| <!DOCTYPE html> |
| <script src='../../../resources/gesture-util.js'></script> |
| <script src="../../../resources/testharness.js"></script> |
| <script src="../../../resources/testharnessreport.js"></script> |
| <script> |
| let t; |
| if (window.internals && chrome && chrome.gpuBenchmarking) { |
| internals.settings.setPreferCompositingToLCDTextEnabled(true); |
| internals.settings.setScrollAnimatorEnabled(false); |
| t = async_test("Vertical scroll shouldn't latch to horizontal scroller."); |
| } |
| |
| // Helper async function to block execution for n number of rAFs. |
| async function nFrames(n) { |
| return new Promise(resolve => { |
| let remainingFrames = n; |
| let func = function() { |
| --remainingFrames; |
| if (remainingFrames === 0) |
| resolve(); |
| else { |
| requestAnimationFrame(func); |
| } |
| }; |
| |
| if (n === 0) { |
| resolve(); |
| } else { |
| requestAnimationFrame(() => { |
| func(resolve); |
| }); |
| } |
| }); |
| } |
| |
| async function runTest() { |
| if (!chrome.gpuBenchmarking) |
| return; |
| const WHEEL_SOURCE_TYPE = GestureSourceType.MOUSE_INPUT; |
| |
| // Wait a bit to ensure we don't start sending scroll gestures to the |
| // compositor before the page layers have fully propagated to the CC active |
| // tree. |
| await nFrames(2); |
| |
| // Scroll horizontally first. Ensure we scrolled the div since otherwise we |
| // may pass the test vacuously. See crbug.com/801381 for the case we're |
| // guarding against. |
| await smoothScroll(10, 50, 50, WHEEL_SOURCE_TYPE, 'right', 1000); |
| |
| // Wait a bit since the scroll gesture resolves when the ScrollEnd is sent |
| // from the browser, not when it's processed by the renderer. |
| await nFrames(2); |
| |
| t.step(() => { |
| // Approx because smoothScrollBy isn't perfectly accurate. |
| assert_approx_equals( |
| document.getElementById("scroller").scrollLeft, 10, 1, |
| "Sanity check, if this fails the test isn't in the correct state."); |
| }); |
| |
| // Now scroll vertically. The scroller shouldn't have any vertical scroll |
| // extent so the window should scroll. |
| await smoothScroll(10, 50, 50, WHEEL_SOURCE_TYPE, 'down', 1000); |
| await nFrames(2); |
| t.step(() => { |
| assert_approx_equals(window.scrollY, 10, 1); |
| }); |
| t.done(); |
| } |
| |
| addEventListener('load', runTest); |
| </script> |
| <style> |
| ::-webkit-scrollbar { |
| width: 0px; |
| height: 0px; |
| } |
| body { |
| margin: 0; |
| height: 2000px; |
| } |
| #scroller { |
| position: relative; |
| top: 0.5625px; |
| width: 200px; |
| height: 200.8125px; |
| overflow: auto; |
| } |
| #space { |
| width: 1000px; |
| background-color: coral; |
| height: 200.8125px; |
| } |
| </style> |
| <div id="scroller"> |
| <div id="space"></div> |
| </div> |
