pytest: helps you write better programs¶
pytest framework makes it easy to write small, readable tests, and can
scale to support complex functional testing for applications and libraries.
pytest requires: Python 3.6, 3.7, 3.8, 3.9, or PyPy3.
PyPI package name: pytest
Documentation as PDF: download latest
A quick example¶
# 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 ============================ platform linux -- Python 3.x.y, pytest-6.x.y, py-1.x.y, pluggy-1.x.y cachedir: .pytest_cache rootdir: /home/sweet/project collected 1 item test_sample.py F [100%] ================================= FAILURES ================================= _______________________________ test_answer ________________________________ def test_answer(): > assert inc(3) == 5 E assert 4 == 5 E + where 4 = inc(3) test_sample.py:6: AssertionError ========================= short test summary info ========================== FAILED test_sample.py::test_answer - assert 4 == 5 ============================ 1 failed in 0.12s =============================
pytest’s detailed assertion introspection, only plain
assert statements are used.
See Get started for a basic introduction to using pytest.
Detailed info on failing assert statements (no need to remember
Auto-discovery of test modules and functions
Modular fixtures for managing small or parametrized long-lived test resources
Python 3.6+ and PyPy 3
Rich plugin architecture, with over 800+ external plugins and thriving community
Get started - install pytest and grasp its basics just twenty minutes
How-to guides - step-by-step guides, covering a vast range of use-cases and needs
Reference guides - includes the complete pytest API reference, lists of plugins and more
Explanation - background, discussion of key topics, answers to higher-level questions
Open Collective is an online funding platform for open and transparent communities. It provides tools to raise money and share your finances in full transparency.
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¶
Available as part of the Tidelift Subscription.
The maintainers of pytest and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source dependencies you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use.