def test_user_cart_has_paid_course_registration_items(self): cart = Order.get_cart_for_user(self.user) item = PaidCourseRegistration(order=cart, user=self.user) item.save() self.assertTrue( Order.user_cart_has_items(self.user, PaidCourseRegistration)) self.assertFalse(Order.user_cart_has_items(self.user, CertificateItem))