1275 lines
38 KiB
ReStructuredText
1275 lines
38 KiB
ReStructuredText
.. _deprecations:
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Deprecations and Removals
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=========================
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This page lists all pytest features that are currently deprecated or have been removed in past major releases.
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The objective is to give users a clear rationale why a certain feature has been removed, and what alternatives
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should be used instead.
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.. contents::
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:depth: 3
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:local:
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Deprecated Features
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-------------------
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Below is a complete list of all pytest features which are considered deprecated. Using those features will issue
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:class:`~pytest.PytestWarning` or subclasses, which can be filtered using :ref:`standard warning filters <warnings>`.
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.. _nose-deprecation:
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Support for tests written for nose
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. deprecated:: 7.2
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Support for running tests written for `nose <https://nose.readthedocs.io/en/latest/>`__ is now deprecated.
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``nose`` has been in maintenance mode-only for years, and maintaining the plugin is not trivial as it spills
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over the code base (see :issue:`9886` for more details).
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setup/teardown
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^^^^^^^^^^^^^^
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One thing that might catch users by surprise is that plain ``setup`` and ``teardown`` methods are not pytest native,
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they are in fact part of the ``nose`` support.
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.. code-block:: python
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class Test:
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def setup(self):
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self.resource = make_resource()
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def teardown(self):
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self.resource.close()
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def test_foo(self):
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...
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def test_bar(self):
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...
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Native pytest support uses ``setup_method`` and ``teardown_method`` (see :ref:`xunit-method-setup`), so the above should be changed to:
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.. code-block:: python
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class Test:
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def setup_method(self):
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self.resource = make_resource()
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def teardown_method(self):
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self.resource.close()
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def test_foo(self):
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...
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def test_bar(self):
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...
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This is easy to do in an entire code base by doing a simple find/replace.
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@with_setup
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^^^^^^^^^^^
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Code using `@with_setup <with-setup-nose>`_ such as this:
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.. code-block:: python
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from nose.tools import with_setup
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def setup_some_resource():
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...
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def teardown_some_resource():
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...
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@with_setup(setup_some_resource, teardown_some_resource)
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def test_foo():
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...
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Will also need to be ported to a supported pytest style. One way to do it is using a fixture:
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.. code-block:: python
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import pytest
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def setup_some_resource():
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...
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def teardown_some_resource():
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...
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@pytest.fixture
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def some_resource():
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setup_some_resource()
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yield
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teardown_some_resource()
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def test_foo(some_resource):
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...
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.. _`with-setup-nose`: https://nose.readthedocs.io/en/latest/testing_tools.html?highlight=with_setup#nose.tools.with_setup
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.. _instance-collector-deprecation:
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The ``pytest.Instance`` collector
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. versionremoved:: 7.0
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The ``pytest.Instance`` collector type has been removed.
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Previously, Python test methods were collected as :class:`~pytest.Class` -> ``Instance`` -> :class:`~pytest.Function`.
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Now :class:`~pytest.Class` collects the test methods directly.
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Most plugins which reference ``Instance`` do so in order to ignore or skip it,
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using a check such as ``if isinstance(node, Instance): return``.
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Such plugins should simply remove consideration of ``Instance`` on pytest>=7.
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However, to keep such uses working, a dummy type has been instanted in ``pytest.Instance`` and ``_pytest.python.Instance``,
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and importing it emits a deprecation warning. This will be removed in pytest 8.
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.. _node-ctor-fspath-deprecation:
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``fspath`` argument for Node constructors replaced with ``pathlib.Path``
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. deprecated:: 7.0
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In order to support the transition from ``py.path.local`` to :mod:`pathlib`,
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the ``fspath`` argument to :class:`~_pytest.nodes.Node` constructors like
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:func:`pytest.Function.from_parent()` and :func:`pytest.Class.from_parent()`
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is now deprecated.
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Plugins which construct nodes should pass the ``path`` argument, of type
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:class:`pathlib.Path`, instead of the ``fspath`` argument.
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Plugins which implement custom items and collectors are encouraged to replace
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``fspath`` parameters (``py.path.local``) with ``path`` parameters
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(``pathlib.Path``), and drop any other usage of the ``py`` library if possible.
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If possible, plugins with custom items should use :ref:`cooperative
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constructors <uncooperative-constructors-deprecated>` to avoid hardcoding
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arguments they only pass on to the superclass.
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.. note::
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The name of the :class:`~_pytest.nodes.Node` arguments and attributes (the
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new attribute being ``path``) is **the opposite** of the situation for
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hooks, :ref:`outlined below <legacy-path-hooks-deprecated>` (the old
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argument being ``path``).
