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Automatic update from web-platform-tests Convert LayoutShiftTrackerPointerdownTest to WPT. The original tests are left intact, as they also verify the value of LayoutShiftTracker::Score() which is not directly available to WPT. Bug: 984109 Change-Id: I25d8fd48ac86ebbfc742d6dfe10e7097497b31d6 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1937579 Commit-Queue: Steve Kobes <skobes@chromium.org> Reviewed-by: Nicolás Peña Moreno <npm@chromium.org> Cr-Commit-Position: refs/heads/master@{#719739} -- wpt-commits: eab5fd860eaf5def6180a7de2b0186d6ab78d1c5 wpt-pr: 20464
62 lines
1.8 KiB
HTML
62 lines
1.8 KiB
HTML
<!DOCTYPE html>
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<title>Layout Instability: shift in pointerdown becoming scroll</title>
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<link rel="help" href="https://wicg.github.io/layout-instability/" />
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<style>
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body { margin: 0; height: 2000px; }
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#box {
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left: 0px;
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top: 0px;
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width: 400px;
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height: 500px;
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background: yellow;
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position: relative;
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}
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</style>
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<div id="box"></div>
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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/testdriver.js"></script>
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<script src="/resources/testdriver-actions.js"></script>
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<script src="/resources/testdriver-vendor.js"></script>
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<script src="resources/util.js"></script>
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<script>
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const box = document.querySelector("#box");
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box.addEventListener("pointerdown", (e) => {
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// Generate a layout shift before we know what type of input this pointer
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// event sequence will become.
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box.style.top = "100px";
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e.preventDefault();
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});
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generateScrollSequence = () => new test_driver.Actions()
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.addPointer("tp1", "touch")
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.pointerMove(0, 100, {sourceName: "tp1"})
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.pointerDown({sourceName: "tp1"})
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.pointerMove(0, 0, {sourceName: "tp1"})
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.pause(100)
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.pointerUp({sourceName: "tp1"})
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.pause(100);
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promise_test(async () => {
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const watcher = new ScoreWatcher;
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// Wait for the initial render to complete.
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await waitForAnimationFrames(2);
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// Send pointer events for a touch scroll.
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await generateScrollSequence().send();
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// The box is 400 x 500 and moves by 100px.
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const expectedScore = computeExpectedScore(400 * (500 + 100), 100);
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// Both scores should increase (scroll doesn't count as input for the purpose
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// of the LayoutShift.hadRecentInput bit).
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assert_equals(watcher.score, expectedScore);
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assert_equals(watcher.scoreWithInputExclusion, expectedScore);
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}, "Shift in pointerdown reported when it becomes a scroll.");
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</script>
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