[scrollsnapchanging-on-programmatic-scroll.tentative.html]
  [scrollsnapchanging fires on programmatic scrolls that changes a scroller's snap targets.]
    expected: FAIL

  [Element.onscrollsnapchanging fires on programmatic scrolls that changes a scroller's snap targets.]
    expected: FAIL

  [scrollsnapchanging should not fire since the snap target doesn't change.]
    expected: FAIL