'Test parse arguments method for update_asset command.'

def test_parse_arguments(self):

    parsed_args = Command.parse_arguments(themes=['all'])
    self.assertItemsEqual(parsed_args[2], get_themes())
    parsed_args = Command.parse_arguments(themes=['no'])
    self.assertItemsEqual(parsed_args[2], [])
    parsed_args = Command.parse_arguments(themes=['test-theme'])
    self.assertItemsEqual(parsed_args[2], [theme for theme in get_themes() if (theme.theme_dir_name == 'test-theme')])
