Fix failing test

Victorien PLOT · Victorien PLOT · commit 7ea1226354aa · 2022-12-20T11:10:43.000+01:00
diff --git a/tests/middleware/test_middleware.py b/tests/middleware/test_middleware.py
@@ -1,8 +1,10 @@
 from starlette.middleware import Middleware
+from starlette.types import Receive, Scope, Send
 
 
 class CustomMiddleware:
-    pass
+    async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
+        return None
 
 
 def test_middleware_repr():
