Django TestCase检查ValidationError和assertRaises在抛ValidationError中

Question

我有一个模型，在该模型中，我重写了保存函数，类似于：

class MyModel(models.Model):
  number = models.PositiveIngeter()
  def save(self,*args, **kwargs)
    if self.number > 10:
      super().save(*args, **kwargs)
    else:
      raise ValidationError('msg')

我正在测试的功能就像

def test_number(self):
  myModel = MyModel(number=5)
  self.assertRaises(ValidationError,myModel.save)

the error i got is like this:
ERROR: test_number(apps.players.tests.test_models.CityDetailTestCase)

Traceback (most recent call last):
  File "/home/sagar/project/apps/players/tests/test_models.py", line 740, in test_number
    self.asserttRaises(ValidationError,mumbai.save)
  File "/home/sagar/.pyenv/versions/3.5.9/lib/python3.5/unittest/case.py", line 733, in assertRaises
    return context.handle('assertRaises', args, kwargs)
  File "/home/sagar/.pyenv/versions/3.5.9/lib/python3.5/unittest/case.py", line 178, in handle
    callable_obj(*args, **kwargs)
  File "/home/sagar/.pyenv/versions/3.5.9/lib/python3.5/contextlib.py", line 30, in inner
    return func(*args, **kwds)
  File "/home/sagar/project/apps/players/models.py", line 2452, in save
    raise ValidationError("msg")
rest_framework.exceptions.ValidationError: ['msg']

我刚到Django，不知道这是怎么回事

Answer 1

不需要调用该方法，只需将其作为参数传递：

from django.test import TestCase

class MyModelTest(TestCase):
   def test_my_model(self):
      myModel = MyModel(number=5)
      self.asserRaises(ValidationError, myModel.save)