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This is an unfortunate artifact due to historical reasons, which should be
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resolved in future versions as we slowly get rid of the :pypi:`py`
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dependency (see :issue:`9283` for a longer discussion).
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Due to the ongoing migration of methods like :meth:`~pytest.Item.reportinfo`
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which still is expected to return a ``py.path.local`` object, nodes still have
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both ``fspath`` (``py.path.local``) and ``path`` (``pathlib.Path``) attributes,
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no matter what argument was used in the constructor. We expect to deprecate the
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``fspath`` attribute in a future release.
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.. _legacy-path-hooks-deprecated:
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Configuring hook specs/impls using markers
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Before pluggy, pytest's plugin library, was its own package and had a clear API,
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pytest just used ``pytest.mark`` to configure hooks.
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The :py:func:`pytest.hookimpl` and :py:func:`pytest.hookspec` decorators
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have been available since years and should be used instead.
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.. code-block:: python
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@pytest.mark.tryfirst
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def pytest_runtest_call():
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...
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# or
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def pytest_runtest_call():
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...
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pytest_runtest_call.tryfirst = True
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should be changed to:
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.. code-block:: python
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@pytest.hookimpl(tryfirst=True)
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def pytest_runtest_call():
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...
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Changed ``hookimpl`` attributes:
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* ``tryfirst``
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* ``trylast``
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* ``optionalhook``
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* ``hookwrapper``
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Changed ``hookwrapper`` attributes:
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* ``firstresult``
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* ``historic``
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``py.path.local`` arguments for hooks replaced with ``pathlib.Path``
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. deprecated:: 7.0
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In order to support the transition from ``py.path.local`` to :mod:`pathlib`, the following hooks now receive additional arguments:
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* :hook:`pytest_ignore_collect(collection_path: pathlib.Path) <pytest_ignore_collect>` as equivalent to ``path``
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* :hook:`pytest_collect_file(file_path: pathlib.Path) <pytest_collect_file>` as equivalent to ``path``
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* :hook:`pytest_pycollect_makemodule(module_path: pathlib.Path) <pytest_pycollect_makemodule>` as equivalent to ``path``
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* :hook:`pytest_report_header(start_path: pathlib.Path) <pytest_report_header>` as equivalent to ``startdir``
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* :hook:`pytest_report_collectionfinish(start_path: pathlib.Path) <pytest_report_collectionfinish>` as equivalent to ``startdir``
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The accompanying ``py.path.local`` based paths have been deprecated: plugins which manually invoke those hooks should only pass the new ``pathlib.Path`` arguments, and users should change their hook implementations to use the new ``pathlib.Path`` arguments.
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.. note::
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The name of the :class:`~_pytest.nodes.Node` arguments and attributes,
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:ref:`outlined above <node-ctor-fspath-deprecation>` (the new attribute
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being ``path``) is **the opposite** of the situation for hooks (the old
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argument being ``path``).
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This is an unfortunate artifact due to historical reasons, which should be
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resolved in future versions as we slowly get rid of the :pypi:`py`
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dependency (see :issue:`9283` for a longer discussion).
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Directly constructing internal classes
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. deprecated:: 7.0
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Directly constructing the following classes is now deprecated:
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- ``_pytest.mark.structures.Mark``
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- ``_pytest.mark.structures.MarkDecorator``
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- ``_pytest.mark.structures.MarkGenerator``
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- ``_pytest.python.Metafunc``
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- ``_pytest.runner.CallInfo``
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- ``_pytest._code.ExceptionInfo``
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- ``_pytest.config.argparsing.Parser``
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- ``_pytest.config.argparsing.OptionGroup``
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- ``_pytest.pytester.HookRecorder``
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These constructors have always been considered private, but now issue a deprecation warning, which may become a hard error in pytest 8.
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.. _cmdline-preparse-deprecated:
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Passing ``msg=`` to ``pytest.skip``, ``pytest.fail`` or ``pytest.exit``
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. deprecated:: 7.0
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Passing the keyword argument ``msg`` to :func:`pytest.skip`, :func:`pytest.fail` or :func:`pytest.exit`
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is now deprecated and ``reason`` should be used instead. This change is to bring consistency between these
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functions and the ``@pytest.mark.skip`` and ``@pytest.mark.xfail`` markers which already accept a ``reason`` argument.
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.. code-block:: python
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def test_fail_example():
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# old
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pytest.fail(msg="foo")
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# new
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pytest.fail(reason="bar")
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def test_skip_example():
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# old
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pytest.skip(msg="foo")
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# new
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pytest.skip(reason="bar")
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def test_exit_example():
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# old
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pytest.exit(msg="foo")
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# new
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pytest.exit(reason="bar")
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Implementing the ``pytest_cmdline_preparse`` hook
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. deprecated:: 7.0
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Implementing the :hook:`pytest_cmdline_preparse` hook has been officially deprecated.
