code: def test_main_without_cmd_arguments(
      self, mock_start_cmd_client, mock_parse_known_args
  ):
      # Set up the mock to simulate missing command-line arguments
      mock_parse_known_args.return_value = (
          argparse.Namespace(host=None, port=None),
          [],
      )
  
      # Call the function under test
      main()
  
      # Assert that the mocked functions were called correctly
      mock_start_cmd_client.assert_called_once_with(
          BASE_EVADB_CONFIG["host"], BASE_EVADB_CONFIG["port"]
      )
  
file_path: evadb/test/unit_tests/test_eva_cmd_client.py
imports: import argparse
  import asyncio
  import unittest
  from mock import patch
  from evadb.evadb_cmd_client import evadb_client, main
  from evadb.evadb_config import BASE_EVADB_CONFIG
label_desc: Use image node_id 5 for calling the CMDClientTest obj's underlying member method code with example usage: obj.test_main_without_cmd_arguments(mock_start_cmd_client, mock_parse_known_args) without return types