我使用的解决方案是将ref传递给滑块，将间谍传递给afterChange方法，但没有调用它。

it('should update local value on top slider move',() => {

// I use 2 sliders
const [top,main]: Array<RefObject<SliderMethods>> = [
  React.createRef(),React.createRef(),];
const indexes = { main: 0,top: 1 };

const afterChange = type => {
  return index => {
    indexes[type] = index;
  };
};

const {
  container,} = render(<Component sliderRefs={[top,main]} afterChange={afterChange} />);

top.current!.slickNext();
console.log(indexes); // it did not change
});