
||
|
||
Bootstrapping hooks
|
||
~~~~~~~~~~~~~~~~~~~
|
||
|
||
Bootstrapping hooks called for plugins registered early enough (internal and setuptools plugins).
|
||
|
||
.. autofunction:: pytest_load_initial_conftests
|
||
.. autofunction:: pytest_cmdline_preparse
|
||
.. autofunction:: pytest_cmdline_parse
|
||
.. autofunction:: pytest_cmdline_main
|
||
|
||
.. _`initialization-hooks`:
|
||
|
||
Initialization hooks
|
||
~~~~~~~~~~~~~~~~~~~~
|
||
|
||
Initialization hooks called for plugins and ``conftest.py`` files.
|
||
|
||
.. autofunction:: pytest_addoption
|
||
.. autofunction:: pytest_addhooks
|
||
.. autofunction:: pytest_configure
|
||
.. autofunction:: pytest_unconfigure
|
||
.. autofunction:: pytest_sessionstart
|
||
.. autofunction:: pytest_sessionfinish
|
||
|
||
.. autofunction:: pytest_plugin_registered
|
||
|
||
Test running hooks
|
||
~~~~~~~~~~~~~~~~~~
|
||
|
||
All runtest related hooks receive a :py:class:`pytest.Item <_pytest.main.Item>` object.
|
||
|
||
.. autofunction:: pytest_runtestloop
|
||
.. autofunction:: pytest_runtest_protocol
|
||
.. autofunction:: pytest_runtest_logstart
|
||
.. autofunction:: pytest_runtest_logfinish
|
||
.. autofunction:: pytest_runtest_setup
|
||
.. autofunction:: pytest_runtest_call
|
||
.. autofunction:: pytest_runtest_teardown
|
||
.. autofunction:: pytest_runtest_makereport
|
||
|
||
For deeper understanding you may look at the default implementation of
|
||
these hooks in :py:mod:`_pytest.runner` and maybe also
|
||
in :py:mod:`_pytest.pdb` which interacts with :py:mod:`_pytest.capture`
|
||
and its input/output capturing in order to immediately drop
|
||
into interactive debugging when a test failure occurs.
|
||
|
||
The :py:mod:`_pytest.terminal` reported specifically uses
|
||
the reporting hook to print information about a test run.
|
||
|
||
.. autofunction:: pytest_pyfunc_call
|
||
|
||
Collection hooks
|
||
~~~~~~~~~~~~~~~~
|
||
|
||
``pytest`` calls the following hooks for collecting files and directories:
|
||
|
||
.. autofunction:: pytest_collection
|
||
.. autofunction:: pytest_ignore_collect
|
||
.. autofunction:: pytest_collect_directory
|
||
.. autofunction:: pytest_collect_file
|
||
.. autofunction:: pytest_pycollect_makemodule
|
||
|
||
For influencing the collection of objects in Python modules
|
||
you can use the following hook:
|
||
|
||
.. autofunction:: pytest_pycollect_makeitem
|
||
.. autofunction:: pytest_generate_tests
|
||
.. autofunction:: pytest_make_parametrize_id
|
||
|
||
After collection is complete, you can modify the order of
|
||
items, delete or otherwise amend the test items:
|
||
|
||
.. autofunction:: pytest_collection_modifyitems
|
||
|
||
.. autofunction:: pytest_collection_finish
|
||
|
||
Reporting hooks
|
||
~~~~~~~~~~~~~~~
|
||
|
||
Session related reporting hooks:
|
||
|
||
.. autofunction:: pytest_collectstart
|
||
.. autofunction:: pytest_make_collect_report
|
||
.. autofunction:: pytest_itemcollected
|
||
.. autofunction:: pytest_collectreport
|
||
.. autofunction:: pytest_deselected
|
||
.. autofunction:: pytest_report_header
|
||
.. autofunction:: pytest_report_collectionfinish
|
||
.. autofunction:: pytest_report_teststatus
|
||
.. autofunction:: pytest_terminal_summary
|
||
.. autofunction:: pytest_fixture_setup
|
||
.. autofunction:: pytest_fixture_post_finalizer
|
||
.. autofunction:: pytest_warning_captured
|
||
|
||
And here is the central hook for reporting about
|
||
test execution:
|
||
|
||
.. autofunction:: pytest_runtest_logreport
|
||
|
||
You can also use this hook to customize assertion representation for some
|
||
types:
|
||
|
||
.. autofunction:: pytest_assertrepr_compare
|
||
|
||
|
||
Debugging/Interaction hooks
|
||
~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||
|
||
There are few hooks which can be used for special
|
||
reporting or interaction with exceptions:
|
||
|
||
.. autofunction:: pytest_internalerror
|
||
.. autofunction:: pytest_keyboard_interrupt
|
||
.. autofunction:: pytest_exception_interact
|
||
.. autofunction:: pytest_enter_pdb
|
||
|
||
|
||
Objects
|
||
-------
|
||
|
||
Full reference to objects accessible from :ref:`fixtures <fixture>` or :ref:`hooks <hook-reference>`.
