def test_type(self):
        rset = event.ResultSet()
        with pytest.raises(NotImplementedError):
            rset.extend([])
        with pytest.raises(NotImplementedError):
            rset.extend(False)
def test_pre_update_validate_change_new_value(self):
        expected_suggestion_dict = self.suggestion_dict
        suggestion = suggestion_registry.SuggestionEditStateContent(
            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)
        new_content = state_domain.SubtitledHtml(
            'content', '<p>new suggestion html</p>').to_dict()

        suggestion.change.new_value = new_content

        change = {
            'cmd': exp_domain.CMD_EDIT_STATE_PROPERTY,
            'property_name': exp_domain.STATE_PROPERTY_CONTENT,
            'state_name': suggestion.change.state_name,
            'new_value': new_content,
            'old_value': None
        }
        with self.assertRaisesRegex(
            utils.ValidationError, 'The new html must not match the old html'
        ):
            suggestion.pre_update_validate(exp_domain.ExplorationChange(change))