Pytest Testing Guidance for writing effective tests with pytest. Core Concepts Fixtures Reusable test setup/teardown. Use for cleanup. Scopes: | Scope | Runs | Use Case | |-------|------|----------| | | Each test | Default, isolated | | | Once per class | Shared state in class | | | Once per file | Expensive setup | | | Once total | DB connections, servers | Key concept : makes fixtures available to all tests in directory. --- Parametrize Test multiple inputs without repeating code. Key concept : Generates separate test for each parameter set - failures are isolated. Use for: - Custom test ID…