How to mock scrollTrigger in jest?

[Nasr Galal]

Wondering how to mock scroll trigger in jest for unit tests?

[ZachSaucier]

Hey Nasr. I'm not familiar with Jest. But assuming it works similarly to a browser you should be able to set the scroll position of the scroller and then check the values that you want to check.

 

Using ScrollTrigger's .scroll() method:

yourST.scroll(yourVal);
// do your checks

 

Using native JS methods with the default scroller:

document.documentElement.scrollTop = yourVal;
// do your checks