requestInterruptIn(10);
    semaphore.tryAcquireUnsuccessfully(10, 50);
    assertInterrupted();
  }

  public void testTryAcquireTimeoutMultiInterruptNoExpireMultiPermit() {
    TimedSemaphore semaphore = TimedSemaphore.createWithDelay(100);
    repeatedlyInterruptTestThread(20, tearDownStack);
    semaphore.tryAcquireSuccessfully(10, LONG_DELAY_MS);