What problem does it solve?
pytest provides a powerful, flexible testing framework for Python that makes writing, organizing, and running tests easier through fixtures, parametrization, and a rich plugin ecosystem. It supports integration with FastAPI, Django, Flask, and asynchronous code, enabling teams to go from failing tests to reliable software faster.
Core Features & Use Cases
- Fixture system for dependency injection and reusable setup
- Parametrization and markers for data-driven and categorized tests
- Wide plugin ecosystem (cov, asyncio, mock, Django, etc.) for extended capabilities
- Async support, test discovery, and rich assertion introspection
- Seamless integration with FastAPI, Django, and Flask projects
- Use cases include unit tests, integration tests, API testing, and test-driven development workflows
Quick Start
Install pytest and common plugins, create test_*.py files, use fixtures via @pytest.fixture and parameterization via @pytest.mark.parametrize, then run pytest -v to execute.