class OrderItemTest(TestCase): def setUp(self): self.product = Product(product_name="Arduino", product_image="", product_prices=750, product_overview="aeqweq") self.order = Order(first_name='N', last_name='Zh', email='*****@*****.**', address='S', city='Bishkek') self.order_item = OrderItem(order=self.order, product=self.product, price=100, count=10) def test_get_cost(self): self.assertEqual(self.order_item.get_cost(), 1000)