* Second round. C1 messages should be handled by handler1. C2 and C3
* messages should be handled by handler2.
*/
ioHandler.addMessageHandler(C2.class, (MessageHandler) mockHandler2
.getMock());
ioHandler.messageReceived(session, msg[3]);
ioHandler.messageReceived(session, msg[4]);
ioHandler.messageReceived(session, msg[5]);
/*
* Third round. C1 messages should be handled by handler1, C2 by