def test_check_for_file(self, mock_service):
        mock_instance = mock_service.return_value
        mock_instance.exists.return_value = True
        hook = AzureFileShareHook(azure_fileshare_conn_id='azure_fileshare_extras')
        assert hook.check_for_file('share', 'directory', 'file', timeout=3)
        mock_instance.exists.assert_called_once_with('share', 'directory', 'file', timeout=3)