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Diffstat (limited to '')
| -rw-r--r-- | testing/web-platform/tests/layout-instability/shift-with-overflow-status-change.html | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/testing/web-platform/tests/layout-instability/shift-with-overflow-status-change.html b/testing/web-platform/tests/layout-instability/shift-with-overflow-status-change.html new file mode 100644 index 0000000000..33eea3080b --- /dev/null +++ b/testing/web-platform/tests/layout-instability/shift-with-overflow-status-change.html @@ -0,0 +1,33 @@ +<!DOCTYPE html> +<title>Layout Instability: change under overflow clipping container causing shift and overflow status change at the same time</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="height: 100px"></div> +<div style="overflow: auto; width: 400px; height: 400px"> + <div id="resized" style="width: 600px; height: 100px; background: gray"></div> + <div id="shifted" style="width: 300px; height: 100px; background: blue"></div> +</div> +<script> +promise_test(async () => { + const watcher = new ScoreWatcher; + + // Wait for the initial render to complete. + await waitForAnimationFrames(2); + + resized.style.width = '200px'; + resized.style.height = '200px'; + + const expectedScore = computeExpectedScore(300 * (100 + 100), 100); + + assert_equals(watcher.score, 0); + await watcher.promise; + assert_equals(watcher.score, expectedScore); + + resized.style.width = '600px'; + resized.style.height = '100px'; + await watcher.promise; + assert_equals(watcher.score, expectedScore * 2); +}, 'Change under overflow clipping container causing shift and overflow status change at the same time'); +</script> |