Tutorials for writing, running, mocking, and measuring Python tests — plus the tooling that keeps code quality high in CI. Start with pytest as your test runner, layer in mock and freezegun for deterministic tests, run across multiple Python versions with tox, and enforce quality automatically with ruff and pre-commit.
Test runners
- How To Write Unit Tests with pytest in Python
- How To Use Python tox for Multi-Environment Test Automation
Mocking dependencies
- How To Use Python unittest.mock for Mocking Dependencies
- How To Use Python freezegun for Mocking Time in Tests
- How To Use Python responses for Mocking HTTP Requests in Tests
- How To Mock API Calls in Python
Coverage & type checking
Linting & formatting
- How To Use Python Ruff for Fast Linting and Formatting
- How To Use Python pre-commit for Automated Code Quality Hooks
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