pytest-forked 1.6.0


pip install pytest-forked

  Latest version

Released: Feb 12, 2023

Project Links

Meta
Author: pytest-dev
Requires Python: >=3.7

Classifiers

Development Status
  • 7 - Inactive

Framework
  • Pytest

Intended Audience
  • Developers

License
  • OSI Approved :: MIT License

Operating System
  • POSIX
  • MacOS :: MacOS X

Topic
  • Software Development :: Testing
  • Software Development :: Quality Assurance
  • Utilities

Programming Language
  • Python
  • Python :: 3
  • Python :: 3.7
  • Python :: 3.8
  • Python :: 3.9
  • Python :: 3.10
  • Python :: 3.11
  • Python :: 3 :: Only

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.

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Installation

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 .

Usage examples

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.

Wheel compatibility matrix

Platform Python 3
any

Files in release

Extras: None
Dependencies:
py
pytest (>=3.10)