ThreadedMessageQueue::stopCallback() test:
Thread 0 sent @VAR
Thread 1 sent @VAR
Thread 2 sent @VAR
Sent in @VAR
Messages sent: 6000
Messages received: @VAR

ThreadedMessageQueue::finishCallback test:
Thread 0 sent @VAR
Thread 1 sent @VAR
Thread 2 sent @VAR
Sent in @VAR
Messages sent: 6000
Messages received: @VAR

ThreadedMessageQueue::finishQueue() test:
Thread 0 sent @VAR
Thread 1 sent @VAR
Thread 2 sent @VAR
Sent in @VAR
Messages sent: 6000
Messages received: 6000