32 lines
1 KiB
HTML
32 lines
1 KiB
HTML
<!DOCTYPE html>
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<title>Layout Instability: no shifts from advancing video track</title>
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<link rel="help" href="https://wicg.github.io/layout-instability/" />
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="resources/test-adapter.js"></script>
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<script src="resources/util.js"></script>
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<video controls>
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<source src="/media/white.webm" type="video/webm">
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</video>
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<script>
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promise_test(async () => {
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const watcher = new ScoreWatcher;
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var video = document.querySelector("video");
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await new Promise(resolve => { video.oncanplay = resolve; });
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await waitForAnimationFrames(2);
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// TODO(crbug.com/1088311): There are still some shifts from creating the
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// <video>, so the score is already > 0 here. For now, just verify that
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// advancing the track does not increase it further.
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var currentScore = watcher.score;
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video.currentTime = 5;
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await waitForAnimationFrames(3);
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cls_expect(watcher, {score: currentScore});
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}, "No shifts from advancing video track.");
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</script>
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