| <!DOCTYPE html> |
| <script src="../../resources/gesture-util.js"></script> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <style> |
| |
| #scroller { |
| background-color: #ccc; |
| margin-top: 20px; |
| overflow: scroll; |
| } |
| |
| #fracheight { |
| height: 1200.3px; |
| } |
| |
| </style> |
| <div id="scroller" onmousewheel=""> |
| <div id="fracheight"></div> |
| </div> |
| |
| <script> |
| promise_test(async () => { |
| var scroller_element = document.getElementById("scroller"); |
| var scroller_center = pointInElement(scroller_element, 50, 50); |
| await wheelTick(0, 1, scroller_center); |
| await waitFor( () => { |
| return scrollY == pixelsPerTick(); |
| }); |
| |
| }, "Verify that wheel scrolls chain correctly from a fractional-height scroller to its parent."); |
| </script> |
