Python 如何测试auto_now_插件django

我有django 1.11应用程序，我想为我的解决方案编写单元测试

我想测试注册日期功能

model.py：

class User(models.Model):
    first_name = models.CharField(max_length=30)
    last_name = models.CharField(max_length=30)
    registration_date = models.DateTimeField(auto_now_add=True)

    def get_registration_date(self):
        return self.registration_date

我还在模型工厂使用django boy： 工厂.py

  class UserFactory(factory.DjangoModelFactory):
        class Meta:
            model = models.User
        first_name = 'This is first name'
        last_name = 'This is last name'
        registration_date = timezone.now()

test.py

def test_get_registration_date(self):
    user = factories.UserFactory.create()
    self.assertEqual(user.get_registration_date(), timezone.now())

问题是我收到了断言错误：

AssertionError: datetime.datetime(2018, 4, 17, 9, 39, 36, 707927, tzinfo=<UTC>) != datetime.datetime(2018, 4, 17, 9, 39, 36, 708069, tzinfo=<UTC>)

AssertionError:datetime.datetime（2018,4,17,9,39,36,707927，tzinfo=）！=datetime.datetime（2018,4,17,9,39,36,708069，tzinfo=）

您可以使用：

---

你可以用包裹冷冻枪。哪个补丁程序是datetime.now（）

---

只需使用

工厂。生成后
装饰器：

class UserFactory(factory.DjangoModelFactory):
    ...
    @factory.post_generation
    def registration_date(self, create, extracted, **kwargs):
        if extracted:
            self.registration_date = extracted

为什么不给虚拟的具体时间来简化呢谢谢！也适用于auto_now字段。
from freezegun import freeze_time
...
    @freeze_time("2017-06-23 07:28:00")
    def test_get_registration_date(self):
        user = factories.UserFactory.create()
        self.assertEqual(
            datetime.strftime(user.get_registration_date(), "%Y-%m-%d %H:%M:%S")
            "2017-06-23 07:28:00"
        )

class UserFactory(factory.DjangoModelFactory):
    ...
    @factory.post_generation
    def registration_date(self, create, extracted, **kwargs):
        if extracted:
            self.registration_date = extracted