Testing Your Microservices
Unit testing is essential for microservices to ensure each component works as expected. FastAPI is compatible with the standard unittest framework and other popular testing tools like pytest. Here’s a simple test case using pytest:
Install pytest
pip install pytest
Create a test file in the tests directory
from fastapi.testclient import TestClient
from app.main import app
client = TestClient(app)
def test_read_root():
response = client.get("/")
assert response.status_code == 200
assert response.json() == {"message": "Welcome to FastAPI microservice"}
def test_read_item():
response = client.get("/items/1")
assert response.status_code == 200
assert response.json() == {"item_id": 1, "q": None}
Run your tests
pytest
Conclusion
This guide covers the basics of creating and running microservices with FastAPI. Each microservice can be developed, tested, and deployed independently. You can expand this setup by adding more features, authentication, and inter-service communication as needed.
How to Create Microservices with FastAPI
Creating microservices with FastAPI involves setting up small, independent services that can communicate with each other, usually over HTTP. FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.7+ based on standard Python type hints. Here’s a step-by-step guide to creating microservices with FastAPI: