pytest: simple powerful testing with Python
The pytest framework makes it easy to write small tests, yet scales to support complex functional testing for applications and libraries.
An example of a simple test:
# content of test_sample.py def inc(x): return x + 1 def test_answer(): assert inc(3) == 5
To execute it:
$ pytest ============================= test session starts ============================= collected 1 items test_sample.py F ================================== FAILURES =================================== _________________________________ test_answer _________________________________ def test_answer(): > assert inc(3) == 5 E assert 4 == 5 E + where 4 = inc(3) test_sample.py:5: AssertionError ========================== 1 failed in 0.04 seconds ===========================
Due to pytest’s detailed assertion introspection, only plain assert statements are used. See getting-started for more examples.
Detailed info on failing assert statements (no need to remember self.assert* names);
Auto-discovery of test modules and functions;
Modular fixtures for managing small or parametrized long-lived test resources;
Python 3.5+ and PyPy3;
Rich plugin architecture, with over 850+ external plugins and thriving community;
For full documentation, including installation, tutorials and PDF documents, please see https://docs.pytest.org/en/stable/.
Please use the GitHub issue tracker to submit bugs or request features.
Consult the Changelog page for fixes and enhancements of each version.
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It is the platform of choice for individuals and companies that want to make one-time or monthly donations directly to the project.
See more details in the pytest collective.
pytest for enterprise
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Copyright Holger Krekel and others, 2004-2020.
Distributed under the terms of the MIT license, pytest is free and open source software.
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