text: from io import StringIO
  from unittest.mock import patch
  
  from vnet_manager.tests import VNetTestCase
  from vnet_manager.actions.help import display_help_for_action
  from vnet_manager.conf import settings
  
  
  class TestDisplayHelpForAction(VNetTestCase):
      def setUp(self) -> None:
          self.logger = self.set_up_patch("vnet_manager.actions.help.logger")
  
      def test_display_help_for_action_does_not_print_anything_if_unknown_action(self):
          display_help_for_action("banana")
          self.logger.warning.called_once_with("No help text available for action banana")
          self.assertFalse(self.logger.debug.called)
  
      @patch("sys.stdout", new_callable=StringIO)
      def test_display_help_for_action_prints_mapped_help_text(self, mock):
          display_help_for_action("start")
          self.assertEqual(mock.getvalue().strip(), settings.HELP_TEXT_ACTION_MAPPING["start"].strip())
  