Fixed #31407 -- Adjusted test to avoid coroutine never awaited warning.

tests/handlers/tests.py

@@ -269,9 +269,10 @@ class AsyncHandlerRequestTests(SimpleTestCase):
 
     async def test_unawaited_response(self):
         msg = (
-            "The view handlers.views.async_unawaited didn't return an "
-            "HttpResponse object. It returned an unawaited coroutine instead. "
-            "You may need to add an 'await' into your view."
+            "The view handlers.views.CoroutineClearingView.__call__ didn't"
+            " return an HttpResponse object. It returned an unawaited"
+            " coroutine instead. You may need to add an 'await'"
+            " into your view."
         )
         with self.assertRaisesMessage(ValueError, msg):
             await self.async_client.get('/unawaited/')

tests/handlers/views.py

@@ -51,6 +51,12 @@ async def async_regular(request):
     return HttpResponse(b'regular content')
 
 
-async def async_unawaited(request):
-    """Return an unawaited coroutine (common error for async views)."""
-    return asyncio.sleep(0)
+class CoroutineClearingView:
+    def __call__(self, request):
+        """Return an unawaited coroutine (common error for async views)."""
+        # Store coroutine to suppress 'unawaited' warning message
+        self._unawaited_coroutine = asyncio.sleep(0)
+        return self._unawaited_coroutine
+
+
+async_unawaited = CoroutineClearingView()