from fastapi import FastAPI from fastapi.testclient import TestClient from fastapi.websockets import WebSocket app = FastAPI() @app.get("/") async def read_main(): return {"msg": "Hello World"} @app.websocket("/ws") async def websocket(websocket: WebSocket): await websocket.accept() await websocket.send_json({"msg": "Hello WebSocket"}) await websocket.close() def test_read_main(): client = TestClient(app) response = client.get("/") assert response.status_code == 200 assert response.json() == {"msg": "Hello World"} def test_websocket(): client = TestClient(app) with client.websocket_connect("/ws") as websocket: data = websocket.receive_json() assert data == {"msg": "Hello WebSocket"}