evaluate labels after path is set

starlette_exporter/middleware.py

@@ -407,15 +407,6 @@ async def wrapped_send(message: Message) -> None:
             else:
                 status_code = 500
 
-        labels = [
-                method,
-                path,
-                status_code,
-                self.app_name,
-                *request_labels,
-                *response_labels,
-            ]
-
         if self.filter_unhandled_paths or self.group_paths:
             grouped_path: Optional[str] = None
 
@@ -438,6 +429,15 @@ async def wrapped_send(message: Message) -> None:
             if self.group_paths and grouped_path is not None:
                 path = grouped_path
 
+        labels = [
+                method,
+                path,
+                status_code,
+                self.app_name,
+                *request_labels,
+                *response_labels,
+            ]
+
         # optional extra arguments to be passed as kwargs to observations
         # note: only used for histogram observations and counters to support exemplars
         extra = {}

tests/test_middleware.py

@@ -303,7 +303,7 @@ def test_mounted_path_404(self, testapp):
 
     def test_mounted_path_404_filter(self, testapp):
         """test an unhandled path from mounted base path can be excluded from metrics"""
-        client = TestClient(testapp(filter_unhandled_paths=True))
+        client = TestClient(testapp())
         client.get("/mounted/404")
         metrics = client.get("/metrics").content.decode()