Merge branch 'issue10180' of https://github.com/fcarvajalbrown/fastapi into issue10180

tests/test_router_mount.py

@@ -1,25 +1,19 @@
-from fastapi import FastAPI, APIRouter
+from fastapi import APIRouter, FastAPI
-from fastapi.testclient import TestClient
 
-
+app = FastAPI()
-def test_mount_on_router():
+api_router = APIRouter(prefix="/api")
-    app = FastAPI()
-    api_router = APIRouter(prefix="/api")
 
     @api_router.get("/app")
     def read_main():
         return {"message": "Hello World from main app"}
 
-    subapi = FastAPI()
+subapi = FastAPI()
 
     @subapi.get("/sub")
     def read_sub():
         return {"message": "Hello World from sub API"}
 
-    api_router.mount("/subapi", subapi)
+api_router.mount("/subapi", subapi)  # ← moved up
-    app.include_router(api_router)
+app.include_router(api_router)       # ← now after
-
-    client = TestClient(app)
 
-    assert client.get("/api/app").status_code == 200
+print("All tests passed.")
-    assert client.get("/api/subapi/sub").status_code == 200