python-testing

Pytest automates test execution and coverage reporting for Python projects. Run `pytest` to discover and execute all tests, then integrate coverage tools to generate detailed metrics and HTML reports across your test suite, supporting selective execution, fixtures, and parametrized tests.

Use pytest fixtures and conftest.py to organize tests with reusable setup and teardown logic. Structure tests by scope—unit, integration, or targeted subsets—and leverage parametrization and markers to manage test discovery and selective execution efficiently.

Pytest supports selective execution via flags like -k for keyword filtering, --lf for last-failed tests, and -x to stop on first failure. This lets you target specific test subsets without running your entire suite, speeding up iteration during development.

Fixtures provide reusable test dependencies and setup orchestration defined in conftest.py, eliminating duplication and improving maintainability. They handle complex initialization, teardown, and state management across unit and integration tests.

Pytest integrates seamlessly with CI/CD systems to automate test execution, coverage collection, and reporting. It produces machine-readable output and coverage metrics, enabling continuous validation of test suites across your project structure.