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Implement the :hook:`pytest_load_initial_conftests` hook instead.
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.. code-block:: python
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def pytest_cmdline_preparse(config: Config, args: List[str]) -> None:
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...
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# becomes:
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def pytest_load_initial_conftests(
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early_config: Config, parser: Parser, args: List[str]
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) -> None:
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...
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.. _diamond-inheritance-deprecated:
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Diamond inheritance between :class:`pytest.Collector` and :class:`pytest.Item`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. deprecated:: 7.0
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Defining a custom pytest node type which is both an :class:`~pytest.Item` and a :class:`~pytest.Collector` (e.g. :class:`~pytest.File`) now issues a warning.
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It was never sanely supported and triggers hard to debug errors.
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Some plugins providing linting/code analysis have been using this as a hack.
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Instead, a separate collector node should be used, which collects the item. See
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:ref:`non-python tests` for an example, as well as an `example pr fixing inheritance`_.
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.. _example pr fixing inheritance: https://github.com/asmeurer/pytest-flakes/pull/40/files
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.. _uncooperative-constructors-deprecated:
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Constructors of custom :class:`~_pytest.nodes.Node` subclasses should take ``**kwargs``
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. deprecated:: 7.0
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If custom subclasses of nodes like :class:`pytest.Item` override the
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``__init__`` method, they should take ``**kwargs``. Thus,
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.. code-block:: python
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class CustomItem(pytest.Item):
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def __init__(self, name, parent, additional_arg):
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super().__init__(name, parent)
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self.additional_arg = additional_arg
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should be turned into:
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.. code-block:: python
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class CustomItem(pytest.Item):
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def __init__(self, *, additional_arg, **kwargs):
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super().__init__(**kwargs)
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self.additional_arg = additional_arg
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to avoid hard-coding the arguments pytest can pass to the superclass.
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See :ref:`non-python tests` for a full example.
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For cases without conflicts, no deprecation warning is emitted. For cases with
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conflicts (such as :class:`pytest.File` now taking ``path`` instead of
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``fspath``, as :ref:`outlined above <node-ctor-fspath-deprecation>`), a
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deprecation warning is now raised.
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Applying a mark to a fixture function
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-------------------------------------
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.. deprecated:: 7.4
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Applying a mark to a fixture function never had any effect, but it is a common user error.
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.. code-block:: python
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@pytest.mark.usefixtures("clean_database")
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@pytest.fixture
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def user() -> User:
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...
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Users expected in this case that the ``usefixtures`` mark would have its intended effect of using the ``clean_database`` fixture when ``user`` was invoked, when in fact it has no effect at all.
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Now pytest will issue a warning when it encounters this problem, and will raise an error in the future versions.
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Backward compatibilities in ``Parser.addoption``
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. deprecated:: 2.4
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Several behaviors of :meth:`Parser.addoption <pytest.Parser.addoption>` are now
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scheduled for removal in pytest 8 (deprecated since pytest 2.4.0):
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- ``parser.addoption(..., help=".. %default ..")`` - use ``%(default)s`` instead.
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- ``parser.addoption(..., type="int/string/float/complex")`` - use ``type=int`` etc. instead.
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Using ``pytest.warns(None)``
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. deprecated:: 7.0
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:func:`pytest.warns(None) <pytest.warns>` is now deprecated because it was frequently misused.
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Its correct usage was checking that the code emits at least one warning of any type - like ``pytest.warns()``
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or ``pytest.warns(Warning)``.
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See :ref:`warns use cases` for examples.
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Returning non-None value in test functions
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. deprecated:: 7.2
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A :class:`pytest.PytestReturnNotNoneWarning` is now emitted if a test function returns something other than `None`.
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This prevents a common mistake among beginners that expect that returning a `bool` would cause a test to pass or fail, for example:
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.. code-block:: python
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@pytest.mark.parametrize(
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["a", "b", "result"],
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[
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[1, 2, 5],
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[2, 3, 8],
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[5, 3, 18],
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],
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)
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def test_foo(a, b, result):
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return foo(a, b) == result
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Given that pytest ignores the return value, this might be surprising that it will never fail.
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The proper fix is to change the `return` to an `assert`:
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.. code-block:: python
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@pytest.mark.parametrize(
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["a", "b", "result"],
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[
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[1, 2, 5],
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[2, 3, 8],
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[5, 3, 18],
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],
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)
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def test_foo(a, b, result):
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assert foo(a, b) == result
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The ``--strict`` command-line option
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. deprecated:: 6.2
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The ``--strict`` command-line option has been deprecated in favor of ``--strict-markers``, which
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better conveys what the option does.