|
||
|
||
|
||
CallInfo
|
||
~~~~~~~~
|
||
|
||
.. autoclass:: _pytest.runner.CallInfo()
|
||
:members:
|
||
|
||
|
||
Class
|
||
~~~~~
|
||
|
||
.. autoclass:: _pytest.python.Class()
|
||
:members:
|
||
:show-inheritance:
|
||
|
||
Collector
|
||
~~~~~~~~~
|
||
|
||
.. autoclass:: _pytest.nodes.Collector()
|
||
:members:
|
||
:show-inheritance:
|
||
|
||
Config
|
||
~~~~~~
|
||
|
||
.. autoclass:: _pytest.config.Config()
|
||
:members:
|
||
|
||
ExceptionInfo
|
||
~~~~~~~~~~~~~
|
||
|
||
.. autoclass:: _pytest._code.ExceptionInfo
|
||
:members:
|
||
|
||
FixtureDef
|
||
~~~~~~~~~~
|
||
|
||
.. autoclass:: _pytest.fixtures.FixtureDef()
|
||
:members:
|
||
:show-inheritance:
|
||
|
||
FSCollector
|
||
~~~~~~~~~~~
|
||
|
||
.. autoclass:: _pytest.nodes.FSCollector()
|
||
:members:
|
||
:show-inheritance:
|
||
|
||
Function
|
||
~~~~~~~~
|
||
|
||
.. autoclass:: _pytest.python.Function()
|
||
:members:
|
||
:show-inheritance:
|
||
|
||
Item
|
||
~~~~
|
||
|
||
.. autoclass:: _pytest.nodes.Item()
|
||
:members:
|
||
:show-inheritance:
|
||
|
||
MarkDecorator
|
||
~~~~~~~~~~~~~
|
||
|
||
.. autoclass:: _pytest.mark.MarkDecorator
|
||
:members:
|
||
|
||
|
||
MarkGenerator
|
||
~~~~~~~~~~~~~
|
||
|
||
.. autoclass:: _pytest.mark.MarkGenerator
|
||
:members:
|
||
|
||
|
||
Mark
|
||
~~~~
|
||
|
||
.. autoclass:: _pytest.mark.structures.Mark
|
||
:members:
|
||
|
||
|
||
Metafunc
|
||
~~~~~~~~
|
||
|
||
.. autoclass:: _pytest.python.Metafunc
|
||
:members:
|
||
|
||
Module
|
||
~~~~~~
|
||
|
||
.. autoclass:: _pytest.python.Module()
|
||
:members:
|
||
:show-inheritance:
|
||
|
||
Node
|
||
~~~~
|
||
|
||
.. autoclass:: _pytest.nodes.Node()
|
||
:members:
|
||
|
||
Parser
|
||
~~~~~~
|
||
|
||
.. autoclass:: _pytest.config.argparsing.Parser()
|
||
:members:
|
||
|
||
PluginManager
|
||
~~~~~~~~~~~~~
|
||
|
||
.. autoclass:: pluggy.PluginManager()
|
||
:members:
|
||
|
||
|
||
PytestPluginManager
|
||
~~~~~~~~~~~~~~~~~~~
|
||
|
||
.. autoclass:: _pytest.config.PytestPluginManager()
|
||
:members:
|
||
:undoc-members:
|
||
:show-inheritance:
|
||
|
||
Session
|
||
~~~~~~~
|
||
|
||
.. autoclass:: _pytest.main.Session()
|
||
:members:
|
||
:show-inheritance:
|
||
|
||
TestReport
|
||
~~~~~~~~~~
|
||
|
||
.. autoclass:: _pytest.runner.TestReport()
|
||
:members:
|
||
:inherited-members:
|
||
|
||
_Result
|
||
~~~~~~~
|
||
|
||
.. autoclass:: pluggy.callers._Result
|
||
:members:
|
||
|
||
Special Variables
|
||
-----------------
|
||
|
||
pytest treats some global variables in a special manner when defined in a test module.
