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Diffstat (limited to '')
| -rw-r--r-- | testing/web-platform/tests/layout-instability/opacity-zero-layout-and-visible.html | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/testing/web-platform/tests/layout-instability/opacity-zero-layout-and-visible.html b/testing/web-platform/tests/layout-instability/opacity-zero-layout-and-visible.html new file mode 100644 index 0000000000..0172983cea --- /dev/null +++ b/testing/web-platform/tests/layout-instability/opacity-zero-layout-and-visible.html @@ -0,0 +1,31 @@ +<!DOCTYPE html> +<title>Layout Instability: opacity:0</title> +<link rel="help" href="https://wicg.github.io/layout-instability/" /> +<div id="target" style="position: absolute; top: 0; width: 200px; height: 200px; opacity: 0; background: blue"></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); + + // Shift target, for which no shift should be reported because it's not visible. + target.style.top = '200px'; + target.style.opacity = 0.9; + + await waitForAnimationFrames(2); + assert_equals(watcher.score, 0); + + // Shift again, for which shift should be reported. + target.style.top = '300px'; + + await watcher.promise; + const expectedScore = computeExpectedScore(200 * (200 + 100), 100); + assert_equals(watcher.score, expectedScore); +}, 'opacity:0'); + +</script> |