doAnswer(new VerifyEnvelopes(latch, numToSendPerSubtask))
.when(channelManager).dispatchFromNetwork(Matchers.<Envelope>anyObject());
final NettyConnectionManager senderConnManager = new NettyConnectionManager(localhost, BIND_PORT, BUFFER_SIZE,
numInThreads, numOutThreads, -1, -1);
senderConnManager.start(channelManager);
NettyConnectionManager receiverConnManager = new NettyConnectionManager(localhost, BIND_PORT + 1, BUFFER_SIZE,
numInThreads, numOutThreads, -1, -1);
receiverConnManager.start(channelManager);