|
||
|
||
|
||
collect_ignore
|
||
~~~~~~~~~~~~~~
|
||
|
||
**Tutorial**: :ref:`customizing-test-collection`
|
||
|
||
Can be declared in *conftest.py files* to exclude test directories or modules.
|
||
Needs to be ``list[str]``.
|
||
|
||
.. code-block:: python
|
||
|
||
collect_ignore = ["setup.py"]
|
||
|
||
|
||
collect_ignore_glob
|
||
~~~~~~~~~~~~~~~~~~~
|
||
|
||
**Tutorial**: :ref:`customizing-test-collection`
|
||
|
||
Can be declared in *conftest.py files* to exclude test directories or modules
|
||
with Unix shell-style wildcards. Needs to be ``list[str]`` where ``str`` can
|
||
contain glob patterns.
|
||
|
||
.. code-block:: python
|
||
|
||
collect_ignore_glob = ["*_ignore.py"]
|
||
|
||
|
||
pytest_plugins
|
||
~~~~~~~~~~~~~~
|
||
|
||
**Tutorial**: :ref:`available installable plugins`
|
||
|
||
Can be declared at the **global** level in *test modules* and *conftest.py files* to register additional plugins.
|
||
Can be either a ``str`` or ``Sequence[str]``.
|
||
|
||
.. code-block:: python
|
||
|
||
pytest_plugins = "myapp.testsupport.myplugin"
|
||
|
||
.. code-block:: python
|
||
|
||
pytest_plugins = ("myapp.testsupport.tools", "myapp.testsupport.regression")
|
||
|
||
|
||
pytest_mark
|
||
~~~~~~~~~~~
|
||
|
||
**Tutorial**: :ref:`scoped-marking`
|
||
|
||
Can be declared at the **global** level in *test modules* to apply one or more :ref:`marks <marks ref>` to all
|
||
test functions and methods. Can be either a single mark or a list of marks.
|
||
|
||
.. code-block:: python
|
||
|
||
import pytest
|
||
|
||
pytestmark = pytest.mark.webtest
|
||
|
||
|
||
.. code-block:: python
|
||
|
||
import pytest
|
||
|
||
pytestmark = [pytest.mark.integration, pytest.mark.slow]
|
||
|
||
PYTEST_DONT_REWRITE (module docstring)
|
||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||
|
||
The text ``PYTEST_DONT_REWRITE`` can be add to any **module docstring** to disable
|
||
:ref:`assertion rewriting <assert introspection>` for that module.
|
||
|
||
|
||
Environment Variables
|
||
---------------------
|
||
|
||
Environment variables that can be used to change pytest's behavior.
|
||
|
||
PYTEST_ADDOPTS
|
||
~~~~~~~~~~~~~~
|
||
|
||
This contains a command-line (parsed by the py:mod:`shlex` module) that will be **prepended** to the command line given
|
||
by the user, see :ref:`adding default options` for more information.
|
||
|
||
PYTEST_DEBUG
|
||
~~~~~~~~~~~~
|
||
|
||
When set, pytest will print tracing and debug information.
