[英]AttributeError: can't set attribute
我正在做一個傳統的django項目,在那里某個地方定義了一個類,如下所示;
from django.http import HttpResponse
class Response(HttpResponse):
def __init__(self, template='', calling_context='' status=None):
self.template = template
self.calling_context = calling_context
HttpResponse.__init__(self, get_template(template).render(calling_context), status)
此類在視圖中使用如下
def some_view(request):
#do some stuff
return Response('some_template.html', RequestContext(request, {'some keys': 'some values'}))
此類的創建主要是為了使他們可以在單元測試中使用它來執行斷言。即,他們不是使用django.test.Client來測試視圖,而是創建了一個模擬請求並將其傳遞給view為(調用視圖)在以下測試中
def test_for_some_view(self):
mock_request = create_a_mock_request()
#call the view, as a function
response = some_view(mock_request) #returns an instance of the response class above
self.assertEquals('some_template.html', response.template)
self.assertEquals({}, response.context)
問題是在整個測試套件的中途(相當大的測試套件),執行測試時某些測試開始崩潰
return Response('some_template.html', RequestContext(request, {'some keys': 'some values'}))
並且堆棧跟蹤是
self.template = template
AttributeError: can't set attribute
完整的堆棧跟蹤看起來像
======================================================================
ERROR: test_should_list_all_users_for_that_specific_sales_office
----------------------------------------------------------------------
Traceback (most recent call last):
File "/Users/austiine/Projects/mped/console/metrics/tests/unit/views/sales_office_views_test.py", line 106, in test_should_list_all_users_for_that_specific_sales_office
response = show(request, sales_office_id=sales_office.id)
File "/Users/austiine/Projects/mped/console/metrics/views/sales_office_views.py", line 63, in show
"sales_office_users": sales_office_users}))
File "/Users/austiine/Projects/mped/console/metrics/utils/response.py", line 9, in __init__
self.template = template
AttributeError: can't set attribute
實際的失敗測試是
def test_should_list_all_users_for_that_specific_sales_office(self):
user_company = CompanyFactory.create()
request = self.mock_request(user_company)
#some other stuff
#calling the view
response = show(request, sales_office_id=sales_office.id)
self.assertIn(user, response.calling_context["sales_office_users"])
self.assertNotIn(user2, response.calling_context["sales_office_users"])
顯示視圖的代碼
def show(request, sales_office_id):
user = request.user
sales_office = []
sales_office_users = []
associated_market_names = []
try:
sales_office = SalesOffice.objects.get(id=sales_office_id)
sales_office_users = User.objects.filter(userprofile__sales_office=sales_office)
associated_market_names = Market.objects.filter(id__in= (sales_office.associated_markets.all())).values_list("name", flat=True)
if user.groups.all()[0].name == UserProfile.COMPANY_AO:
associated_market_names = [market.name for market in sales_office.get_sales_office_user_specific_markets(user)]
except:
pass
return Response("sales_office/show.html", RequestContext(request, {'keys': 'values'}))
看來您沒有在Response
類中使用self.template
。 嘗試這樣:
class Response(HttpResponse):
def __init__(self, template='', calling_context='' status=None):
HttpResponse.__init__(self, get_template(template).render(calling_context), status)
我看了一下django源代碼,我不知道template
或templates
屬性來自HttpResponse
。 但是我可以建議您更改測試方法並遷移到模擬框架。 您可以像這樣重寫測試:
@patch("qualified_path_of_response_module.response.Response", spec=Response)
def test_should_list_all_users_for_that_specific_sales_office(self,mock_resp):
user_company = CompanyFactory.create()
request = self.mock_request(user_company)
#some other stuff
#calling the view
response = show(request, sales_office_id=sales_office.id)
self.assertTrue(mock_resp.called)
context = mock_resp.call_args[0][2]
self.assertIn(user, context["sales_office_users"])
self.assertNotIn(user2, context["sales_office_users"])
@patch
裝飾器將您的Response()
類替換為MagicMock()
並將其作為mock_resp
變量傳遞給您的測試方法。 您還可以使用patch
被作為上下文管理with
結構,但裝飾是更清潔的方式來做到這一點。 我不知道Response
是否只是一個測試的存根類,但是在那種情況下,您可以直接修補HttpResponce
,但這取決於您的代碼。
您可以在此處找到有關call_args
詳細信息。 也許您需要使用spec
屬性,因為django進行了一些類型檢查...但是嘗試使用和不使用它(我不是django專家)。 探索mock
框架:它將為您提供許多強大的工具來進行簡單的測試。
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