human
Complete this python program:
def connectServerAndClient(test, clientFactory, serverFactory):
assistant
#Here is the Python code you requested.

    """Create a server and a client and connect the two with an
    L{IOPump}.
    @param test: the test case where the client and server will be
    used.
    @type test: L{twisted.trial.unittest.TestCase}
    @param clientFactory: The factory that creates the client object.
    @type clientFactory: L{twisted.spread.pb.PBClientFactory}
    @param serverFactory: The factory that creates the server object.
    @type serverFactory: L{twisted.spread.pb.PBServerFactory}
    @return: a 3-tuple of (client, server, pump)
    @rtype: (L{twisted.spread.pb.Broker}, L{twisted.spread.pb.Broker},
    L{IOPump})
    """
    addr = ('127.0.0.1',)
    clientBroker = clientFactory.buildProtocol(addr)
    serverBroker = serverFactory.buildProtocol(addr)
    clientTransport = StringIO()
    serverTransport = StringIO()
    clientBroker.makeConnection(protocol.FileWrapper(clientTransport))
    serverBroker.makeConnection(protocol.FileWrapper(serverTransport))
    pump = IOPump(clientBroker, serverBroker, clientTransport, serverTransport)
    def maybeDisconnect(broker):
        if (not broker.disconnected):
            broker.connectionLost(failure.Failure(main.CONNECTION_DONE))
    def disconnectClientFactory():
        clientFactory.clientConnectionLost(connector=None, reason=failure.Failure(main.CONNECTION_DONE))
    test.addCleanup(maybeDisconnect, clientBroker)
    test.addCleanup(maybeDisconnect, serverBroker)
    test.addCleanup(disconnectClientFactory)
    pump.pump()
    return (clientBroker, serverBroker, pump)