About pytest
pytest is a testing framework for Python code. It runs test functions written with plain assert statements and shows clear details when a check fails.
What it does
You write test functions in Python files, and pytest finds and runs them. When an assert fails, it explains the values involved, so you do not need to learn special assertion helper methods. It also scales from a few unit tests to complex functional tests for applications and libraries.
Key features
- Detailed reports for failing asserts
- Automatic discovery of test files and functions
- Reusable fixtures for setup and teardown
- Runs existing unittest test suites
- Large set of external plugins
Who it's for
Python developers and teams who want simple tests that are easy to read and maintain. It suits both small scripts and larger projects.
Pricing and good to know
pytest is open source under the MIT licence. It is a command line tool that runs on your own machine or in your build system. It needs Python 3.10 or newer, or PyPy 3.
Highlights
- Plain assert statements with detailed failure output
- Finds test files and functions automatically
- Fixtures for reusable setup of test resources
- Runs existing unittest suites without changes
- Extended through many external plugins
