python-testing

Topics in the source

• Python Testing
• Testing Framework
• Basic Test Structure
• Test Discovery
• Fixtures
• Fixture Scopes
• Fixture Dependencies
• Parametrization

This skill provides comprehensive Python testing patterns using pytest as the primary testing framework. Use pytest as the testing framework for its powerful features and clean syntax. pytest automatically discovers tests following these conventions: Files: test.py or test.py Functions: test Classes: Test (without init) Methods: test Fixtures provide reusable test setup and teardown: Test multiple inputs with @pytest.mark.parametrize: Use markers for test categorization and selective execution: Run specific markers: Using hypothesis for property-based testing: 1. One assertion per test (when possible) 2. Use descriptive test names - describe what's being tested 3. Arrange-Act-Assert pattern - clear test structure 4. Use fixtures for setup - avoid duplication 5. Mock external dependencies - keep tests fast and isolated 6. Test edge cases - empty inputs, None, boundaries 7. Use parametrize - test multiple scenarios efficiently 8. Keep tests independent - no shared state between tests Writing new Python tests Improving test coverage Setting up pytest infrastructure Debugging flaky tests Implementing integration tests Testing async Python code