pytest

13 pages in this section.

What a pytest test actually verifies, why fixtures behave like a dependency injection graph rather than setup/teardown boilerplate, and how collection, parametrization, and plugins fit together beneath any single feature page.

Explainer Python Pytest Fixtures

pytest Setup

Set up pytest for Python projects. Learn how to configure test discovery, organize tests, and use pyproject.toml for pytest options.

Python Pytest Setup Testing

Assertions & Test Structure

Learn to structure pytest tests using arrange-act-assert and plain assert statements for clear, readable, and easily debuggable Python tests.

Python Pytest Assertions Arrange Act Assert

Fixtures

Learn how pytest fixtures provide test dependencies like database connections and API clients using dependency injection for setup and teardown.

Python Pytest Fixtures Dependency Injection

Parametrization

Learn how to use pytest.mark.parametrize to run a single test function with multiple input/output pairs, improving test efficiency and clarity.

Python Pytest Parametrize Data Driven

Mocking & Patching

Python Pytest Mocking Unittest Mock

Testing Async Code

Python Pytest Asyncio Pytest Asyncio

Coverage & Reporting

Measure test coverage with pytest-cov to find untested code paths. Learn to configure thresholds, generate reports, and interpret coverage metrics.

Python Pytest Coverage Pytest Cov

Property-Based Testing

Python Pytest Hypothesis Property Based

Testing Web APIs

Learn to test FastAPI and Flask web APIs using TestClient for in-process requests, verifying routes, middleware, and error responses.

Python Pytest Fastapi Flask

tox / nox

Python Pytest Tox Nox

Testing Best Practices

Learn pytest best practices for writing fast, reliable, and maintainable tests. Design tests for isolation, speed, and clear structure.

Python Pytest Best Practices Testing

pytest Highlights Summary

A single-page roundup of every highlight bullet from the 12 pages in the pytest section, grouped by source page so you can scan all 71 takeaways without opening each article individually.

Highlights Summary Pytest

pytest

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pytest