Building APIs with FastAPI · 12-day planAll days
Day 10 of 12 30 minpytestTestClientOverrides
Write automated tests that prove your API works and keep it working. Test endpoints with TestClient and assert on status codes and JSON, cover error cases, give tests a fresh database, replace dependencies such as the current user with dependency_overrides, and run tests with pytest.
By the end of today you can
- Write test functions that call endpoints with TestClient and assert results
- Test success and failure cases, including validation errors
- Give each test a fresh, isolated database
- Replace dependencies in tests with app.dependency_overrides
- Organise and run tests with pytest
What's inside
- 4 sections
- 3 diagrams and mind maps
- 2 code examples you can run
- 5-question quiz
- 1Your first tests
- 2A fresh database and dependency overrides
- 3With pytest, for real
- 4What to test
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