将 django.test.LiveServerTestCase 的 live_server_url 与另一个字符串连接时出现类型错误

每当我尝试构建一个基于字符串self.live_server_url，我得到了蟒蛇TypeError消息。例如，我尝试过以下字符串构造（下面的形式 1 和 2），但我遇到了相同的情况TypeError。我想要的字符串是 Live Server URL"/lists"附加。注意：实际测试确实成功创建了服务器，我可以手动访问该服务器，更具体地说，我可以手动访问我尝试以编程方式构建的确切 URL（例如'http://localhost:8081/lists').

TypeErrors 出现在这些字符串结构中。

# FORM 1
lists_live_server_url = '%s%s' % (self.live_server_url, '/lists')

# FORM 2
lists_live_server_url = '{0}{1}'.format(self.live_server_url, '/lists')

self.browser.get(lists_live_server_url)

这种形式没有 python 错误（没有任何附加到字符串），尽管我的测试失败了（正如我所期望的，因为它没有访问/lists).

self.browser.get(self.live_server_url)

这是我收到的 python 错误。

/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/bin/python3.4 /Applications/PyCharm.app/Contents/helpers/pycharm/django_test_manage.py test functional_tests.lists_tests.LiveNewVisitorTest.test_can_start_a_list_and_retrieve_it_later /Users/myusername/PycharmProjects/mysite_proj
    Testing started at 11:55 AM ...
    Creating test database for alias 'default'...
    Traceback (most recent call last):
      File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 137, in run
        self.result = application(self.environ, self.start_response)
      File "/usr/local/lib/python3.4/site-packages/django/test/testcases.py", line 1104, in __call__
        return super(FSFilesHandler, self).__call__(environ, start_response)
      File "/usr/local/lib/python3.4/site-packages/django/core/handlers/wsgi.py", line 189, in __call__
        response = self.get_response(request)
      File "/usr/local/lib/python3.4/site-packages/django/test/testcases.py", line 1087, in get_response
        return self.serve(request)
      File "/usr/local/lib/python3.4/site-packages/django/test/testcases.py", line 1099, in serve
        return serve(request, final_rel_path, document_root=self.get_base_dir())
      File "/usr/local/lib/python3.4/site-packages/django/views/static.py", line 54, in serve
        fullpath = os.path.join(document_root, newpath)
      File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/posixpath.py", line 82, in join
        path += b
    TypeError: unsupported operand type(s) for +=: 'NoneType' and 'str'

我是否在不知不觉中试图修改live_server_url，这导致了这些TypeError是？我如何以编程方式构建一串live_server_url + "/lists"?

这是我正在尝试的测试......

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from django.test import LiveServerTestCase

class LiveNewVisitorTest(LiveServerTestCase):
    def setUp(self):
        self.browser = webdriver.Chrome()
        self.browser.implicitly_wait(3)

    def tearDown(self):
        self.browser.close()

    def test_can_start_a_list_and_retrieve_it_later(self):
        #self.browser.get('http://localhost:8000/lists')
        #self.browser.get('http://www.google.com')
        #lists_live_server_url = '%s%s' % (self.live_server_url, '/lists')
        #lists_live_server_url = '{0}{1}'.format(self.live_server_url, '/lists')
        lists_live_server_url = self.live_server_url
        self.browser.get(lists_live_server_url)

        self.assertIn('To-Do', self.browser.title)
        header_text = self.browser.find_element_by_tag_name('h1').text
        self.assertIn('To-Do', header_text)

请参阅 Reddit 上的讨论具有相同的错误Traceback.

基本上，这不是任何内部问题Selenium测试，而是使用项目的静态文件配置。

从你的问题来看，我相信其中的关键路线Traceback is:

File "/usr/local/lib/python3.4/site-packages/django/views/static.py", line 54, in serve
    fullpath = os.path.join(document_root, newpath) 

此行表明失败os.path.join正在尝试内django.views.static.

Set STATIC_ROOT在你的项目中settings.py文件，你应该很好。