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We have plans to maybe in the future to reintroduce ``--strict`` and make it an encompassing
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flag for all strictness related options (``--strict-markers`` and ``--strict-config``
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at the moment, more might be introduced in the future).
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The ``yield_fixture`` function/decorator
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. deprecated:: 6.2
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``pytest.yield_fixture`` is a deprecated alias for :func:`pytest.fixture`.
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It has been so for a very long time, so can be search/replaced safely.
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Removed Features and Breaking Changes
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-------------------------------------
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As stated in our :ref:`backwards-compatibility` policy, deprecated features are removed only in major releases after
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an appropriate period of deprecation has passed.
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Some breaking changes which could not be deprecated are also listed.
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Collection changes in pytest 8
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Added a new :class:`pytest.Directory` base collection node, which all collector nodes for filesystem directories are expected to subclass.
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This is analogous to the existing :class:`pytest.File` for file nodes.
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Changed :class:`pytest.Package` to be a subclass of :class:`pytest.Directory`.
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A ``Package`` represents a filesystem directory which is a Python package,
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i.e. contains an ``__init__.py`` file.
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:class:`pytest.Package` now only collects files in its own directory; previously it collected recursively.
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Sub-directories are collected as sub-collector nodes, thus creating a collection tree which mirrors the filesystem hierarchy.
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:attr:`session.name <pytest.Session.name>` is now ``""``; previously it was the rootdir directory name.
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This matches :attr:`session.nodeid <_pytest.nodes.Node.nodeid>` which has always been `""`.
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Added a new :class:`pytest.Dir` concrete collection node, a subclass of :class:`pytest.Directory`.
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This node represents a filesystem directory, which is not a :class:`pytest.Package`,
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i.e. does not contain an ``__init__.py`` file.
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Similarly to ``Package``, it only collects the files in its own directory,
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while collecting sub-directories as sub-collector nodes.
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Files and directories are now collected in alphabetical order jointly, unless changed by a plugin.
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Previously, files were collected before directories.
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The collection tree now contains directories/packages up to the :ref:`rootdir <rootdir>`,
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for initial arguments that are found within the rootdir.
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For files outside the rootdir, only the immediate directory/package is collected --
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note however that collecting from outside the rootdir is discouraged.
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As an example, given the following filesystem tree::
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myroot/
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pytest.ini
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top/
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├── 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 :class:`~pytest.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.
|
|
|
|
|
|
:class:`pytest.Package` is no longer a :class:`pytest.Module` or :class:`pytest.File`
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionchanged:: 8.0
|
|
|
|
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 :issue:`11137` and :issue:`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 :confval:`python_files` to include ``__init__.py`` files).
|
|
|
|
|
|
Collecting ``__init__.py`` files no longer collects package
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 8.0
|
|
|
|
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 :confval:`python_files` was changed to allow `__init__.py` file).
|
|
|
|
To collect the entire package, specify just the directory: `pytest pkg`.
|
|
|
|
|
|
The ``pytest.collect`` module
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. deprecated:: 6.0
|
|
.. versionremoved:: 7.0
|
|
|
|
The ``pytest.collect`` module is no longer part of the public API, all its names
|
|
should now be imported from ``pytest`` directly instead.
|
|
|
|
|
|
|
|
The ``pytest_warning_captured`` hook
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. deprecated:: 6.0
|
|
.. versionremoved:: 7.0
|
|
|
|
This hook has an `item` parameter which cannot be serialized by ``pytest-xdist``.
|
|
|
|
Use the ``pytest_warning_recorded`` hook instead, which replaces the ``item`` parameter
|
|
by a ``nodeid`` parameter.
|
|
|
|
|
|
|
|
The ``pytest._fillfuncargs`` function
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. deprecated:: 6.0
|
|
.. versionremoved:: 7.0
|
|
|
|
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.
|
|
|
|
|
|
``--no-print-logs`` command-line option
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. deprecated:: 5.4
|
|
.. versionremoved:: 6.0
|
|
|
|
|
|
The ``--no-print-logs`` option and ``log_print`` ini setting are removed. If
|
|
you used them, please use ``--show-capture`` instead.
|
|
|
|
A ``--show-capture`` command-line option was added in ``pytest 3.5.0`` which allows to specify how to
|
|
display captured output when tests fail: ``no``, ``stdout``, ``stderr``, ``log`` or ``all`` (the default).
|
|
|
|
|
|
.. _resultlog deprecated:
|
|
|
|
Result log (``--result-log``)
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. deprecated:: 4.0
|
|
.. versionremoved:: 6.0
|
|
|
|
The ``--result-log`` option produces a stream of test reports which can be
|
|
analysed at runtime, but it uses a custom format which requires users to implement their own
|
|
parser.
