Integration Testing FastAPI Endpoints

Welcome to integration testing! After learning about unit tests, it's time to see how different parts of your FastAPI application work together.

• Unit tests check individual functions or components in isolation.
• Integration tests verify that multiple components of your system interact correctly. For a FastAPI app, this means testing your API endpoints, checking if they handle requests, interact with dependencies, and return expected responses.

These tests ensure your API behaves as expected when all its pieces are connected.

FastAPI provides a powerful tool called TestClient from fastapi.testclient. This client allows you to make HTTP requests to your FastAPI application without needing to run a live server.

• It simulates requests directly in memory.
• It's built on top of the popular httpx library.
• It's perfect for quickly testing your API endpoints during development.

Let's see how to set it up!