def test_coupon_code_not_valid(self):
        """ Coupon code should not be processed, """
        self.login()

        params = {'coupon_code': None}
        response = self.client.post(url_for('billing.coupon_code'),
                                    data=params, follow_redirects=True)

        data = json.loads(response.data)

        assert response.status_code is 422
        assert data['error'] == _('Discount code cannot be processed.')
dataset/ETHPy150Open nickjj/build-a-saas-app-with-flask/catwatch/tests/billing/test_views.py/TestBilling.test_coupon_code_not_valid/operator `==` -> `is`