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-rw-r--r--testing/web-platform/tests/layout-instability/multicol-000.html22
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diff --git a/testing/web-platform/tests/layout-instability/multicol-000.html b/testing/web-platform/tests/layout-instability/multicol-000.html
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+++ b/testing/web-platform/tests/layout-instability/multicol-000.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<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 id="multicol" style="position:relative; columns:40; width:500px; column-gap:0;">
+ <div style="height:4000px; background:black;"></div>
+</div>
+<script>
+
+promise_test(async () => {
+ const watcher = new ScoreWatcher;
+ await waitForAnimationFrames(2);
+
+ multicol.style.top = '100px';
+ const expectedScore = computeExpectedScore(500 * (100 + 100), 100);
+
+ await watcher.promise;
+ assert_equals(watcher.score, expectedScore);
+}, 'Move balanced multicol container');
+
+</script>