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))
