### Question:
AggregatingNotifierListener implements DelayedServiceNotifierListener { public void incrementCount() { count.incrementAndGet(); }  boolean addListener( DelayedServiceNotifierListener notifierListener ); boolean removeListener( DelayedServiceNotifierListener notifierListener ); void incrementCount(); int getCount(); @Override void onRun( LifecycleEvent event, Object serviceObject );  }### Answer:
@Test public void testIncrementCount() { assertEquals( 0, aggregatingNotifierListener.getCount() ); aggregatingNotifierListener.incrementCount(); assertEquals( 1, aggregatingNotifierListener.getCount() ); }