def test_pre_accept_validate_state_name(self):
        self.save_new_default_exploration('exp1', self.author_id)
        expected_suggestion_dict = self.suggestion_dict
        suggestion = suggestion_registry.SuggestionTranslateContent(
            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)

        exp_services.update_exploration(
            self.author_id, 'exp1', [
                exp_domain.ExplorationChange({
                    'cmd': exp_domain.CMD_ADD_STATE,
                    'state_name': 'State A',
                }),
                exp_domain.ExplorationChange({
                    'cmd': exp_domain.CMD_EDIT_STATE_PROPERTY,
                    'property_name': exp_domain.STATE_PROPERTY_CONTENT,
                    'new_value': {
                        'content_id': 'content',
                        'html': '<p>This is a content.</p>'
                    },
                    'state_name': 'State A',
                })
            ], 'Added state')
        suggestion.change.state_name = 'State A'

        suggestion.pre_accept_validate()

        suggestion.change.state_name = 'invalid_state_name'
        with self.assertRaisesRegex(
            utils.ValidationError,
            'Expected invalid_state_name to be a valid state name'
        ):
            suggestion.pre_accept_validate()