| <!doctype html> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <style> |
| .start { |
| animation: anim 1ms; |
| } |
| |
| @keyframes anim { |
| 0% { |
| transform: translate3d(0, 0, 1px); |
| } |
| 100% { |
| transform: translate3d(0, 0, 0); |
| } |
| } |
| </style> |
| <body>x |
| <script> |
| 'use strict'; |
| async_test(function(t) { |
| |
| requestAnimationFrame(function() { |
| document.body.classList.add('start'); |
| |
| // Force a style resolve, to ensure the animation is created. |
| document.body.offsetTop; |
| |
| var animation = document.body.getAnimations()[0]; |
| requestAnimationFrame(function() { |
| if (animation.playState === 'pending') { |
| var passed = false; |
| document.body.addEventListener('animationstart', function() { |
| passed = true; |
| }); |
| document.body.addEventListener('animationend', function() { |
| t.step(function() { |
| assert_true(passed); |
| t.done(); |
| }); |
| }); |
| } else { |
| // The animation is no longer pending. |
| |
| // We missed the opportunity to add a start event listener |
| // before the animation started. This test might flakily |
| // pass even if the implementation is incorrect. |
| t.done(); |
| } |
| }); |
| }); |
| }); |
| </script> |
