If you want to track events which are related to each other you might use the two classes TrackingCounterMaster and TrackingCounterClient. The master contains a shared conter value. Each time one of the clients is activated it gets the current value from the master and stores it. The value inside the master is incremented at the same time. This way you can roughly check the order in which the clients were accessed. It is also possible to retrieve each counter value of a client and not only the last one.

  TrackingCounterMaster master ("master", 0);
  TrackingCounterClient client1 ("client-1", master);
  TrackingCounterClient client2 ("client-2", master);

  master.setExpected(5, 10);
  client1.setExpected(2);
  client2.setExpected(2, 8);

  client1++;
  client2++;

  master.verify();