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Test Info: Warnings

<!DOCTYPE html>
<title>Layout Instability: movement distance uses starting corner</title>
<link rel="help" href="" />
#shifter { position: relative; width: 100px; height: 100px; direction: rtl; background: blue; }
<div id='shifter'></div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/util.js"></script>
promise_test(async () => {
const watcher = new ScoreWatcher;
// Wait for the initial render to complete.
await waitForAnimationFrames(2);
// Move the left edge rightward by 10px and the right edge leftward by 20px.
document.querySelector("#shifter").style = "width: 70px; left: 10px";
// The movement distance should use the displacement of the right edge.
const expectedScore = computeExpectedScore(100 * 100, 20);
await watcher.promise;
assert_equals(watcher.score, expectedScore);
}, 'RTL element.');