Add print to confirm that the failed_test_stories.yml has been saved (#…

…6793)

* Add print to confirm that the failed_test_stories.yml has been saved (#3998)

Co-authored-by: Henrike100 <henrikem100@gmail.com>

* Change the way to show the file name

* files formatted with black

* add changelog

* Update test core

* Formatted with black

* Update print

Co-authored-by: mbslet <lmbs.geo@gmail.com>

changelog/3998.improvement.md

@@ -0,0 +1 @@
+Added a message showing the location where the failed stories file was saved.

rasa/cli/test.py

@@ -17,6 +17,7 @@
     DEFAULT_DATA_PATH,
     DEFAULT_RESULTS_PATH,
 )
+from rasa.core.test import FAILED_STORIES_FILE
 import rasa.shared.utils.validation as validation_utils
 import rasa.cli.utils
 
@@ -109,6 +110,10 @@ def run_core_test(args: argparse.Namespace) -> None:
     else:
         test_core_models(args.model, stories, output)
 
+    rasa.shared.utils.cli.print_info(
+        f"Failed stories written to '{os.path.join(output, FAILED_STORIES_FILE)}'"
+    )
+
 
 def run_nlu_test(args: argparse.Namespace) -> None:
     """Run NLU tests."""