pytest in AI answers

Pytest is a Python testing framework that makes it easy to write small, readable tests and can scale to support complex functional testing for applications and libraries. It provides detailed assertion introspection, auto-discovery of test modules and functions, modular fixtures for resources, parametrization, and a rich plugin ecosystem with 1300+ external plugins, plus compatibility with unittest-based test suites. Pytest is open-source with extensive documentation and community support, and offers enterprise options through services like Tidelift and fundraising via Open Collective.