new ThreadPoolExecutor(1, 2, 3, SECONDS, new ArrayBlockingQueue<Runnable>(1));
    assertNotNull(application.getExitingExecutorService(executor));
    assertTrue(executor.getThreadFactory().newThread(EMPTY_RUNNABLE).isDaemon());
  }

  @AndroidIncompatible // Mocking ExecutorService is forbidden there. TODO(b/218700094): Don't mock.
  public void testGetExitingExecutorService_executorDelegatesToOriginal() {

internal val UTC: TimeZone = TimeZone.getTimeZone("GMT")!!

internal fun threadFactory(
  name: String,
  daemon: Boolean,
): ThreadFactory =
  ThreadFactory { runnable ->
    Thread(runnable, name).apply {
      isDaemon = daemon
    }
  }

internal fun HttpUrl.toHostHeader(includeDefaultPort: Boolean = false): String {
  val host =
    if (":" in host) {
      "[$host]"
    } else {
      host
    }