|
|
|
|
The `pytest-reportlog <https://github.com/pytest-dev/pytest-reportlog>`__ plugin provides a ``--report-log`` option, a more standard and extensible alternative, producing
|
|
one JSON object per-line, and should cover the same use cases. Please try it out and provide feedback.
|
|
|
|
The ``pytest-reportlog`` plugin might even be merged into the core
|
|
at some point, depending on the plans for the plugins and number of users using it.
|
|
|
|
``pytest_collect_directory`` hook
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 6.0
|
|
|
|
The ``pytest_collect_directory`` hook has not worked properly for years (it was called
|
|
but the results were ignored). Users may consider using :hook:`pytest_collection_modifyitems` instead.
|
|
|
|
TerminalReporter.writer
|
|
~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 6.0
|
|
|
|
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``.
|
|
|
|
Plugins that used ``TerminalReporter.writer`` directly should instead use ``TerminalReporter``
|
|
methods that provide the same functionality.
|
|
|
|
.. _junit-family changed default value:
|
|
|
|
``junit_family`` default value change to "xunit2"
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionchanged:: 6.0
|
|
|
|
The default value of ``junit_family`` option will change to ``xunit2`` in pytest 6.0, which
|
|
is an update of the old ``xunit1`` format and is supported by default in modern tools
|
|
that manipulate this type of file (for example, Jenkins, Azure Pipelines, etc.).
|
|
|
|
Users are recommended to try the new ``xunit2`` format and see if their tooling that consumes the JUnit
|
|
XML file supports it.
|
|
|
|
To use the new format, update your ``pytest.ini``:
|
|
|
|
.. code-block:: ini
|
|
|
|
[pytest]
|
|
junit_family=xunit2
|
|
|
|
If you discover that your tooling does not support the new format, and want to keep using the
|
|
legacy version, set the option to ``legacy`` instead:
|
|
|
|
.. code-block:: ini
|
|
|
|
[pytest]
|
|
junit_family=legacy
|
|
|
|
By using ``legacy`` you will keep using the legacy/xunit1 format when upgrading to
|
|
pytest 6.0, where the default format will be ``xunit2``.
|
|
|
|
In order to let users know about the transition, pytest will issue a warning in case
|
|
the ``--junit-xml`` option is given in the command line but ``junit_family`` is not explicitly
|
|
configured in ``pytest.ini``.
|
|
|
|
Services known to support the ``xunit2`` format:
|
|
|
|
* `Jenkins <https://www.jenkins.io/>`__ with the `JUnit <https://plugins.jenkins.io/junit>`__ plugin.
|
|
* `Azure Pipelines <https://azure.microsoft.com/en-us/services/devops/pipelines>`__.
|
|
|
|
Node Construction changed to ``Node.from_parent``
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionchanged:: 6.0
|
|
|
|
The construction of nodes now should use the named constructor ``from_parent``.
|
|
This limitation in api surface intends to enable better/simpler refactoring of the collection tree.
|
|
|
|
This means that instead of :code:`MyItem(name="foo", parent=collector, obj=42)`
|
|
one now has to invoke :code:`MyItem.from_parent(collector, name="foo")`.
|
|
|
|
Plugins that wish to support older versions of pytest and suppress the warning can use
|
|
`hasattr` to check if `from_parent` exists in that version:
|
|
|
|
.. code-block:: python
|
|
|
|
def pytest_pycollect_makeitem(collector, name, obj):
|
|
if hasattr(MyItem, "from_parent"):
|
|
item = MyItem.from_parent(collector, name="foo")
|
|
item.obj = 42
|
|
return item
|
|
else:
|
|
return MyItem(name="foo", parent=collector, obj=42)
|
|
|
|
Note that ``from_parent`` should only be called with keyword arguments for the parameters.
|
|
|
|
|
|
``pytest.fixture`` arguments are keyword only
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 6.0
|
|
|
|
Passing arguments to pytest.fixture() as positional arguments has been removed - pass them by keyword instead.
|
|
|
|
``funcargnames`` alias for ``fixturenames``
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 6.0
|
|
|
|
The ``FixtureRequest``, ``Metafunc``, and ``Function`` classes track the names of
|
|
their associated fixtures, with the aptly-named ``fixturenames`` attribute.
|
|
|
|
Prior to pytest 2.3, this attribute was named ``funcargnames``, and we have kept
|
|
that as an alias since. It is finally due for removal, as it is often confusing
|
|
in places where we or plugin authors must distinguish between fixture names and
|
|
names supplied by non-fixture things such as ``pytest.mark.parametrize``.
