chromium/src/third_party/blink/web_tests/paint/invalidation/multicol/multicol-resize-with-rule.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <div id="columns" style="columns: 8; column-rule: 2px solid green; width: 400px">
 <div style="height: 1600px"></div>
 </div>
 <script src="../resources/text-based-repaint.js"></script>
 <script>
 function repaintTest() {
   columns.style.width = '600px';
 }
 onload = runRepaintAndPixelTest;
 </script>
	<!DOCTYPE html>
	<div id="columns" style="columns: 8; column-rule: 2px solid green; width: 400px">
	<div style="height: 1600px"></div>
	</div>
	<script src="../resources/text-based-repaint.js"></script>
	<script>
	function repaintTest() {
	columns.style.width = '600px';
	}
	onload = runRepaintAndPixelTest;
	</script>