forked from mirrors/gecko-dev
a9df9dc7cd
Automatic update from web-platform-tests
Deflake tests in wpt/scroll-animations/css in virtual/threaded test environment
These tests were failing as screenshots were being taken while
compositor commits were still being deferred for first contentful
paint. Fixed by adding a wait on a composited time based animation.
As time based animations need to wait on a start time on the
compositor, these animations will block until compositor commits are
no longer being deferred. Filed a bug, to fix screenshot timing.
Verified the fix with 100 runs of the tests. Flakes are very
reproducible without the fix.
Bug: 1279648, 1378671, 1357917
Change-Id: Ib99df7822551deb4fa403e92c22f66807b98774b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3982699
Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org>
Commit-Queue: Kevin Ellis <kevers@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1064279}
--
wpt-commits: 6d3259cdf2f99c9abdc3594a2378b0356b1f2601
wpt-pr: 36673
67 lines
1.7 KiB
HTML
67 lines
1.7 KiB
HTML
<!DOCTYPE html>
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<html class="reftest-wait">
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<title>The default scroll() timeline when the frame size changed</title>
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<link rel="help" href="https://drafts.csswg.org/scroll-animations-1/#scroll-notation">
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<link rel="help" href="https://drafts.csswg.org/css-animations-2/#animation-timeline">
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<meta name="assert" content="CSS animation correctly updates values when using
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the default scroll() timeline and update the
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frame size">
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<link rel="match" href="scroll-timeline-frame-size-changed-ref.html">
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<style>
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@keyframes update {
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from { transform: translateY(0px); }
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to { transform: translateY(200px); }
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}
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html {
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min-height: 100%;
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padding-bottom: 100px;
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}
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#box {
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width: 100px;
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height: 100px;
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background-color: green;
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animation: update 1s linear;
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animation-timeline: scroll();
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}
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#covered {
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width: 100px;
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height: 100px;
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background-color: red;
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}
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* {
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margin-top: 0px;
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margin-bottom: 0px;
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}
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</style>
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<div id="box"></div>
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<div id="covered"></div>
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<script src="/web-animations/testcommon.js"></script>
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<script>
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document.documentElement.addEventListener('TestRendered', async () => {
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runTest();
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}, { once: true });
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async function runTest() {
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const scroller = document.scrollingElement;
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await waitForCompositorReady();
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// Move the scroller to the 25% point.
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const maxScroll = scroller.scrollHeight - scroller.clientHeight;
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scroller.scrollTop = 0.25 * maxScroll;
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await waitForNextFrame();
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// Update scroll range to make the current position become 50% point.
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scroller.style.paddingBottom = "50px";
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await waitForNextFrame();
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document.documentElement.classList.remove("reftest-wait");
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}
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</script>
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