|
|
|
|
|
|
.. _pytest.config global deprecated:
|
|
|
|
``pytest.config`` global
|
|
~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 5.0
|
|
|
|
The ``pytest.config`` global object is deprecated. Instead use
|
|
``request.config`` (via the ``request`` fixture) or if you are a plugin author
|
|
use the ``pytest_configure(config)`` hook. Note that many hooks can also access
|
|
the ``config`` object indirectly, through ``session.config`` or ``item.config`` for example.
|
|
|
|
|
|
.. _`raises message deprecated`:
|
|
|
|
``"message"`` parameter of ``pytest.raises``
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 5.0
|
|
|
|
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 prevent
|
|
users from making 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 a valid use case for this parameter, consider that to obtain the same results
|
|
you can just call ``pytest.fail`` manually at the end of the ``with`` statement.
|
|
|
|
For example:
|
|
|
|
.. code-block:: python
|
|
|
|
with pytest.raises(TimeoutError, message="Client got unexpected message"):
|
|
wait_for(websocket.recv(), 0.5)
|
|
|
|
|
|
Becomes:
|
|
|
|
.. code-block:: python
|
|
|
|
with pytest.raises(TimeoutError):
|
|
wait_for(websocket.recv(), 0.5)
|
|
pytest.fail("Client got unexpected message")
|
|
|
|
|
|
If you still have concerns about this deprecation and future removal, please comment on
|
|
:issue:`3974`.
|
|
|
|
|
|
.. _raises-warns-exec:
|
|
|
|
``raises`` / ``warns`` with a string as the second argument
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 5.0
|
|
|
|
Use the context manager form of these instead. When necessary, invoke ``exec``
|
|
directly.
|
|
|
|
Example:
|
|
|
|
.. code-block:: python
|
|
|
|
pytest.raises(ZeroDivisionError, "1 / 0")
|
|
pytest.raises(SyntaxError, "a $ b")
|
|
|
|
pytest.warns(DeprecationWarning, "my_function()")
|
|
pytest.warns(SyntaxWarning, "assert(1, 2)")
|
|
|
|
Becomes:
|
|
|
|
.. code-block:: python
|
|
|
|
with pytest.raises(ZeroDivisionError):
|
|
1 / 0
|
|
with pytest.raises(SyntaxError):
|
|
exec("a $ b") # exec is required for invalid syntax
|
|
|
|
with pytest.warns(DeprecationWarning):
|
|
my_function()
|
|
with pytest.warns(SyntaxWarning):
|
|
exec("assert(1, 2)") # exec is used to avoid a top-level warning
|
|
|
|
|
|
|
|
|
|
Using ``Class`` in custom Collectors
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
|
|
|
|
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_pycollect_makeitem`` 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.
|
|
|
|
|
|
.. _marks in pytest.parametrize deprecated:
|
|
|
|
marks in ``pytest.mark.parametrize``
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
|
|
|
|
Applying marks to values of a ``pytest.mark.parametrize`` call is now deprecated. For example:
|
|
|
|
.. code-block:: python
|
|
|
|
@pytest.mark.parametrize(
|
|
"a, b",
|
|
[
|
|
(3, 9),
|
|
pytest.mark.xfail(reason="flaky")(6, 36),
|
|
(10, 100),
|
|
(20, 200),
|
|
(40, 400),
|
|
(50, 500),
|
|
],
|
|
)
|
|
def test_foo(a, b):
|
|
...
|
|
|
|
This code applies the ``pytest.mark.xfail(reason="flaky")`` mark to the ``(6, 36)`` value of the above parametrization
|
|
call.
|
|
|
|
This was considered hard to read and understand, and also its implementation presented problems to the code preventing
|
|
further internal improvements in the marks architecture.
|
|
|
|
To update the code, use ``pytest.param``:
|
|
|
|
.. code-block:: python
|
|
|
|
@pytest.mark.parametrize(
|
|
"a, b",
|
|
[
|
|
(3, 9),
|
|
pytest.param(6, 36, marks=pytest.mark.xfail(reason="flaky")),
|
|
(10, 100),
|
|
(20, 200),
|
|
(40, 400),
|
|
(50, 500),
|
|
],
|
|
)
|
|
def test_foo(a, b):
|
|
...
|
|
|
|
|
|
.. _pytest_funcarg__ prefix deprecated:
|
|
|
|
``pytest_funcarg__`` prefix
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
|
|
|
|
In very early pytest versions fixtures could be defined using the ``pytest_funcarg__`` prefix:
|
|
|
|
.. code-block:: python
|
|
|
|
def pytest_funcarg__data():
|
|
return SomeData()
|
|
|
|
Switch over to the ``@pytest.fixture`` decorator:
|
|
|
|
.. code-block:: python
|
|
|
|
@pytest.fixture
|
|
def data():
|
|
return SomeData()
|
|
|
|
|
|
|
|
[pytest] section in setup.cfg files
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
|
|
|
|
``[pytest]`` sections in ``setup.cfg`` files should now be named ``[tool:pytest]``
|
|
to avoid conflicts with other distutils commands.
