assertThat(future.get()).isEqualTo("hello");
    assertThat(recordedTimeUnit).isEqualTo(NANOSECONDS);
    assertThat(Duration.ofNanos(recordedDelay)).isEqualTo(Duration.ofMinutes(12));
  }

  public void testScheduleAtFixedRate() throws Exception {
    Runnable command = () -> {};

    ListenableScheduledFuture<?> future =
        executorService.scheduleAtFixedRate(command, Duration.ofDays(2), Duration.ofHours(4));