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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
| commit | 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d (patch) | |
| tree | a31f07c9bcca9d56ce61e9a1ffd30ef350d513aa /testing/web-platform/tests/layout-instability/body-display-change.html | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.tar.xz firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.zip | |
Adding upstream version 115.8.0esr.upstream/115.8.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/layout-instability/body-display-change.html')
| -rw-r--r-- | testing/web-platform/tests/layout-instability/body-display-change.html | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/testing/web-platform/tests/layout-instability/body-display-change.html b/testing/web-platform/tests/layout-instability/body-display-change.html new file mode 100644 index 0000000000..0576bd6865 --- /dev/null +++ b/testing/web-platform/tests/layout-instability/body-display-change.html @@ -0,0 +1,51 @@ +<!DOCTYPE html> +<title>Layout Instability: shift accompanied by body display change</title> +<link rel="help" href="https://wicg.github.io/layout-instability/" /> +<style> + +body { margin: 0; } +#cont { + background: white; + width: 300px; + height: 200px; +} +#ch { + background: blue; + position: relative; + width: 300px; + height: 100px; + top: 100px; +} + +</style> +<style id="s"></style> +<div id="cont"> + <div id="ch"></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; + await waitForAnimationFrames(2); + + document.querySelector("#s").innerHTML = ` + body { + display: flex; + flex-direction: column; + } + #ch { top: 0; } + `; + + // An element of size (300 x 100) has shifted by 100px. + const expectedScore = computeExpectedScore(300 * (100 + 100), 100); + + // Observer fires after the frame is painted. + assert_equals(watcher.score, 0); + await watcher.promise; + assert_equals(watcher.score, expectedScore); +}, 'Shift accompanied by body display change.'); + +</script> |