def __init__(self, filename=None):
        self.filename = None
        if filename:
            self.load(filename)
def test_pre_update_validate_change_cmd(self):
        expected_suggestion_dict = self.suggestion_dict

        suggestion = suggestion_registry.SuggestionAddQuestion(
            expected_suggestion_dict['suggestion_id'],
            expected_suggestion_dict['target_id'],
            expected_suggestion_dict['target_version_at_submission'],
            expected_suggestion_dict['status'], self.author_id,
            self.reviewer_id, expected_suggestion_dict['change'],
            expected_suggestion_dict['score_category'],
            expected_suggestion_dict['language_code'], False, self.fake_date)

        change = {
            'cmd': question_domain.CMD_UPDATE_QUESTION_PROPERTY,
            'property_name': question_domain.QUESTION_PROPERTY_LANGUAGE_CODE,
            'new_value': 'bn',
            'old_value': 'en'
        }
        with self.assertRaisesRegex(
            utils.ValidationError,
            'The new change cmd must be equal to '
            'create_new_fully_specified_question'
        ):
            suggestion.pre_update_validate(
                question_domain.QuestionChange(change))