https://github.com/facebook/react/blob/30b47103d4354d9187dc0f1fb804855a5208ca9f/packages/scheduler/src/Scheduler.js#L180-L185
delay: 100,
        },
      );
      
      expect(Scheduler).toFlushAndYield([]);
      
      Scheduler.unstable_advanceTime(200);
      
      expect(Scheduler).toFlushAndYieldThrough(['A']);
      expect(Scheduler).toFlushAndYield(['B']);
      
      Scheduler.unstable_advanceTime(200);
      expect(Scheduler).toFlushAndYield(['C', 'D']);
    });
    it('interleaves normal tasks and delayed tasks', () => {
      
      
      scheduleCallback(
        UserBlockingPriority,
        () => Scheduler.unstable_yieldValue('Timer 2'),
        {delay: 300},
      );
      scheduleCallback(
        UserBlockingPriority,
        () => Scheduler.unstable_yieldValue('Timer 1'),
        {delay: 100},
      );
      
      scheduleCallback(NormalPriority, () => {
        Scheduler.unstable_yieldValue('A');