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.. warning::
this is a extraction of the xdist --forked module,
future maintenance beyond the bare minimum is not planned until a new maintainer is found.
This plugin does not work on Windows because there's no fork
support.
--forked
: run each test in a forked
subprocess to survive SEGFAULTS
or otherwise dying processes.|python| |version| |ci| |pre-commit| |black|
.. |version| image:: http://img.shields.io/pypi/v/pytest-forked.svg :target: https://pypi.python.org/pypi/pytest-forked
.. |ci| image:: https://github.com/pytest-dev/pytest-forked/workflows/build/badge.svg :target: https://github.com/pytest-dev/pytest-forked/actions
.. |python| image:: https://img.shields.io/pypi/pyversions/pytest-forked.svg :target: https://pypi.python.org/pypi/pytest-forked/
.. |black| image:: https://img.shields.io/badge/code%20style-black-000000.svg :target: https://github.com/ambv/black
.. |pre-commit| image:: https://results.pre-commit.ci/badge/github/pytest-dev/pytest-forked/master.svg :target: https://results.pre-commit.ci/latest/github/pytest-dev/pytest-forked/master
Install the plugin with::
pip install pytest-forked
or use the package in develope/in-place mode with
a checkout of the pytest-forked repository
_ ::
pip install -e .
If you have tests involving C or C++ libraries you might have to deal with tests crashing the process. For this case you may use the boxing options::
pytest --forked
which will run each test in a subprocess and will report if a test crashed the process. You can also combine this option with running multiple processes via pytest-xdist to speed up the test run and use your CPU cores::
pytest -n3 --forked
this would run 3 testing subprocesses in parallel which each create new forked subprocesses for each test.
You can also fork for individual tests::
@pytest.mark.forked
def test_with_leaky_state():
run_some_monkey_patches()
This test will be unconditionally boxed, regardless of CLI flag.
.. _pytest-forked repository
: https://github.com/pytest-dev/pytest-forked
FAQs
run tests in isolated forked subprocesses
We found that pytest-forked demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 3 open source maintainers collaborating on the project.
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