Lesson Complete!
Test Your API
What you learned
- Why manual testing breaks down as an API grows, and how automated tests catch regressions
- How to write unit tests for your custom date validator using pytest
- How to use FastAPI's TestClient to send HTTP requests to your endpoints without starting a server
- How to test every CRUD operation: create, list, filter, get, delete, and update
- How to test error cases: nonexistent resources return 404, invalid data returns 422
Next up
Your API has a test suite, but it is still missing features that production APIs need. In the next lesson, you will add middleware for request logging, make file writes atomic so data is not corrupted by crashes, and add CORS headers so a frontend can call your API.