test with adding polling interval for playback

Author: Chien Yuan Chang

sdk/contentunderstanding/azure-ai-contentunderstanding/tests/testpreparer.py

@@ -27,12 +27,14 @@ def create_client(self, endpoint: str) -> ContentUnderstandingClient:
         else:
             # Fall back to service principal or DefaultAzureCredential
             credential = self.get_credential(ContentUnderstandingClient, is_async=False)
+        polling_interval = 30 if self.is_live else 1
         return cast(
             ContentUnderstandingClient,
             self.create_client_from_credential(
                 ContentUnderstandingClient,
                 credential=credential,
                 endpoint=endpoint,
+                polling_interval=polling_interval,
             ),
         )