Remove routing decorators in `middleware/test_base.py` (#1488)

* Remove routing decorators in

* Update test_base.py middleware

tests/middleware/test_base.py

@@ -4,7 +4,7 @@ from starlette.applications import Starlette
 from starlette.middleware import Middleware
 from starlette.middleware.base import BaseHTTPMiddleware
 from starlette.responses import PlainTextResponse, StreamingResponse
-from starlette.routing import Route
+from starlette.routing import Route, WebSocketRoute
 
 
 class CustomMiddleware(BaseHTTPMiddleware):
@@ -14,21 +14,14 @@ class CustomMiddleware(BaseHTTPMiddleware):
         return response
 
 
-app = Starlette()
-app.add_middleware(CustomMiddleware)
-
-
-@app.route("/")
 def homepage(request):
     return PlainTextResponse("Homepage")
 
 
-@app.route("/exc")
 def exc(request):
     raise Exception("Exc")
 
 
-@app.route("/exc-stream")
 def exc_stream(request):
     return StreamingResponse(_generate_faulty_stream())
 
@@ -38,7 +31,6 @@ def _generate_faulty_stream():
     raise Exception("Faulty Stream")
 
 
-@app.route("/no-response")
 class NoResponse:
     def __init__(self, scope, receive, send):
         pass
@@ -50,13 +42,24 @@ class NoResponse:
         pass
 
 
-@app.websocket_route("/ws")
 async def websocket_endpoint(session):
     await session.accept()
     await session.send_text("Hello, world!")
     await session.close()
 
 
+app = Starlette(
+    routes=[
+        Route("/", endpoint=homepage),
+        Route("/exc", endpoint=exc),
+        Route("/exc-stream", endpoint=exc_stream),
+        Route("/no-response", endpoint=NoResponse),
+        WebSocketRoute("/ws", endpoint=websocket_endpoint),
+    ],
+    middleware=[Middleware(CustomMiddleware)],
+)
+
+
 def test_custom_middleware(test_client_factory):
     client = test_client_factory(app)
     response = client.get("/")