def test_channel_request_no_messages(self):
    environ = _build_poll_environ('id')
    expected_headers = {
        'Cache-Control': 'no-cache',
        'Content-Length': '0',
    }
    self.assertResponse('200 OK', expected_headers, '', channel.application,
                        environ)
Test a channel request with no pending messages.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/tools/devappserver2/channel_test.py/DevAppserverChannelTest.test_channel_request_no_messages