调试单元测试

Question

我在调试Django中的unittest代码时遇到了一些问题。
当我运行单元测试，我有输出

FAIL: test_basket (api.api_1_0.tests.basket_tests.BasketTest) 
---------------------------------------------------------------------- 
Traceback (most recent call last): 
    File "/home/dasm/apps/filmaster/reloaded/film20/api/api_1_0/tests/basket_tests.py", line 13, in test_basket 
    self.assertEquals(status, 200) 
AssertionError: 400 != 200 

，但是当我的同事运行相同的测试，他得到

2011-06-10 14:58:33,221 - WARNING:notification.models - No module named APNSWrapper - @<module>/96 
/home/michuk/djcode/filmaster-reloaded/piston/handler.py:36: UserWarning: Handler already registered for model ChannelScreenings, you may experience inconsistent results. 
    "you may experience inconsistent results." % new_cls.model.__name__) 
2011-06-10 14:58:33,844 - ERROR:film20.api.api_1_0.handlers - extra() got an unexpected keyword argument 'join' - @error_handler/93 
Traceback (most recent call last): 
    File "/home/michuk/djcode/filmaster-reloaded/piston/resource.py", line 164, in __call__ 
    result = meth(request, *args, **kwargs) 
    File "/home/michuk/djcode/filmaster-reloaded/film20/api/api_1_0/handlers.py", line 161, in wrapper 
    return view(self, request, request.username, *args, **kw) 
    File "/home/michuk/djcode/filmaster-reloaded/film20/api/api_1_0/handlers.py", line 1051, in read 
    return paginated_collection(request, BasketItem.objects.user_items(username, type).select_related('user', 'film')) 
    File "/home/michuk/djcode/filmaster-reloaded/film20/filmbasket/models.py", line 67, in user_items 
    join=['LEFT OUTER JOIN "core_recommendation" ON ("filmbasket_basketitem"."film_id" = "core_recommendation"."film_id" and "filmbasket_basketitem"."user_id" = "core_recommendation"."user_id")'], 
TypeError: extra() got an unexpected keyword argument 'join' 

Failure 
Traceback (most recent call last): 
    File "/usr/local/lib/python2.6/dist-packages/django/utils/unittest/case.py", line 339, in run 
    testMethod() 
    File "/home/michuk/djcode/filmaster-reloaded/film20/api/api_1_0/tests/basket_tests.py", line 15, in test_basket 
    self.assertEquals(status, 200) 
    File "/usr/local/lib/python2.6/dist-packages/django/utils/unittest/case.py", line 520, in assertEqual 
    assertion_func(first, second, msg=msg) 
    File "/usr/local/lib/python2.6/dist-packages/django/utils/unittest/case.py", line 513, in _baseAssertEqual 
    raise self.failureException(msg) 
AssertionError: 400 != 200 

正如你所看到的，第二堆栈跟踪是更有效的那一个，我有。我可以更改我的设置（或安装一些东西）来扩展我的堆栈跟踪吗？

编辑：
操作系统：Ubuntu的11.04
的Python 2.7.1
PDB安装

Answer 1

我不能完全肯定他变得比你更多的信息。可能只是因为他的设置中缺少某些模块或其他东西而导致更多内容失败。

你所看到的正是你应该看到的。这是一个失败，所以它在技术上不是单元测试中的错误，而是代码中的错误正在被测试。传统的方法是编写测试，看它失败，然后编写该功能，并观察它通过。如果你发现自己正在调试你的测试，那么这种做法就会挫伤练习的重点。