42 lines
1.5 KiB
HTML
42 lines
1.5 KiB
HTML
<!DOCTYPE html>
|
|
<title>Layout Instability: inline/text movement is detected</title>
|
|
<link rel="help" href="https://wicg.github.io/layout-instability/" />
|
|
<script src="/resources/testharness.js"></script>
|
|
<script src="/resources/testharnessreport.js"></script>
|
|
<script src="resources/util.js"></script>
|
|
<div style="width: 200px; font-size: 20px; line-height: 25px">
|
|
1AAAAAAA<br>
|
|
2AAAAAAA<br>
|
|
3AAAAAAA<br>
|
|
<div id="inline-block" style="display: inline-block; height: 50px">4AAAAAAA</div><br>
|
|
5AAAAAAA<br>
|
|
6AAAAAAA<br>
|
|
7AAAAAAA<br>
|
|
</div>
|
|
<script>
|
|
|
|
promise_test(async () => {
|
|
const watcher = new ScoreWatcher;
|
|
|
|
// Wait for the initial render to complete.
|
|
await waitForAnimationFrames(2);
|
|
|
|
// Modify the position of the div.
|
|
const inline_block = document.querySelector("#inline-block");
|
|
inline_block.style.height = '100px';
|
|
|
|
// The lines below the inline-block are shifted down by 50px.
|
|
// The implementation may measure the real width of the shifted text
|
|
// or use the available width (i.e. width of the containing block).
|
|
// Also tolerate extra 10% error.
|
|
const text_width = inline_block.offsetWidth;
|
|
const expectedScoreMin = computeExpectedScore(text_width * (30 * 3 + 50), 50) * 0.9;
|
|
const expectedScoreMax = computeExpectedScore(200 * (30 * 3 + 50), 50) * 1.1;
|
|
|
|
// Observer fires after the frame is painted.
|
|
assert_equals(watcher.score, 0);
|
|
await watcher.promise;
|
|
assert_between_exclusive(watcher.score, expectedScoreMin, expectedScoreMax);
|
|
}, 'Inline flow movement.');
|
|
|
|
</script>
|