Add route facade test coverage for default APIRoute paths.

Exercise IntEnum status normalization and Response return-annotation inference to keep routing refactor coverage at required threshold.

Made-with: Cursor

tests/test_routing_facade_contract.py

@@ -1,4 +1,7 @@
+from enum import IntEnum
+
 import fastapi.routing as routing
+from starlette.responses import Response
 from fastapi.routing_handlers import RouteHandlerConfig
 from fastapi.routing_router import APIRouter
 from fastapi.routing_routes import APIRoute, APIWebSocketRoute
@@ -34,3 +37,22 @@ def test_routing_facade_re_exports_handler_contracts() -> None:
 
 def test_routing_ping_constant_compatibility() -> None:
     assert isinstance(routing._PING_INTERVAL, (float, int))
+
+
+class _CreatedStatus(IntEnum):
+    CREATED = 201
+
+
+def _raw_response_endpoint() -> Response:
+    return Response(content="ok")
+
+
+def test_api_route_defaults_and_intenum_status_paths() -> None:
+    route = routing.APIRoute(
+        "/raw-response",
+        _raw_response_endpoint,
+        status_code=_CreatedStatus.CREATED,
+    )
+    assert route.response_model is None
+    assert route.status_code == 201
+    assert route.methods == {"GET"}