if [[ "$TFCI_DOCKER_PULL_ENABLE" == 1 ]]; then
  # Simple retry logic for docker-pull errors. Sleeps if a pull fails.
  # Pulling an already-pulled container image will finish instantly, so
  # repeating the command costs nothing.
  docker pull "$TFCI_DOCKER_IMAGE" || sleep 15
  docker pull "$TFCI_DOCKER_IMAGE" || sleep 30
  docker pull "$TFCI_DOCKER_IMAGE" || sleep 60
  docker pull "$TFCI_DOCKER_IMAGE"
fi 

                }
            }
            currentProcess = null;

        }
    }

    /**
     * Monitor thread that handles process timeout and termination.
     * This thread sleeps for the specified timeout duration and terminates the process if it hasn't finished.
     */
    protected static class MonitorThread extends Thread {
        /** The process to monitor. */

    val request = Request(server.url("/"))
    val response1 = client.newCall(request).execute()
    assertThat(response1.body.string()).isEqualTo("a")

    // Give the thread pool a chance to evict.
    Thread.sleep(500)
    val response2 = client.newCall(request).execute()
    assertThat(response2.body.string()).isEqualTo("b")
    assertThat(server.takeRequest().exchangeIndex).isEqualTo(0)

      () -> {
        MILLISECONDS.sleep(DELAY_MS);
        return GOOD_CALLABLE_RESULT;
      };
  private static final Callable<String> BAD_CALLABLE =
      () -> {
        MILLISECONDS.sleep(DELAY_MS);
        throw new SampleException();
      };
  private static final Runnable GOOD_RUNNABLE =
      () -> {
        try {
          MILLISECONDS.sleep(DELAY_MS);
        } catch (InterruptedException e) {

    @Test
    public void test_startProcess_replaceExistingProcess() {
        String sessionId = "test_replace";
        // Use sleep commands that run longer so we can verify they're running
        List<String> cmdList1 = Arrays.asList("sleep", "10");
        List<String> cmdList2 = Arrays.asList("sleep", "10");
        Consumer<ProcessBuilder> pbCall = pb -> {
            pb.redirectErrorStream(true);
        };

        try {

        while (count < 1500 && !isRunning) {
            ThreadUtil.sleep(sleepTime);
            count++;
            final Map<String, Object> scheduler = getSchedulerItem(namePrefix);
            assertTrue(scheduler.containsKey("running"));
            isRunning = (Boolean) scheduler.get("running");

            // Exponential backoff: gradually increase sleep time up to 300ms
            if (count % 5 == 0 && sleepTime < 300) {

      () -> {
        MILLISECONDS.sleep(DELAY_MS);
        return GOOD_CALLABLE_RESULT;
      };
  private static final Callable<String> BAD_CALLABLE =
      () -> {
        MILLISECONDS.sleep(DELAY_MS);
        throw new SampleException();
      };
  private static final Runnable GOOD_RUNNABLE =
      () -> {
        try {
          MILLISECONDS.sleep(DELAY_MS);
        } catch (InterruptedException e) {

            if uv run smokeshow upload htmlcov; then
                echo "Smokeshow upload success!"
                break
            fi
            echo "Smokeshow upload error, sleep 1 sec and try again."
            sleep 1
          done
        env:
          SMOKESHOW_GITHUB_STATUS_DESCRIPTION: Coverage {coverage-percentage}
          SMOKESHOW_GITHUB_COVERAGE_THRESHOLD: 100
          SMOKESHOW_GITHUB_CONTEXT: coverage

  }

  private fun sleep(delayMillis: Int) {
    try {
      Thread.sleep(delayMillis.toLong())
    } catch (e: InterruptedException) {
      Thread.currentThread().interrupt()
    }
  }

  private fun interruptLater(delayMillis: Int) {
    val toInterrupt = Thread.currentThread()
    val interruptingCow =
      Thread {
        sleep(delayMillis)
        toInterrupt.interrupt()

The new [Sleep] helper function combines [time.Sleep] and [testing/synctest.Wait]....