added test for testing default log file name of logging

Signed-off-by: Tanishq Chaudhary <[email protected]>

Author: Tanishq30052002

launch/test/launch/test_logging.py

@@ -105,6 +105,7 @@ def test_output_loggers_configuration(
     launch.logging.reset()
     if main_log_file_name is None:
         main_log_file_name = launch.logging.launch_config.log_file_name
+        assert main_log_file_name == 'launch.log'
     logger_name = main_log_file_name.removesuffix('.log')
     launch.logging.launch_config.log_dir = log_dir
     launch.logging.launch_config.log_file_name = main_log_file_name