Python 将django.test.LiveServerTestCase的live\u服务器\u url与另一个字符串连接时出现TypeError

每当我尝试基于self.live_server_url构造字符串时，就会收到python类型错误消息。例如，我尝试了下面的字符串构造表单1和表单2，但我遇到了相同的类型错误。我想要的字符串是附加了/列表的实时服务器URL。注意：实际测试确实成功创建了一个服务器，我可以手动访问服务器，更具体地说，我可以手动访问我试图以编程方式构建的确切URL，例如'http://localhost:8081/lists"

这些字符串结构会出现类型错误

# 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)

这个表单没有任何附加到字符串中的python错误，尽管我的测试失败了，因为它没有访问/list

这是我得到的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，这会导致这些类型错误？如何以编程方式构建一个live_server_url+/列表字符串

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)

具有相同的错误回溯功能

基本上，这不是Selenium测试中的任何问题，而是项目的静态文件配置的问题

从你的问题来看，我认为回溯的关键是：

此行表示正在django.views.static中尝试不成功的os.path.join

---

在项目的settings.py文件中设置STATIC_ROOT，您应该会做得很好。

改用StaticLiveServerTestCase可能会有所帮助

请发布实际的测试列表好吗？不是整个测试模块f课程，但至少有一个设置，设置类（如果存在）和失败的测试方法？奇怪的是，昨晚我正与这个完全相同的错误作斗争，但当我试图拿出一个可复制的示例发布在StackOverflow上时，我无法复制这个类型错误。你找到根本原因了吗？已经核实了！好的，先生。谢谢。最奇怪的是，我想，就像你一样，我把self.live\u server\u url和各种url模式连接在一起时出了问题……大家好，欢迎来到Stack Overflow！虽然你的答案可能对这个问题的未来读者是正确的或有用的，但你应该添加更多的细节，以使你的答案更清楚。

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)

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