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;
- Can run unittest (or trial), nose test suites out of the box;
- Python 2.7, Python 3.4+, PyPy 2.3, Jython 2.5 (untested);
- Rich plugin architecture, with over 315+ external plugins and thriving community;
For full documentation, including installation, tutorials and PDF documents, please see https://docs.pytest.org/en/latest/.
Please use the GitHub issue tracker to submit bugs or request features.
Consult the Changelog page for fixes and enhancements of each version.
You can support pytest by obtaining a Tideflift subscription.
Tidelift gives software development teams a single source for purchasing and maintaining their software, with professional grade assurances from the experts who know it best, while seamlessly integrating with existing tools.
pytest has never been associated with a security vunerability, but in any case, to report a security vulnerability please use the Tidelift security contact. Tidelift will coordinate the fix and disclosure.
Copyright Holger Krekel and others, 2004-2019.
Distributed under the terms of the MIT license, pytest is free and open source software.
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