@Override
 public void initialize() {
   sync = new Mutex();
   assertTrue(sync.getSharedQueuedThreads().isEmpty());
   sync.acquire(1);
   assertTrue(sync.getSharedQueuedThreads().isEmpty());
 }
    public void thread3() {
      waitForTick(1);
      assertTrue(sync.getSharedQueuedThreads().isEmpty());

      waitForTick(3);
      assertTrue(sync.getSharedQueuedThreads().isEmpty());
      getThread(1).interrupt();

      waitForTick(4);
      assertTrue(sync.getSharedQueuedThreads().isEmpty());
      sync.release(1);
    }
 /** getSharedQueuedThreads does not include exclusively waiting threads */
 public void testGetSharedQueuedThreads_Exclusive() {
   final Mutex sync = new Mutex();
   assertTrue(sync.getSharedQueuedThreads().isEmpty());
   sync.acquire();
   assertTrue(sync.getSharedQueuedThreads().isEmpty());
   Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync));
   waitForQueuedThread(sync, t1);
   assertTrue(sync.getSharedQueuedThreads().isEmpty());
   Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync));
   waitForQueuedThread(sync, t2);
   assertTrue(sync.getSharedQueuedThreads().isEmpty());
   t1.interrupt();
   awaitTermination(t1);
   assertTrue(sync.getSharedQueuedThreads().isEmpty());
   sync.release();
   awaitTermination(t2);
   assertTrue(sync.getSharedQueuedThreads().isEmpty());
 }
 @Override
 public void finish() {
   assertTrue(sync.getSharedQueuedThreads().isEmpty());
 }