def METHOD_NAME(self) -> None:
    """
    Test mail client success
    :return:
    """
    status_codes = [HTTPStatus.OK, HTTPStatus.ACCEPTED]
    for status_code in status_codes:
        self.app.config['MAIL_CLIENT'] = MockMailClient(status_code=status_code)
        with self.subTest():
            with self.app.test_client() as test:
                response = test.post('/api/mail/v0/feedback', json={
                    'rating': '10', 'comment': 'test'
                })
                self.assertTrue(200 <= response.status_code <= 300)