L11 — Tests + Docker - Confidence to ship. pytest + uvicorn + ~80MB Docker image.

Description

Lesson 11 of the FastAPI Beginners Guide. The full ship-ready pipeline: pytest fixtures, in-memory DB tests, AsyncClient for async endpoints, multi-stage Dockerfile (1GB → ~80MB), and docker-compose for the full stack. You'll learn: - ✅ pytest fixtures + in-memory SQLite (rollback isolation) - ✅ TestClient (sync) + httpx.AsyncClient (async) - ✅ `dependency_overrides` for testing - ✅ Multi-stage Dockerfile with builder + runtime stages - ✅ docker-compose: app + postgres + redis - ✅ Healthchecks, non-root users, .dockerignore ⏱ Chapters 00:00 Why tests matter 02:00 conftest.py + fixtures 05:30 TestClient pattern 08:30 AsyncClient pattern 11:30 Multi-stage Dockerfile 15:00 docker-compose stack 🔗 Next: L12 — 🏆 OOP Cart → REST API. The capstone. #FastAPI #Pytest #Docker #Python #DevOps