|
||
|
||
PYTEST_PLUGINS
|
||
~~~~~~~~~~~~~~
|
||
|
||
Contains comma-separated list of modules that should be loaded as plugins:
|
||
|
||
.. code-block:: bash
|
||
|
||
export PYTEST_PLUGINS=mymodule.plugin,xdist
|
||
|
||
PYTEST_DISABLE_PLUGIN_AUTOLOAD
|
||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||
|
||
When set, disables plugin auto-loading through setuptools entrypoints. Only explicitly specified plugins will be
|
||
loaded.
|
||
|
||
PYTEST_CURRENT_TEST
|
||
~~~~~~~~~~~~~~~~~~~
|
||
|
||
This is not meant to be set by users, but is set by pytest internally with the name of the current test so other
|
||
processes can inspect it, see :ref:`pytest current test env` for more information.
|
||
|
||
|
||
.. _`ini options ref`:
|
||
|
||
Configuration Options
|
||
---------------------
|
||
|
||
Here is a list of builtin configuration options that may be written in a ``pytest.ini``, ``tox.ini`` or ``setup.cfg``
|
||
file, usually located at the root of your repository. All options must be under a ``[pytest]`` section
|
||
(``[tool:pytest]`` for ``setup.cfg`` files).
|
||
|
||
.. warning::
|
||
Usage of ``setup.cfg`` is not recommended unless for very simple use cases. ``.cfg``
|
||
files use a different parser than ``pytest.ini`` and ``tox.ini`` which might cause hard to track
|
||
down problems.
|
||
When possible, it is recommended to use the latter files to hold your pytest configuration.
|
||
|
||
Configuration file options may be overwritten in the command-line by using ``-o/--override``, which can also be
|
||
passed multiple times. The expected format is ``name=value``. For example::
|
||
|
||
pytest -o console_output_style=classic -o cache_dir=/tmp/mycache
|
||
|
||
|
||
.. confval:: addopts
|
||
|
||
Add the specified ``OPTS`` to the set of command line arguments as if they
|
||
had been specified by the user. Example: if you have this ini file content:
|
||
|
||
.. code-block:: ini
|
||
|
||
# content of pytest.ini
|
||
[pytest]
|
||
addopts = --maxfail=2 -rf # exit after 2 failures, report fail info
|
||
|
||
issuing ``pytest test_hello.py`` actually means::
|
||
|
||
pytest --maxfail=2 -rf test_hello.py
|
||
|
||
Default is to add no options.
|
||
|
||
|
||
.. confval:: cache_dir
|
||
|
||
|
||
|
||
Sets a directory where stores content of cache plugin. Default directory is
|
||
``.pytest_cache`` which is created in :ref:`rootdir <rootdir>`. Directory may be
|
||
relative or absolute path. If setting relative path, then directory is created
|
||
relative to :ref:`rootdir <rootdir>`. Additionally path may contain environment
|
||
variables, that will be expanded. For more information about cache plugin
|
||
please refer to :ref:`cache_provider`.
|
||
|
||
|
||
.. confval:: confcutdir
|
||
|
||
Sets a directory where search upwards for ``conftest.py`` files stops.
|
||
By default, pytest will stop searching for ``conftest.py`` files upwards
|
||
from ``pytest.ini``/``tox.ini``/``setup.cfg`` of the project if any,
|
||
or up to the file-system root.
|
||
|
||
|
||
.. confval:: console_output_style
|
||
|
||
|
||
|
||
Sets the console output style while running tests:
|
||
|
||
* ``classic``: classic pytest output.
|
||
* ``progress``: like classic pytest output, but with a progress indicator.
|
||
* ``count``: like progress, but shows progress as the number of tests completed instead of a percent.
|
||
|
||
The default is ``progress``, but you can fallback to ``classic`` if you prefer or
|
||
the new mode is causing unexpected problems:
|
||
|
||
.. code-block:: ini
|
||
|
||
# content of pytest.ini
|
||
[pytest]
|
||
console_output_style = classic
|
||
|
||
|
||
.. confval:: doctest_encoding
|
||
|
||
|
||
|
||
Default encoding to use to decode text files with docstrings.
|
||
:doc:`See how pytest handles doctests <doctest>`.
