def METHOD_NAME(self):
    parsers, args = parse_args([
        'metrics', 'inspect', 'custom.googleapis.com/fake', '-p', PROJECT_ID
    ])
    self.assertEqual(args.parser, 'metrics')
    self.assertEqual(args.operation, 'inspect')
    self.assertEqual(args.project, PROJECT_ID)
    self.assertEqual(getattr(args, 'metric-type'),
                     'custom.googleapis.com/fake')