| <!DOCTYPE html> <!-- webkit-test-runner [ AsyncOverflowScrollingEnabled=true ] --> |
| <html> |
| <head> |
| <style> |
| body { |
| height: 3000px; |
| } |
| #wheel-handler-region { |
| width: 300px; |
| height: 1500px; |
| background-image: repeating-linear-gradient(white, silver 200px); |
| margin-top: 200px; |
| } |
| </style> |
| <script src="../../../resources/js-test-pre.js"></script> |
| <script src="../../../resources/ui-helper.js"></script> |
| <script> |
| jsTestIsAsync = true; |
| |
| let wheelEventHandlerCount = 0; |
| async function scrollTest() |
| { |
| let slowRegion = document.getElementById('wheel-handler-region') |
| slowRegion.addEventListener('wheel', (event) => { |
| ++wheelEventHandlerCount; |
| event.preventDefault(); |
| }); |
| |
| debug('Scrolling the main frame with latching'); |
| eventSender.mouseMoveTo(100, 10); // Above the slow region. |
| eventSender.monitorWheelEvents(); |
| eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'began', 'none'); |
| // 100ms has to elapse between the start of the gesture and some momentum event to trigger the bug. |
| await UIHelper.delayFor(25); |
| eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -10, 'changed', 'none'); |
| await UIHelper.delayFor(25); |
| eventSender.mouseScrollByWithWheelAndMomentumPhases(0, 0, 'ended', 'none'); |
| await UIHelper.delayFor(25); |
| eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -10, 'none', 'begin'); |
| await UIHelper.delayFor(25); |
| eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -10, 'none', 'continue'); |
| await UIHelper.delayFor(25); |
| eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -10, 'none', 'continue'); |
| await UIHelper.delayFor(25); |
| eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -10, 'none', 'continue'); |
| eventSender.mouseScrollByWithWheelAndMomentumPhases(0, 0, 'none', 'end'); |
| await UIHelper.waitForScrollCompletion(); |
| |
| shouldBe('wheelEventHandlerCount', '0'); |
| |
| finishJSTest(); |
| } |
| |
| window.addEventListener('load', () => { |
| description("Tests that a scroll that should latched to the main frame doens't get interrupted by the non-fast region"); |
| setTimeout(scrollTest, 0); |
| }, false); |
| </script> |
| </head> |
| <body> |
| <div id="wheel-handler-region"></div> |
| <div id="console"></div> |
| <script src="../../../resources/js-test-post.js"></script> |
| </body> |
| </html> |
