Django 测试在响应状态代码 404 上抛出错误

Question

我正在听关于 Django 测试的讲座，这是其中一项测试：

    def test_invalid_flight_page(self):
        max_id = Flight.objects.all().aggregate(Max("id"))["id__max"]

        c = Client()
        response = c.get(f"/flights/{max_id + 1}")
        self.assertEqual(response.status_code, 404)

当我运行 manage.py 测试时它会在这个测试中抛出一个错误，基本上是说没有匹配的航班：

Creating test database for alias 'default'...
System check identified no issues (0 silenced).
.......E..
======================================================================
ERROR: test_invalid_flight_page (flights.tests.FlightTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\sarah\Desktop\airline\flights\tests.py", line 68, in test_invalid_flight_page
    response = c.get(f"/flights/{max_id + 1}")
  File "C:\Python\Python385\lib\site-packages\django\test\client.py", line 732, in get
    response = super().get(path, data=data, secure=secure, **extra)
  File "C:\Python\Python385\lib\site-packages\django\test\client.py", line 393, in get
    return self.generic('GET', path, secure=secure, **{
  File "C:\Python\Python385\lib\site-packages\django\test\client.py", line 470, in generic
    return self.request(**r)
  File "C:\Python\Python385\lib\site-packages\django\test\client.py", line 709, in request
    self.check_exception(response)
  File "C:\Python\Python385\lib\site-packages\django\test\client.py", line 571, in check_exception
    raise exc_value
  File "C:\Python\Python385\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
    response = get_response(request)
  File "C:\Python\Python385\lib\site-packages\django\core\handlers\base.py", line 179, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\sarah\Desktop\airline\flights\views.py", line 21, in flight
    flight = Flight.objects.get(pk=flight_id)
  File "C:\Python\Python385\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "C:\Python\Python385\lib\site-packages\django\db\models\query.py", line 429, in get
    raise self.model.DoesNotExist(
flights.models.Flight.DoesNotExist: Flight matching query does not exist.

----------------------------------------------------------------------
Ran 10 tests in 0.120s

FAILED (errors=1)
Destroying test database for alias 'default'...

但这就是重点，没有具有该 ID 的航班，因此该请求的响应状态代码应等于 404。据我所知，我已经准确地从讲座中复制了代码，但讲师的测试是运行一切都好。谁能看到我可能遗漏了什么？

当我将预期的 response.status_code 更改为 200 self.assertEqual(response.status_code, 200) 时，它给了我同样的错误，所以这向我表明主要问题在于响应行？如果您还需要查看任何内容，请告诉我。

Answer 1

当查询解析为空时，您的视图 class 没有处理。在django中是这样完成的：

try:
    result = SomeModel.objects.get(pk=some_id)
except SomeModel.DoesNotExist:
    # Return 404 here

Answer 2

我遇到了同样的问题。实际上，它来自响应行或 client.get() 方法本身。就我而言，我在引号末尾添加“/”为：

response = c.get(f"/flights/{max_id + 1}/")

然后检查断言条件。现在它如我所愿地发挥作用了。

还发现：如果您将一个词而不是数字替换为无效页面，它就可以正常工作。例如：

这个可以（检测到 404 个）：

response = c.get(f"/flights/whatever")

这个不起作用（未检测到 404 并警告错误）：

response = c.get(f"flights/15")

Django 测试在响应状态代码 404 上抛出错误

Django test throwing an error on response status code 404

python

django

django-testing

django-tests