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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
| commit | 43a97878ce14b72f0981164f87f2e35e14151312 (patch) | |
| tree | 620249daf56c0258faa40cbdcf9cfba06de2a846 /testing/web-platform/tests/layout-instability/composited-element-movement.html | |
| parent | Initial commit. (diff) | |
| download | firefox-43a97878ce14b72f0981164f87f2e35e14151312.tar.xz firefox-43a97878ce14b72f0981164f87f2e35e14151312.zip | |
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/layout-instability/composited-element-movement.html')
| -rw-r--r-- | testing/web-platform/tests/layout-instability/composited-element-movement.html | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/testing/web-platform/tests/layout-instability/composited-element-movement.html b/testing/web-platform/tests/layout-instability/composited-element-movement.html new file mode 100644 index 0000000000..c990690335 --- /dev/null +++ b/testing/web-platform/tests/layout-instability/composited-element-movement.html @@ -0,0 +1,52 @@ +<!DOCTYPE html> +<title>Layout Instability: element with compositing layer hint</title> +<link rel="help" href="https://wicg.github.io/layout-instability/" /> +<style> + +#shift { + position: relative; + width: 500px; + height: 200px; + background: yellow; +} +#container { + position: absolute; + width: 350px; + height: 400px; + right: 50px; + top: 100px; + background: #ccc; +} +.promote { will-change: transform; } + +</style> +<div id="container" class="promote"> + <div id="space"></div> + <div id="shift" class="promote"></div> +</div> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<script src="resources/util.js"></script> +<script> + +promise_test(async () => { + const watcher = new ScoreWatcher; + + // Wait for the initial render to complete. + await waitForAnimationFrames(2); + + // Induce a shift. + document.querySelector("#space").style = "height: 100px"; + + // #shift is 400x200 after viewport intersection with correct application of + // composited #container offset, and 100px lower after shifting, so impact + // region is 400 * (200 + 100). + const expectedScore = computeExpectedScore(400 * (200 + 100), 100); + + // Observer fires after the frame is painted. + assert_equals(watcher.score, 0); + await watcher.promise; + assert_equals(watcher.score, expectedScore); +}, "Element with compositing layer hint."); + +</script> |