LayoutTests/animations/animation-callback-timestamp.html - WebKit - Git at Google

 <!DOCTYPE HTML>
 <html>
 <head>
     <script src="../resources/js-test-pre.js"></script>
 </head>
 <body>
     <script>
         var currentFrame = 0;
         var failed = false;

         function finishTest()
         {
             if (failed)
                 testFailed("Some of the requestAnimationFrame() callback timestamps were larger than Performance.now() by more than 3ms.");
             else
                 testPassed("All the differences between requestAnimationFrame() callback timestamps and Performance.now() were within 3ms.")
             finishJSTest();
         }

         function doAnimation(timestamp)
         {
             const Tolerance = 3;
             const WarmupFrames = 5;

             var performanceNow = window.performance.now();
             if (++currentFrame > WarmupFrames && Math.abs(timestamp - performanceNow) >= Tolerance) {
                 debug("requestAnimationFrame() timestamp = " + timestamp + ", window.performance.now() = " + performanceNow);
                 failed = true;
             }

             const MaxFrames = 25;
             if (currentFrame == MaxFrames)
                 finishTest();
             else
                 requestAnimationFrame(doAnimation);
         }

         window.jsTestIsAsync = true;
         requestAnimationFrame(doAnimation);
     </script>
     <script src="../resources/js-test-post.js"></script>
 </body>
 </html>
	<!DOCTYPE HTML>
	<html>
	<head>
	<script src="../resources/js-test-pre.js"></script>
	</head>
	<body>
	<script>
	var currentFrame = 0;
	var failed = false;

	function finishTest()
	{
	if (failed)
	testFailed("Some of the requestAnimationFrame() callback timestamps were larger than Performance.now() by more than 3ms.");
	else
	testPassed("All the differences between requestAnimationFrame() callback timestamps and Performance.now() were within 3ms.")
	finishJSTest();
	}

	function doAnimation(timestamp)
	{
	const Tolerance = 3;
	const WarmupFrames = 5;

	var performanceNow = window.performance.now();
	if (++currentFrame > WarmupFrames && Math.abs(timestamp - performanceNow) >= Tolerance) {
	debug("requestAnimationFrame() timestamp = " + timestamp + ", window.performance.now() = " + performanceNow);
	failed = true;
	}

	const MaxFrames = 25;
	if (currentFrame == MaxFrames)
	finishTest();
	else
	requestAnimationFrame(doAnimation);
	}

	window.jsTestIsAsync = true;
	requestAnimationFrame(doAnimation);
	</script>
	<script src="../resources/js-test-post.js"></script>
	</body>
	</html>