text: from unittest import TestCase, main
  from argparse import ArgumentParser
  
  from dataflowlauncher.parsers.cli_parsers.override_arguments_cli_parser import OverrideArgumentsParser
  
  
  class TestOverrideArgumentsParser(TestCase):
      def test_add_arguments_group(self):
          parser = ArgumentParser(prog="PROG")
          input_arg_str = "--override_arguments key1=value1 key2=value2"
          OverrideArgumentsParser().add_arguments_group(parser)
          args = parser.parse_args(input_arg_str.split())
          self.assertEqual(["key1=value1", "key2=value2"], args.override_arguments)
  
      def test_updates_params(self):
          parser = ArgumentParser(prog="PROG")
          input_arg_str = "--override_arguments key1=value1 key2=value2"
          OverrideArgumentsParser().add_arguments_group(parser)
          args = parser.parse_args(input_arg_str.split())
  
          params = {'key1':'oldvalue1', 'key2': 'oldvalue2'}
          new_params = OverrideArgumentsParser().get_updated_params_from_args(params, args)
          params.update(new_params)
  
          expected_params = {'key1':'value1', 'key2': 'value2'}
  
          self.assertEqual(params, expected_params)
  
  if __name__ == '__main__':
      main()