LayoutTests/animations/steps-transform-rendering-updates.html - WebKit - Git at Google

 <!DOCTYPE HTML>
 <html>
 <head>
     <script src="../resources/js-test-pre.js"></script>
     <style>
         #box {
             width: 100px;
             height: 100px;
             background-color: silver;
         }

         #box.animating {
             animation: spinner 0.25s steps(2) 1;
         }

         @keyframes spinner {
             from { transform:rotate(0deg); }
             to   { transform:rotate(360deg); }
         }
     </style>
     <script>
         window.jsTestIsAsync = true;

         let count = 0;
         window.addEventListener('load', () => {
             if (!window.internals) {
                 finishJSTest();
                 return;
             }

             let box = document.getElementById('box');
             box.addEventListener('animationstart', () => {
                 internals.startTrackingRenderingUpdates();
                 shouldBe('count', '0');
             }, false);
             box.addEventListener('animationend', () => {
                 count = internals.renderingUpdateCount();
                 shouldBeTrue('count < 6');
                 finishJSTest();
             }, false);

             box.classList.add('animating');
         }, false);
     </script>
 </head>
 <body>
     <div id="box"></div>
     <div id="console"></div>
     <script src="../resources/js-test-post.js"></script>
 </body>
 </html>
	<!DOCTYPE HTML>
	<html>
	<head>
	<script src="../resources/js-test-pre.js"></script>
	<style>
	#box {
	width: 100px;
	height: 100px;
	background-color: silver;
	}

	#box.animating {
	animation: spinner 0.25s steps(2) 1;
	}

	@keyframes spinner {
	from { transform:rotate(0deg); }
	to { transform:rotate(360deg); }
	}
	</style>
	<script>
	window.jsTestIsAsync = true;

	let count = 0;
	window.addEventListener('load', () => {
	if (!window.internals) {
	finishJSTest();
	return;
	}

	let box = document.getElementById('box');
	box.addEventListener('animationstart', () => {
	internals.startTrackingRenderingUpdates();
	shouldBe('count', '0');
	}, false);
	box.addEventListener('animationend', () => {
	count = internals.renderingUpdateCount();
	shouldBeTrue('count < 6');
	finishJSTest();
	}, false);

	box.classList.add('animating');
	}, false);
	</script>
	</head>
	<body>
	<div id="box"></div>
	<div id="console"></div>
	<script src="../resources/js-test-post.js"></script>
	</body>
	</html>