Django LiveServerTestCase 与 phantomjs 偶尔挂起/超时

Question

我在使用Django（1.5.5）、selenium（2.41.0）、splinter（0.6.0）和phantomjs（1.9.7）来进行实时测试。

虽然大部分测试都能正常运行，但有时候（在CircleCI上经常出现，在本地虚拟机上少一些）测试会卡住，直到CircleCI超时，或者我手动终止运行（按Ctrl-C，也就是键盘中断可以用）。

这是我基本测试类的样子：

class SplinterTestCase(LiveServerTestCase):
    @classmethod
    def setUpClass(cls):
        super(SplinterTestCase, cls).setUpClass()
        # start phantom just once per class, to speed up tests
        cls.phantom = splinter.Browser('phantomjs', load_images=False)

    @classmethod
    def tearDownClass(cls):
        cls.phantom.quit()
        super(SplinterTestCase, cls).tearDownClass()

    def login(self, *args, **kwargs):
        # perform a login using Django builtin "client", steal the session
        # cookie and inject it to phantomjs, avoiding the need to do the
        # login dance for each test
        from django.conf import settings
        cn = settings.SESSION_COOKIE_NAME

        self.django_client.login(*args, **kwargs)
        if cn in self.django_client.cookies:
            self.client.driver.add_cookie({
                'name': cn,
                'value': self.django_client.cookies[cn].value,
                'path': '/',
                'domain': 'localhost'
            })

    def setUp(self):
        # use phantom as the test client instead of Django's
        super(SplinterTestCase, self).setUp()
        self.django_client = self.client
        self.client = self.phantom

    def tearDown(self):
        # this seems to help somewhat (decreases the number of timeouts), but
        # doesn't solve it completely
        self.client.visit('about:config')
        super(SplinterTestCase, self).tearDown()

按下Ctrl-C后，我得到的堆栈跟踪信息是：

Traceback (most recent call last):
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 86, in run
    self.finish_response()
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 127, in finish_response
    self.write(data)
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 215, in write
    self._write(data)
  File "/usr/lib/python2.7/socket.py", line 324, in write
    self.flush()
  File "/usr/lib/python2.7/socket.py", line 303, in flush
    self._sock.sendall(view[write_offset:write_offset+buffer_size])
error: [Errno 104] Connection reset by peer
Traceback (most recent call last):
  File "/home/ubuntu/memo-angel/venv/local/lib/python2.7/site-packages/django/test/testcases.py", line 998, in _handle_request_noblock
    self.process_request(request, client_address)
  File "/usr/lib/python2.7/SocketServer.py", line 310, in process_request
    self.finish_request(request, client_address)
  File "/usr/lib/python2.7/SocketServer.py", line 323, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "/home/ubuntu/memo-angel/venv/local/lib/python2.7/site-packages/django/core/servers/basehttp.py", line 150, in __init__
    super(WSGIRequestHandler, self).__init__(*args, **kwargs)
  File "/usr/lib/python2.7/SocketServer.py", line 640, in __init__
    self.finish()
  File "/usr/lib/python2.7/SocketServer.py", line 693, in finish
    self.wfile.flush()
  File "/usr/lib/python2.7/socket.py", line 303, in flush
    self._sock.sendall(view[write_offset:write_offset+buffer_size])
error: [Errno 32] Broken pipe

类似的问题可能在Django与splinter和phantomjs的速度非常慢中讨论过，因为原作者也提到“它会一直卡住，直到我等得不耐烦为止”。那里的回答提到可以尝试把phantomjs的启动和停止放在类的设置和拆卸中，我在这里也这么做了，但问题并没有解决。

有没有人遇到过类似的问题，如果有，你们是怎么解决的？

django 自动化测试堆栈跟踪 selenium phantomjs livertestcase splinter circleci

Django LiveServerTestCase 与 phantomjs 偶尔挂起/超时

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