final AtomicBoolean shutdown;

    Interruptenator(Thread interruptee) {
      this(interruptee, new AtomicBoolean(false));
    }

    @SuppressWarnings("ThreadPriorityCheck") // TODO: b/175898629 - Consider onSpinWait.
    Interruptenator(Thread interruptee, AtomicBoolean shutdown) {
      super(
          () -> {
            while (!shutdown.get()) {

    final AtomicBoolean shutdown;

    Interruptenator(Thread interruptee) {
      this(interruptee, new AtomicBoolean(false));
    }

    @SuppressWarnings("ThreadPriorityCheck") // TODO: b/175898629 - Consider onSpinWait.
    Interruptenator(Thread interruptee, AtomicBoolean shutdown) {
      super(
          () -> {
            while (!shutdown.get()) {

  }

  /**
   * Sets the priority for new threads created with this ThreadFactory.
   *
   * <p><b>Warning:</b> relying on the thread scheduler is <a
   * href="http://errorprone.info/bugpattern/ThreadPriorityCheck">discouraged</a>.
   *
   * <p><b>Java 21+ users:</b> use {@link Thread.Builder.OfPlatform#priority(int)} instead.
   *
   * @param priority the priority for new Threads created with this ThreadFactory

            @Override
            protected Scheduler scheduler() {
              return new CustomScheduler() {
                @Override
                @SuppressWarnings("ThreadPriorityCheck") // doing our best to test for races
                protected Schedule getNextSchedule() throws Exception {
                  if (state() != State.STARTING) {
                    inGetNextSchedule.await();

            @Override
            protected Scheduler scheduler() {
              return new CustomScheduler() {
                @Override
                @SuppressWarnings("ThreadPriorityCheck") // doing our best to test for races
                protected Schedule getNextSchedule() throws Exception {
                  if (state() != State.STARTING) {
                    inGetNextSchedule.await();

    boolean THREAD_DAEMON = false;
    ThreadFactory backingThreadFactory =
        new ThreadFactory() {
          // We need to test that we don't override the value set by the factory.
          @SuppressWarnings("ThreadPriorityCheck")
          @Override
          public Thread newThread(Runnable r) {
            Thread thread = new Thread(r);
            thread.setName(THREAD_NAME);
            thread.setPriority(THREAD_PRIORITY);

    AtomicDouble at = new AtomicDouble(1.0);
    Thread t =
        newStartedThread(
            new CheckedRunnable() {
              @Override
              @SuppressWarnings("ThreadPriorityCheck") // doing our best to test for races
              public void realRun() {
                while (!at.compareAndSet(2.0, 3.0)) {
                  Thread.yield();
                }
              }

    boolean THREAD_DAEMON = false;
    ThreadFactory backingThreadFactory =
        new ThreadFactory() {
          // We need to test that we don't override the value set by the factory.
          @SuppressWarnings("ThreadPriorityCheck")
          @Override
          public Thread newThread(Runnable r) {
            Thread thread = new Thread(r);
            thread.setName(THREAD_NAME);
            thread.setPriority(THREAD_PRIORITY);

    }
  }

  /**
   * Delays, via Thread.sleep, for the given millisecond delay, but if the sleep is shorter than
   * specified, may re-sleep or yield until time elapses.
   */
  @SuppressWarnings("ThreadPriorityCheck") // TODO: b/175898629 - Consider onSpinWait?
  static void delay(long millis) throws InterruptedException {
    long startTime = System.nanoTime();
    long ns = millis * 1000 * 1000;
    for (; ; ) {

   * get() call. As measurements of time are prone to flakiness, it tries to assert based on ranges
   * derived from observing how much time actually passed for various operations.
   */
  @SuppressWarnings("ThreadPriorityCheck")
  @AndroidIncompatible // Thread.suspend
  public void testToString_delayedTimeout() throws Exception {
    Integer javaVersion = Ints.tryParse(JAVA_SPECIFICATION_VERSION.value());