<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=569520 --> <head> <title>Test for Bug 569520</title> <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> </head> <body> <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=569520">Mozilla Bug 569520</a> <p id="display"></p> <div id="content" style="display: none"> </div> <pre id="test"> <script type="application/javascript"> /** Test for Bug 569520 **/ SimpleTest.waitForExplicitFinish(); SimpleTest.requestFlakyTimeout("untriaged"); var start = window.performance.now(); var firstListenerArg; var secondListenerArg; var thirdListenerTime; // callback arg is in the same timeline as performance.now() function thirdListener(t) { thirdListenerTime = t; ok(secondListenerArg >= firstListenerArg, // callback args from consecutive requestAnimationFrame "Second listener should fire after first listener"); ok(thirdListenerTime >= secondListenerArg, "Third listener should fire after second listener"); ok(firstListenerArg >= start, "First listener should fire after start"); SimpleTest.finish(); } // callback arg is from requestAnimationFrame and comparable to performance.now() function secondListener(t) { secondListenerArg = t; requestAnimationFrame(thirdListener); } function firstListener(t) { firstListenerArg = t; requestAnimationFrame(secondListener); } addLoadEvent(function() { setTimeout(function() { requestAnimationFrame(firstListener); }, 100); }); </script> </pre> </body> </html>