調試單元測試

Question

我在調試Django中的unittest代碼時遇到了一些問題。
當我運行單元測試，我有輸出

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 

，但是當我的同事運行相同的測試，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，第二堆棧跟蹤是更有效的那一個，我有。我可以更改我的設置（或安裝一些東西）來擴展我的堆棧跟蹤嗎？

編輯：
操作系統：Ubuntu的11.04
的Python 2.7.1
PDB安裝

Answer 1

我不能完全肯定他變得比你更多的信息。可能只是因爲他的設置中缺少某些模塊或其他東西而導致更多內容失敗。

你所看到的正是你應該看到的。這是一個失敗，所以它在技術上不是單元測試中的錯誤，而是代碼中的錯誤正在被測試。傳統的方法是編寫測試，看它失敗，然後編寫該功能，並觀察它通過。如果你發現自己正在調試你的測試，那麼這種做法就會挫傷練習的重點。