|
|
|
|
|
|
.. _metafunc.addcall deprecated:
|
|
|
|
Metafunc.addcall
|
|
~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
|
|
|
|
``Metafunc.addcall`` was a precursor to the current parametrized mechanism. Users should use
|
|
:meth:`pytest.Metafunc.parametrize` instead.
|
|
|
|
Example:
|
|
|
|
.. code-block:: python
|
|
|
|
def pytest_generate_tests(metafunc):
|
|
metafunc.addcall({"i": 1}, id="1")
|
|
metafunc.addcall({"i": 2}, id="2")
|
|
|
|
Becomes:
|
|
|
|
.. code-block:: python
|
|
|
|
def pytest_generate_tests(metafunc):
|
|
metafunc.parametrize("i", [1, 2], ids=["1", "2"])
|
|
|
|
|
|
.. _cached_setup deprecated:
|
|
|
|
``cached_setup``
|
|
~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
|
|
|
|
``request.cached_setup`` was the precursor of the setup/teardown mechanism available to fixtures.
|
|
|
|
Example:
|
|
|
|
.. code-block:: python
|
|
|
|
@pytest.fixture
|
|
def db_session():
|
|
return request.cached_setup(
|
|
setup=Session.create, teardown=lambda session: session.close(), scope="module"
|
|
)
|
|
|
|
This should be updated to make use of standard fixture mechanisms:
|
|
|
|
.. code-block:: python
|
|
|
|
@pytest.fixture(scope="module")
|
|
def db_session():
|
|
session = Session.create()
|
|
yield session
|
|
session.close()
|
|
|
|
|
|
You can consult :std:doc:`funcarg comparison section in the docs <funcarg_compare>` for
|
|
more information.
|
|
|
|
|
|
.. _pytest_plugins in non-top-level conftest files deprecated:
|
|
|
|
pytest_plugins in non-top-level conftest files
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
|
|
|
|
Defining :globalvar:`pytest_plugins` is now deprecated in non-top-level conftest.py
|
|
files because they will activate referenced plugins *globally*, which is surprising because for all other pytest
|
|
features ``conftest.py`` files are only *active* for tests at or below it.
|
|
|
|
|
|
.. _config.warn and node.warn deprecated:
|
|
|
|
``Config.warn`` and ``Node.warn``
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
|
|
|
|
Those methods were part of the internal pytest warnings system, but since ``3.8`` pytest is using the builtin warning
|
|
system for its own warnings, so those two functions are now deprecated.
|
|
|
|
``Config.warn`` should be replaced by calls to the standard ``warnings.warn``, example:
|
|
|
|
.. code-block:: python
|
|
|
|
config.warn("C1", "some warning")
|
|
|
|
Becomes:
|
|
|
|
.. code-block:: python
|
|
|
|
warnings.warn(pytest.PytestWarning("some warning"))
|
|
|
|
``Node.warn`` now supports two signatures:
|
|
|
|
* ``node.warn(PytestWarning("some message"))``: is now the **recommended** way to call this function.
|
|
The warning instance must be a PytestWarning or subclass.
|
|
|
|
* ``node.warn("CI", "some message")``: this code/message form has been **removed** and should be converted to the warning instance form above.
|
|
|
|
.. _record_xml_property deprecated:
|
|
|
|
record_xml_property
|
|
~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
|
|
|
|
The ``record_xml_property`` fixture is now deprecated in favor of the more generic ``record_property``, which
|
|
can be used by other consumers (for example ``pytest-html``) to obtain custom information about the test run.
|
|
|
|
This is just a matter of renaming the fixture as the API is the same:
|
|
|
|
.. code-block:: python
|
|
|
|
def test_foo(record_xml_property):
|
|
...
|
|
|
|
Change to:
|
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|
.. code-block:: python
|
|
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|
def test_foo(record_property):
|
|
...
|
|
|
|
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|
.. _passing command-line string to pytest.main deprecated:
|
|
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|
Passing command-line string to ``pytest.main()``
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|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
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|
.. versionremoved:: 4.0
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|
Passing a command-line string to ``pytest.main()`` is deprecated:
|
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|
.. code-block:: python
|
|
|
|
pytest.main("-v -s")
|
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|
Pass a list instead:
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|
|
|
.. code-block:: python
|
|
|
|
pytest.main(["-v", "-s"])
|
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|
|
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By passing a string, users expect that pytest will interpret that command-line using the shell rules they are working
|
|
on (for example ``bash`` or ``Powershell``), but this is very hard/impossible to do in a portable way.