|
||
|
||
|
||
.. confval:: doctest_optionflags
|
||
|
||
One or more doctest flag names from the standard ``doctest`` module.
|
||
:doc:`See how pytest handles doctests <doctest>`.
|
||
|
||
|
||
.. confval:: empty_parameter_set_mark
|
||
|
||
|
||
|
||
Allows to pick the action for empty parametersets in parameterization
|
||
|
||
* ``skip`` skips tests with an empty parameterset (default)
|
||
* ``xfail`` marks tests with an empty parameterset as xfail(run=False)
|
||
* ``fail_at_collect`` raises an exception if parametrize collects an empty parameter set
|
||
|
||
.. code-block:: ini
|
||
|
||
# content of pytest.ini
|
||
[pytest]
|
||
empty_parameter_set_mark = xfail
|
||
|
||
.. note::
|
||
|
||
The default value of this option is planned to change to ``xfail`` in future releases
|
||
as this is considered less error prone, see `#3155 <https://github.com/pytest-dev/pytest/issues/3155>`_
|
||
for more details.
|
||
|
||
|
||
.. confval:: filterwarnings
|
||
|
||
|
||
|
||
Sets a list of filters and actions that should be taken for matched
|
||
warnings. By default all warnings emitted during the test session
|
||
will be displayed in a summary at the end of the test session.
|
||
|
||
.. code-block:: ini
|
||
|
||
# content of pytest.ini
|
||
[pytest]
|
||
filterwarnings =
|
||
error
|
||
ignore::DeprecationWarning
|
||
|
||
This tells pytest to ignore deprecation warnings and turn all other warnings
|
||
into errors. For more information please refer to :ref:`warnings`.
|
||
|
||
|
||
.. confval:: junit_duration_report
|
||
|
||
.. versionadded:: 4.1
|
||
|
||
Configures how durations are recorded into the JUnit XML report:
|
||
|
||
* ``total`` (the default): duration times reported include setup, call, and teardown times.
|
||
* ``call``: duration times reported include only call times, excluding setup and teardown.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
junit_duration_report = call
|
||
|
||
|
||
.. confval:: junit_family
|
||
|
||
.. versionadded:: 4.2
|
||
|
||
Configures the format of the generated JUnit XML file. The possible options are:
|
||
|
||
* ``xunit1`` (or ``legacy``): produces old style output, compatible with the xunit 1.0 format. **This is the default**.
|
||
* ``xunit2``: produces `xunit 2.0 style output <https://github.com/jenkinsci/xunit-plugin/blob/xunit-2.3.2/src/main/resources/org/jenkinsci/plugins/xunit/types/model/xsd/junit-10.xsd>`__,
|
||
which should be more compatible with latest Jenkins versions.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
junit_family = xunit2
|
||
|
||
|
||
.. confval:: junit_logging
|
||
|
||
.. versionadded:: 3.5
|
||
|
||
Configures if stdout/stderr should be written to the JUnit XML file. Valid values are
|
||
``system-out``, ``system-err``, and ``no`` (the default).
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
junit_logging = system-out
|
||
|
||
|
||
.. confval:: junit_log_passing_tests
|
||
|
||
.. versionadded:: 4.6
|
||
|
||
If ``junit_logging != "no"``, configures if the captured output should be written
|
||
to the JUnit XML file for **passing** tests. Default is ``True``.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
junit_log_passing_tests = False
|
||
|
||
|
||
.. confval:: junit_suite_name
|
||
|
||
To set the name of the root test suite xml item, you can configure the ``junit_suite_name`` option in your config file:
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
junit_suite_name = my_suite
|
||
|
||
|
||
.. confval:: log_cli_date_format
|
||
|
||
|
||
|
||
Sets a :py:func:`time.strftime`-compatible string that will be used when formatting dates for live logging.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
log_cli_date_format = %Y-%m-%d %H:%M:%S
|
||
|
||
For more information, see :ref:`live_logs`.
|
||
|
||
.. confval:: log_cli_format
|
||
|
||
|
||
|
||
Sets a :py:mod:`logging`-compatible string used to format live logging messages.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
log_cli_format = %(asctime)s %(levelname)s %(message)s
|
||
|
||
For more information, see :ref:`live_logs`.
