barrier.await(1, SECONDS);
      executor.execute(barrierTask);
      // timeout means the second task wasn't even tried
      barrier.await(1, SECONDS);
    } finally {
      service.shutdown();
    }
  }

  public void testRejectedExecutionThrownWithMultipleCalls() throws Exception {
    CountDownLatch latch = new CountDownLatch(1);

    assertTrue(writeLockA.tryLock());
    assertTrue(readLockA.tryLock());
  }

  private static class LockingThread extends Thread {
    final CountDownLatch locked = new CountDownLatch(1);
    final CountDownLatch finishLatch = new CountDownLatch(1);
    final Lock lock;

    LockingThread(Lock lock) {
      this.lock = lock;
    }

    @Override
    public void run() {
      lock.lock();

    assertTrue(writeLockA.tryLock());
    assertTrue(readLockA.tryLock());
  }

  private static class LockingThread extends Thread {
    final CountDownLatch locked = new CountDownLatch(1);
    final CountDownLatch finishLatch = new CountDownLatch(1);
    final Lock lock;

    LockingThread(Lock lock) {
      this.lock = lock;
    }

    @Override
    public void run() {
      lock.lock();

 * @since 26.0
 */
@J2ktIncompatible
@GwtIncompatible
public final class ExecutionSequencer {

  private ExecutionSequencer() {}

  /** Creates a new instance. */
  public static ExecutionSequencer create() {
    return new ExecutionSequencer();
  }

  /** This reference acts as a pointer tracking the head of a linked list of ListenableFutures. */
  private final AtomicReference<ListenableFuture<@Nullable Void>> ref =

    }

    SmbFileHandleImpl openUnshared(final int flags, final int access, final int sharing, final int attrs, final int options)
            throws CIFSException {
        return openUnshared(getUncPath(), flags, access, sharing, attrs, options);
    }

    SmbFileHandleImpl openUnshared(final String uncPath, final int flags, final int access, final int sharing, final int attrs,
            final int options) throws CIFSException {

import org.mockito.Mockito;

/**
 * Tests for RateLimiter.
 *
 * @author Dimitris Andreou
 */
@NullUnmarked
public class RateLimiterTest extends TestCase {
  private static final double EPSILON = 1e-8;

  private final FakeStopwatch stopwatch = new FakeStopwatch();

  public void testSimple() {
    RateLimiter limiter = RateLimiter.create(5.0, stopwatch);
    limiter.acquire(); // R0.00, since it's the first request

import org.mockito.Mockito;

/**
 * Tests for RateLimiter.
 *
 * @author Dimitris Andreou
 */
@NullUnmarked
public class RateLimiterTest extends TestCase {
  private static final double EPSILON = 1e-8;

  private final FakeStopwatch stopwatch = new FakeStopwatch();

  public void testSimple() {
    RateLimiter limiter = RateLimiter.create(5.0, stopwatch);
    limiter.acquire(); // R0.00, since it's the first request

                final int threadId = t;
                executor.submit(() -> {
                    try {
                        byte[] data = new byte[128];
                        Arrays.fill(data, (byte) threadId);
                        digest.sign(data, 0, data.length, request, response);
                        results[threadId] = data;
                    } finally {
                        latch.countDown();

      test.getMethod("setUp").invoke(testInstance);
      test.getMethod(getName()).invoke(testInstance);
      test.getMethod("tearDown").invoke(testInstance);
    } finally {
      Thread.currentThread().setContextClassLoader(oldClassLoader);
    }
  }

  private void checkHelperVersion(ClassLoader classLoader, String expectedHelperClassName)
      throws Exception {

   * @since 14.0
   */
  public static ByteSink asByteSink(File file, FileWriteMode... modes) {
    return new FileByteSink(file, modes);
  }

  private static final class FileByteSink extends ByteSink {

    private final File file;
    private final ImmutableSet<FileWriteMode> modes;

    private FileByteSink(File file, FileWriteMode... modes) {
      this.file = checkNotNull(file);