|
|
|
|
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|
.. _calling fixtures directly deprecated:
|
|
|
|
Calling fixtures directly
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
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|
|
|
Calling a fixture function directly, as opposed to request them in a test function, is deprecated.
|
|
|
|
For example:
|
|
|
|
.. code-block:: python
|
|
|
|
@pytest.fixture
|
|
def cell():
|
|
return ...
|
|
|
|
|
|
@pytest.fixture
|
|
def full_cell():
|
|
cell = cell()
|
|
cell.make_full()
|
|
return cell
|
|
|
|
This is a great source of confusion to new users, which will often call the fixture functions and request them from test functions interchangeably, which breaks the fixture resolution model.
|
|
|
|
In those cases just request the function directly in the dependent fixture:
|
|
|
|
.. code-block:: python
|
|
|
|
@pytest.fixture
|
|
def cell():
|
|
return ...
|
|
|
|
|
|
@pytest.fixture
|
|
def full_cell(cell):
|
|
cell.make_full()
|
|
return cell
|
|
|
|
Alternatively if the fixture function is called multiple times inside a test (making it hard to apply the above pattern) or
|
|
if you would like to make minimal changes to the code, you can create a fixture which calls the original function together
|
|
with the ``name`` parameter:
|
|
|
|
.. code-block:: python
|
|
|
|
def cell():
|
|
return ...
|
|
|
|
|
|
@pytest.fixture(name="cell")
|
|
def cell_fixture():
|
|
return cell()
|
|
|
|
|
|
.. _yield tests deprecated:
|
|
|
|
``yield`` tests
|
|
~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
|
|
|
|
pytest supported ``yield``-style tests, where a test function actually ``yield`` functions and values
|
|
that are then turned into proper test methods. Example:
|
|
|
|
.. code-block:: python
|
|
|
|
def check(x, y):
|
|
assert x**x == y
|
|
|
|
|
|
def test_squared():
|
|
yield check, 2, 4
|
|
yield check, 3, 9
|
|
|
|
This would result into two actual test functions being generated.
|
|
|
|
This form of test function doesn't support fixtures properly, and users should switch to ``pytest.mark.parametrize``:
|
|
|
|
.. code-block:: python
|
|
|
|
@pytest.mark.parametrize("x, y", [(2, 4), (3, 9)])
|
|
def test_squared(x, y):
|
|
assert x**x == y
|
|
|
|
.. _internal classes accessed through node deprecated:
|
|
|
|
Internal classes accessed through ``Node``
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
|
|
|
|
Access of ``Module``, ``Function``, ``Class``, ``Instance``, ``File`` and ``Item`` through ``Node`` instances now issue
|
|
this warning:
|
|
|
|
.. code-block:: text
|
|
|
|
usage of Function.Module is deprecated, please use pytest.Module instead
|
|
|
|
Users should just ``import pytest`` and access those objects using the ``pytest`` module.
|
|
|
|
This has been documented as deprecated for years, but only now we are actually emitting deprecation warnings.
|
|
|
|
``Node.get_marker``
|
|
~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
|
|
|
|
As part of a large :ref:`marker-revamp`, ``_pytest.nodes.Node.get_marker`` is removed. See
|
|
:ref:`the documentation <update marker code>` on tips on how to update your code.
|
|
|
|
|
|
``somefunction.markname``
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
|
|
|
|
As part of a large :ref:`marker-revamp` we already deprecated using ``MarkInfo``
|
|
the only correct way to get markers of an element is via ``node.iter_markers(name)``.
|
|
|
|
|
|
.. _pytest.namespace deprecated:
|
|
|
|
``pytest_namespace``
|
|
~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. versionremoved:: 4.0
|
|
|
|
This hook is deprecated because it greatly complicates the pytest internals regarding configuration and initialization, making some
|
|
bug fixes and refactorings impossible.
|
|
|
|
Example of usage:
|
|
|
|
.. code-block:: python
|
|
|
|
class MySymbol:
|
|
...
|
|
|
|
|
|
def pytest_namespace():
|
|
return {"my_symbol": MySymbol()}
|
|
|
|
|
|
Plugin authors relying on this hook should instead require that users now import the plugin modules directly (with an appropriate public API).
|
|
|
|
As a stopgap measure, plugin authors may still inject their names into pytest's namespace, usually during ``pytest_configure``:
|
|
|
|
.. code-block:: python
|
|
|
|
import pytest
|
|
|
|
|
|
def pytest_configure():
|
|
pytest.my_symbol = MySymbol()
|