如何在Django单元测试中正确使用assertRaises？

这个问题非常简单：我不能在Django 1.5单元测试中使用self.assertRaises。如何在Django单元测试中正确使用assertRaises？

我真的想验证，当您尝试从不存在的数据库中删除提供程序时，会引发LookupError。

正如你所看到的，我有一个ProviderDAO类，我定义了如何删除提供者。然后，我只需在单元测试类ProviderManagerTests中调用此方法delete_provider（）。我已经概述了代码中的所有可能性，并且在这一点上我已经来到这里寻求答案（我已经阅读了相关问题中的建议，但是没有什么可以做到这一点）我正在使用python 2.7.5 谢谢！

class ProviderManager(models.Manager): 
    def delete_provider(self, provider_id): 
     matching_providers = Provider.objects.filter(providerId=provider_id) 
     print 'delete provider method matching providers %s ' % matching_providers 
     print 'delete provider method matching providers %s ' % matching_providers.count() 
     if matching_providers.count() > 0: 
      matching_providers.delete() 
     elif matching_providers.count() == 0: 
      raise LookupError('No deletion; no providers matching this id') 

class ProviderManagerTests(TestCase): 
    def test_delete_nonexistent_provider(self): 
     provider_manager = ProviderManager() 
     someRoles = Role(name='boss') 
     someRoles.save() 
     someSpecialties = Specialty(name='senior care') 
     someSpecialties.save() 
     provider_manager.delete_provider('398236503462063') 
     #self.assertIsNone(provider,'provider should be none') 
     #self.assertTrue(Provider.objects.filter(providerId='123456') == 0) 
     ###self.assertRaises(LookupError,provider_manager.delete_provider, providerId='398236503462063') 
     #self.assertRaises(LookupError,provider_manager.delete_provider, provider_id='398236503462063') 
     #self.assertRaises(LookupError,lambda: provider_manager.delete_provider,provider_id='234234234') 
     #self.assertRaises(LookupError,lambda: provider_manager.delete_provider(provider_id='234234234')) 
     # with self.assertRaises(LookupError): 
     #  provider_manager.delete_provider(provider_id='398236503462063') 

     with self.assertRaises(LookupError): 
      provider_manager.delete_provider('398236503462063')

和堆栈跟踪：

====================================================================== 
ERROR: test_delete_nonexistent_provider (edu.tests.ProviderTests) 
---------------------------------------------------------------------- 
Traceback (most recent call last): 
    File "/Users/tests.py", line 68, in test_delete_nonexistent_provider 
    provider_manager.delete_provider('398236503462063') 
    File "/Users/models.py", line 92, in delete_provider 
    raise LookupError('No deletion; no providers matching this id') 
LookupError: No deletion; no providers matching this id 

---------------------------------------------------------------------- 
Ran 14 tests in 0.306s 

FAILED (errors=1)

来源

2013-07-03 user798719

您有另一个'provider_manager.delete_provider（ '398236503462063'）'你不在'with self.assertRaises（..）'块内的代码。 – falsetru

好吧，我感觉很愚蠢。谢谢！！！！ – user798719

顺便说一句，你可以写这样的：

self.assertRaises(LookupError, provider_manager.delete_provider, '398236503462063')

来源

2013-07-29 09:55:00 vinyll

如何在Django单元测试中正确使用assertRaises？

回答

相关问题