pytest

12 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

Project layout, discovery, and configuration.

Python Pytest Setup Testing

Assertions & Test Structure

Arrange-act-assert and readable tests.

Python Pytest Assertions Arrange Act Assert

Fixtures

Setup/teardown, scopes, factories, and dependency injection.

Python Pytest Fixtures Dependency Injection

Parametrization

Data-driven tests and `pytest.mark.parametrize`.

Python Pytest Parametrize Data Driven

Mocking & Patching

Python Pytest Mocking Unittest Mock

Testing Async Code

Python Pytest Asyncio Pytest Asyncio

Coverage & Reporting

`pytest-cov`, thresholds, and gaps.

Python Pytest Coverage Pytest Cov

Property-Based Testing

Python Pytest Hypothesis Property Based

Testing Web APIs

`TestClient`/`httpx` against FastAPI/Flask/Django.

Python Pytest Fastapi Flask

tox / nox

Python Pytest Tox Nox

Testing Best Practices

Fast, isolated, deterministic tests.

Python Pytest Best Practices Testing

pytest

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pytest