def _ourServerOurClientTest(self, name=b'session', **kwargs):
        """
        Create a connected SSH client and server protocol pair and return a
        L{Deferred} which fires with an L{SSHTestChannel} instance connected to
        a channel on that SSH connection.
        """
        result = defer.Deferred()
        self.realm = ConchTestRealm(b'testuser')
        p = portal.Portal(self.realm)
        sshpc = ConchTestSSHChecker()
        sshpc.registerChecker(ConchTestPasswordChecker())
        sshpc.registerChecker(conchTestPublicKeyChecker())
        p.registerChecker(sshpc)
        fac = ConchTestServerFactory()
        fac.portal = p
        fac.startFactory()
        self.server = fac.buildProtocol(None)
        self.clientTransport = LoopbackRelay(self.server)
        self.client = ConchTestClient(
            lambda conn: SSHTestChannel(name, result, conn=conn, **kwargs))

        self.serverTransport = LoopbackRelay(self.client)

        self.server.makeConnection(self.serverTransport)
        self.client.makeConnection(self.clientTransport)
        return result

        Create a connected SSH client and server protocol pair and return a
        L{Deferred} which fires with an L{SSHTestChannel} instance connected to
        a channel on that SSH connection.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/conch/test/test_ssh.py