Tests break when ActionList item prop is active

[nattydodd]

Summary

We've noticed an error in our tests of a component that is using ActionList (see screenshot). It seems to be attributed to this line of code.
It fails any time one of our ActionList items has {active: true}

Expected behavior

Tests should not fail

Actual behavior

Test fails with error scrollArea.current?.scrollTo is not a function

Steps to reproduce

1. Create a component that uses an ActionList
2. In the items prop, define one of the items as {active: true}
3. Write a test for the component, and trigger the ActionList to open
4. See error in the test: scrollArea.current?.scrollTo is not a function

Are you using React components?

None

Polaris version number

^12.23.0

Browser

N/A

Device

N/A

[nattydodd]

Update - it seems that adding the following fixes the tests:

beforeEach(() => {
    if (!('scrollTo' in Element.prototype)) {
      (Element.prototype as Element).scrollTo = () => {};
    }
  });

I did have to do quite some digging to figure that out. If its not possible to prevent this issue, maybe the test workaround could be documented somewhere so its easier for others to find :)