assertNull(array[0]);
  }

  @GwtIncompatible // ObjectArrays.concat(Object[], Object[], Class)
  public void testConcatEmptyEmpty() {
    String[] result = ObjectArrays.concat(new String[0], new String[0], String.class);
    assertEquals(String[].class, result.getClass());
    assertThat(result).isEmpty();
  }

  @GwtIncompatible // ObjectArrays.concat(Object[], Object[], Class)
  public void testConcatEmptyNonempty() {

   * write.
   *
   * 2. visibility of the writes to an afterDone() call triggered by cancel():
   *
   * Since these fields are non-final that means that TimeoutFuture is not being 'safely published',
   * thus a motivated caller may be able to expose the reference to another thread that would then
   * call cancel() and be unable to cancel the delegate.

			}
		}
	}
}

func (dm *DRWMutex) startContinuousLockRefresh(lockLossCallback func(), id, source string, quorum int) {
	ctx, cancel := context.WithCancel(context.Background())

	dm.m.Lock()
	dm.cancelRefresh = cancel
	dm.m.Unlock()

	go func() {
		defer cancel()

		refreshTimer := time.NewTimer(dm.refreshInterval)
		defer refreshTimer.Stop()

		for {
			select {
			case <-ctx.Done():

	timeoutCtx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
	defer cancel()

	_, err := client.Delete(timeoutCtx, key)
	etcdLogIf(ctx, err)
	return etcdErrToErr(err, client.Endpoints())
}

func readKeyEtcd(ctx context.Context, client *etcd.Client, key string) ([]byte, error) {
	timeoutCtx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
	defer cancel()
	resp, err := client.Get(timeoutCtx, key)

    Stream<String> concatenated =
        Streams.concat(Stream.of("a"), streamB, Stream.empty(), Stream.of("c", "d"));
    assertThat(concatenated).containsExactly("a", "b", "c", "d").inOrder();
    concatenated.close();
    assertThat(closeCountB.get()).isEqualTo(1);
  }

  public void testConcat_refStream_closeIsPropagated_Stream_concat() {
    // Just to demonstrate behavior of Stream::concat in the standard library

var ztunnelTestCounter atomic.Uint32

func TestZtunnelSendsPodSnapshot(t *testing.T) {
	ztunnelKeepAliveCheckInterval = time.Second / 10
	mt := monitortest.New(t)
	setupLogging()
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	fixture := connect(ctx)
	ztunClient := fixture.ztunClient
	uid := fixture.uid

	m, fds := readRequest(t, ztunClient)

  }

  private static void doTestSuccessfulAsList_resultCancelledRacingInputDone() throws Exception {
    // Simple (combined.cancel -> input.cancel -> setOneValue):
    successfulAsList(ImmutableList.of(SettableFuture.create())).cancel(true);

    /*
     * Complex (combined.cancel -> input.cancel -> other.set -> setOneValue),
     * to show that this isn't just about problems with the input future we just
     * cancelled:

    assertNull(array[0]);
  }

  @GwtIncompatible // ObjectArrays.concat(Object[], Object[], Class)
  public void testConcatEmptyEmpty() {
    String[] result = ObjectArrays.concat(new String[0], new String[0], String.class);
    assertEquals(String[].class, result.getClass());
    assertThat(result).isEmpty();
  }

  @GwtIncompatible // ObjectArrays.concat(Object[], Object[], Class)
  public void testConcatEmptyNonempty() {

    assertFailed(future, cause);
  }

  public void testCanceled() throws Exception {
    assertThat(future.cancel(false /* mayInterruptIfRunning */)).isTrue();
    assertCancelled(future, false);
  }

  public void testInterrupted() throws Exception {
    assertThat(future.cancel(true /* mayInterruptIfRunning */)).isTrue();
    assertCancelled(future, true);
  }

    assertFailed(future, cause);
  }

  public void testCanceled() throws Exception {
    assertThat(future.cancel(false /* mayInterruptIfRunning */)).isTrue();
    assertCancelled(future, false);
  }

  public void testInterrupted() throws Exception {
    assertThat(future.cancel(true /* mayInterruptIfRunning */)).isTrue();
    assertCancelled(future, true);
  }