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) == 5To 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.
Features
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 3.5+ and PyPy3;
Rich plugin architecture, with over 315+ external plugins and thriving community;
Documentation
For full documentation, including installation, tutorials and PDF documents, please see https://docs.pytest.org/en/latest/.
Bugs/Requests
Please use the GitHub issue tracker to submit bugs or request features.
Changelog
Consult the Changelog page for fixes and enhancements of each version.
Support pytest
You can support pytest by obtaining a Tidelift 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.
Security
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.
License
Copyright Holger Krekel and others, 2004-2019.
Distributed under the terms of the MIT license, pytest is free and open source software.
7 maintainers
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