}

  public void testTryAcquireTimeoutNoInterruptNotExpired() {
    TimedSemaphore semaphore = TimedSemaphore.createWithDelay(20);
    semaphore.tryAcquireSuccessfully(LONG_DELAY_MS);
    assertNotInterrupted();
  }

  public void testTryAcquireTimeoutNoInterruptExpired() {
    TimedSemaphore semaphore = TimedSemaphore.createWithDelay(LONG_DELAY_MS);
    semaphore.tryAcquireUnsuccessfully(30);