Django rest 框架：单元测试 post 请求获取状态码 400

Question

我正在这个餐厅应用程序中做一些单元测试，当运行“manage.py 测试”命令时，API 请求取消订单 returns 代码 400 ，但在 Postman 上执行相同的请求工作正常（服务器也在我的本地计算机上运行使用“manage.py runserver”命令）。我认为这是我在单元测试中做错的事情，但我不确定。在设置中，Debug = True 和 ALLOWED_HOSTS = ['*']（但我也试过 ALLOWED_HOSTS = []）。这是代码：

tests.py

class CancelOrderAPITest(APITestCase):

    def setUp(self):
        test_product = Products.objects.create(id=1, name='testProduct', description='-test-', price=2.56)
        test_product.save()
        test_order = Order.objects.create(table=1, status='WA')
        test_order.save()
        test_order.product.add(test_product)

        self.user = User.objects.create(username='test')
        self.user.set_password('passtest')
        self.user.save()

        Payments.objects.create(value=0.0, user=self.user)
        Token.objects.create(user=self.user)

    def test_CancelWithCredentials(self):
        check_login = self.client.login(username='test', password='passtest')
        self.assertTrue(check_login)

        token = Token.objects.get_or_create(user=self.user)
        self.client.credentials(HTTP_AUTHORIZATION=f'Token {token[0].key}')

        data = {"table": 1}

        response = self.client.post(reverse('cancel-order'), data=data, content_type='application/json')
        order = Order.objects.filter(table=data['table']).order_by('date')[0]

        self.assertEqual(response.status_code, status.HTTP_200_OK)  # returning 400. Investigate further
        self.assertEqual(order.status, Order.Status.CANCELED)

views.py

class CancelOrder(APIView):
    # REST API view for waiters to cancel orders. The waiter must be an authenticated user
    permission_classes = (IsAuthenticated,)
    parser_classes = (JSONParser,)

    def post(self, request):
        data = request.data

        try:
            order = Order.objects.filter(table=data['table']).order_by('date')[0]
            order.status = Order.Status.CANCELED
            order.save()
            resp = {"status": "Order canceled!"}
        except ObjectDoesNotExist:
            resp = {"exception": "Couldn't find requested product!"}

        return Response(resp)

models.py

class Order(models.Model):

    class Status(models.TextChoices):
        WAITING = 'WA', _('Waiting')
        DELIVERED = 'DE', _('Delivered')
        PARTIAL_DELIVER = 'PD', _('Partially Delivered')
        PREPARING = 'PP', _('Preparing')
        CANCELED = 'CA', _('Canceled')
        PAID = 'PA', _('Paid')

    product = models.ManyToManyField(Products)
    table = models.IntegerField(default=1)
    status = models.CharField(max_length=100, choices=Status.choices, default=Status.WAITING)
    date = models.DateTimeField(default=datetime.datetime.now)
    payment = models.ForeignKey(Payments, on_delete=models.DO_NOTHING, default=1)

Answer 1

感谢@annonymous 的评论，我明白了。出于某种原因，单元测试在请求中使用单引号发送数据导致解析错误，即使我用双引号声明它也是如此。通过删除参数 content_type="application/json 并在请求中添加参数 format="json" 来解决。

Django rest 框架：单元测试 post 请求获取状态码 400

Django rest framework: Unit testing post request gets status code 400

python

django

unit-testing

django-rest-framework