// Racy causing flaky tests
    // assertThat(taskRunner.activeQueues()).isNotEmpty()
    assertThat(taskRunnerThreads).isNotEmpty()
    Thread.sleep(100)
    for (t in taskRunnerThreads) {
      t.interrupt()
    }
    Thread.sleep(100)
    assertThat(taskRunner.activeQueues()).isEmpty()
  }

  @Test fun connectionPreWarmingHttp1() {
    taskFaker.advanceUntil(System.nanoTime())

        CommonPoolUtil.execute(this::load);
    }

    /**
     * Wait for the next reloading.
     */
    protected void waitForNext() {
        if (reloadInterval > 0) {
            ThreadUtil.sleep(reloadInterval);
        }
    }

    /**
     * Load the configuration.
     * @return The number of loaded configurations.
     */
    public abstract int load();

    /**

      taskFaker.sleep(100.µs)
      log += "red:finishing@${taskFaker.nanoTime}"
    }
    assertThat(taskFaker.executeCallCount).isEqualTo(1)

    // Enqueueing the blue task doesn't start a thread because the red one is still starting.
    blueQueue.execute("blue task") {
      log += "blue:starting@${taskFaker.nanoTime}"
      taskFaker.sleep(100.µs)

 */
@GwtCompatible
final class Platform {

  // Use fewer steps in the ListIteratorTester in ListListIteratorTester because it's slow in prod
  // mode.
  static int listListIteratorTesterNumIterations() {
    // TODO(hhchan): It's 4 in java.  Figure out why even 3 is too slow in prod mode.
    return 2;
  }

  // Use fewer steps in the IteratorTester in CollectionIteratorTester because it's slow in prod
  // mode.

 *
 * <p>The items in {@code elementsToInsert} will be repeated if {@code steps} is larger than the
 * number of provided elements.
 *
 * @author Chris Povirk
 */
@GwtCompatible
@NullMarked
public abstract class ListIteratorTester<E extends @Nullable Object>
    extends AbstractIteratorTester<E, ListIterator<E>> {
  protected ListIteratorTester(
      int steps,
      Iterable<E> elementsToInsert,

   * java/lang/ref/FinalizationTester.java
   */
  @Throws(Exception::class)
  @JvmStatic
  fun awaitGarbageCollection() {
    Runtime.getRuntime().gc()
    Thread.sleep(100)
    System.runFinalization()
  }

  @JvmStatic
  fun assumeNetwork() {
    try {
      InetAddress.getByName("www.google.com")
    } catch (uhe: UnknownHostException) {

                if (logger.isDebugEnabled()) {
                    logger.debug("Failed to select a job by {}", id, e);
                }
                lastException = e;
                ThreadUtil.sleep(RandomUtils.nextLong(500, 5000));
            }
        }
        logger.warn("Failed to select a job by {}", id, lastException);
        return OptionalEntity.empty();
    }

        // Start indexer in separate thread
        indexUpdater.start();

        // Let it run briefly
        ThreadUtil.sleep(100);

        // Stop the indexer
        indexUpdater.setFinishCrawling(true);

        // Wait for completion with longer timeout
        indexUpdater.join(3000);

    } catch (AssertionError e) {
      return;
    }
    fail("Should have caught jdk6 bug in target iterator");
  }

  private static final int STEPS = 3;

  static class TesterThatCountsCalls extends IteratorTester<Integer> {
    TesterThatCountsCalls() {
      super(STEPS, MODIFIABLE, newArrayList(1), IteratorTester.KnownOrder.KNOWN_ORDER);
    }

    int numCallsToNewTargetIterator;
    int numCallsToVerify;

    thread.start();
    thread.awaitWaiting();
    Thread.class.getMethod("suspend").invoke(thread);
    // Sleep for enough time to add 1500 milliseconds of overwait to the get() call.
    long toWaitMillis = 3500 - NANOSECONDS.toMillis(System.nanoTime() - thread.startTime);
    Thread.sleep(toWaitMillis);
    thread.setPriority(Thread.MAX_PRIORITY);
    Thread.class.getMethod("resume").invoke(thread);
    thread.join();