Pytest Testing Skill Core Patterns Basic Test Fixtures Parametrize Markers Mocking Assertions Anti-Patterns | Bad | Good | Why | |-----|------|-----| | | | pytest rewrites give better output | | Setup in | | Lifecycle management | | Global state | Fixture with | Proper cleanup | | Huge test functions | Small focused tests | Easier debugging | Quick Reference | Task | Command | |------|---------| | Run all | | | Run file | | | Run specific | | | By marker | | | By keyword | | | Verbose | | | Stop first fail | | | Last failed | | | Coverage | | | Parallel | (pytest-xdist) | pyproject.toml Deep…