|
||
|
||
|
||
.. confval:: log_cli_level
|
||
|
||
|
||
|
||
Sets the minimum log message level that should be captured for live logging. The integer value or
|
||
the names of the levels can be used.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
log_cli_level = INFO
|
||
|
||
For more information, see :ref:`live_logs`.
|
||
|
||
|
||
.. confval:: log_date_format
|
||
|
||
|
||
|
||
Sets a :py:func:`time.strftime`-compatible string that will be used when formatting dates for logging capture.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
log_date_format = %Y-%m-%d %H:%M:%S
|
||
|
||
For more information, see :ref:`logging`.
|
||
|
||
|
||
.. confval:: log_file
|
||
|
||
|
||
|
||
Sets a file name relative to the ``pytest.ini`` file where log messages should be written to, in addition
|
||
to the other logging facilities that are active.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
log_file = logs/pytest-logs.txt
|
||
|
||
For more information, see :ref:`logging`.
|
||
|
||
|
||
.. confval:: log_file_date_format
|
||
|
||
|
||
|
||
Sets a :py:func:`time.strftime`-compatible string that will be used when formatting dates for the logging file.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
log_file_date_format = %Y-%m-%d %H:%M:%S
|
||
|
||
For more information, see :ref:`logging`.
|
||
|
||
.. confval:: log_file_format
|
||
|
||
|
||
|
||
Sets a :py:mod:`logging`-compatible string used to format logging messages redirected to the logging file.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
log_file_format = %(asctime)s %(levelname)s %(message)s
|
||
|
||
For more information, see :ref:`logging`.
|
||
|
||
.. confval:: log_file_level
|
||
|
||
|
||
|
||
Sets the minimum log message level that should be captured for the logging file. The integer value or
|
||
the names of the levels can be used.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
log_file_level = INFO
|
||
|
||
For more information, see :ref:`logging`.
|
||
|
||
|
||
.. confval:: log_format
|
||
|
||
|
||
|
||
Sets a :py:mod:`logging`-compatible string used to format captured logging messages.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
log_format = %(asctime)s %(levelname)s %(message)s
|
||
|
||
For more information, see :ref:`logging`.
|
||
|
||
|
||
.. confval:: log_level
|
||
|
||
|
||
|
||
Sets the minimum log message level that should be captured for logging capture. The integer value or
|
||
the names of the levels can be used.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
log_level = INFO
|
||
|
||
For more information, see :ref:`logging`.
|
||
|
||
|
||
.. confval:: log_print
|
||
|
||
|
||
|
||
If set to ``False``, will disable displaying captured logging messages for failed tests.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
log_print = False
|
||
|
||
For more information, see :ref:`logging`.
|
||
|
||
|
||
.. confval:: markers
|
||
|
||
When the ``--strict-markers`` or ``--strict`` command-line arguments are used,
|
||
only known markers - defined in code by core pytest or some plugin - are allowed.
|
||
|
||
You can list additional markers in this setting to add them to the whitelist,
|
||
in which case you probably want to add ``--strict-markers`` to ``addopts``
|
||
to avoid future regressions:
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
addopts = --strict-markers
|
||
markers =
|
||
slow
|
||
serial
|
||
|
||
.. confval:: minversion
|
||
|
||
Specifies a minimal pytest version required for running tests.
|
||
|
||
.. code-block:: ini
|
||
|
||
# content of pytest.ini
|
||
[pytest]
|
||
minversion = 3.0 # will fail if we run with pytest-2.8
|
||
|
||
|
||
.. confval:: norecursedirs
|
||
|
||
Set the directory basename patterns to avoid when recursing
|
||
for test discovery. The individual (fnmatch-style) patterns are
|
||
applied to the basename of a directory to decide if to recurse into it.
|
||
Pattern matching characters::
|
||
|
||
* matches everything
|
||
? matches any single character
|
||
[seq] matches any character in seq
|
||
[!seq] matches any char not in seq
|
||
|
||
Default patterns are ``'.*', 'build', 'dist', 'CVS', '_darcs', '{arch}', '*.egg', 'venv'``.
