def test_serverProtocol(self):
        """
        The C{'SERVER_PROTOCOL'} key of the C{environ} C{dict} passed to the
        application contains the HTTP version number received in the request
        (RFC 3875, section 4.1.16).
        """
        old = self.render('GET', '1.0', [], [''])
        old.addCallback(self.environKeyEqual('SERVER_PROTOCOL', 'HTTP/1.0'))

        new = self.render('GET', '1.1', [], [''])
        new.addCallback(self.environKeyEqual('SERVER_PROTOCOL', 'HTTP/1.1'))

        return gatherResults([old, new])

        The C{'SERVER_PROTOCOL'} key of the C{environ} C{dict} passed to the
        application contains the HTTP version number received in the request
        (RFC 3875, section 4.1.16).
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/test/test_wsgi.py