|
||
Setting a ``norecursedirs`` replaces the default. Here is an example of
|
||
how to avoid certain directories:
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
norecursedirs = .svn _build tmp*
|
||
|
||
This would tell ``pytest`` to not look into typical subversion or
|
||
sphinx-build directories or into any ``tmp`` prefixed directory.
|
||
|
||
Additionally, ``pytest`` will attempt to intelligently identify and ignore a
|
||
virtualenv by the presence of an activation script. Any directory deemed to
|
||
be the root of a virtual environment will not be considered during test
|
||
collection unless ``‑‑collect‑in‑virtualenv`` is given. Note also that
|
||
``norecursedirs`` takes precedence over ``‑‑collect‑in‑virtualenv``; e.g. if
|
||
you intend to run tests in a virtualenv with a base directory that matches
|
||
``'.*'`` you *must* override ``norecursedirs`` in addition to using the
|
||
``‑‑collect‑in‑virtualenv`` flag.
|
||
|
||
|
||
.. confval:: python_classes
|
||
|
||
One or more name prefixes or glob-style patterns determining which classes
|
||
are considered for test collection. Search for multiple glob patterns by
|
||
adding a space between patterns. By default, pytest will consider any
|
||
class prefixed with ``Test`` as a test collection. Here is an example of how
|
||
to collect tests from classes that end in ``Suite``:
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
python_classes = *Suite
|
||
|
||
Note that ``unittest.TestCase`` derived classes are always collected
|
||
regardless of this option, as ``unittest``'s own collection framework is used
|
||
to collect those tests.
|
||
|
||
|
||
.. confval:: python_files
|
||
|
||
One or more Glob-style file patterns determining which python files
|
||
are considered as test modules. Search for multiple glob patterns by
|
||
adding a space between patterns:
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
python_files = test_*.py check_*.py example_*.py
|
||
|
||
Or one per line:
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
python_files =
|
||
test_*.py
|
||
check_*.py
|
||
example_*.py
|
||
|
||
By default, files matching ``test_*.py`` and ``*_test.py`` will be considered
|
||
test modules.
|
||
|
||
|
||
.. confval:: python_functions
|
||
|
||
One or more name prefixes or glob-patterns determining which test functions
|
||
and methods are considered tests. Search for multiple glob patterns by
|
||
adding a space between patterns. By default, pytest will consider any
|
||
function prefixed with ``test`` as a test. Here is an example of how
|
||
to collect test functions and methods that end in ``_test``:
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
python_functions = *_test
|
||
|
||
Note that this has no effect on methods that live on a ``unittest
|
||
.TestCase`` derived class, as ``unittest``'s own collection framework is used
|
||
to collect those tests.
|
||
|
||
See :ref:`change naming conventions` for more detailed examples.
|
||
|
||
|
||
.. confval:: testpaths
|
||
|
||
|
||
|
||
Sets list of directories that should be searched for tests when
|
||
no specific directories, files or test ids are given in the command line when
|
||
executing pytest from the :ref:`rootdir <rootdir>` directory.
|
||
Useful when all project tests are in a known location to speed up
|
||
test collection and to avoid picking up undesired tests by accident.
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
testpaths = testing doc
|
||
|
||
This tells pytest to only look for tests in ``testing`` and ``doc``
|
||
directories when executing from the root directory.
|
||
|
||
|
||
.. confval:: usefixtures
|
||
|
||
List of fixtures that will be applied to all test functions; this is semantically the same to apply
|
||
the ``@pytest.mark.usefixtures`` marker to all test functions.
|
||
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
usefixtures =
|
||
clean_db
|
||
|
||
|
||
.. confval:: xfail_strict
|
||
|
||
If set to ``True``, tests marked with ``@pytest.mark.xfail`` that actually succeed will by default fail the
|
||
test suite.
|
||
For more information, see :ref:`xfail strict tutorial`.
|
||
|
||
|
||
.. code-block:: ini
|
||
|
||
[pytest]
|
||
xfail_strict = True
|