| Index: third_party/WebKit/LayoutTests/imported/web-platform-tests/web-animations/animation-effect-timing/easing.html | 
| diff --git a/third_party/WebKit/LayoutTests/imported/web-platform-tests/web-animations/animation-effect-timing/easing.html b/third_party/WebKit/LayoutTests/imported/web-platform-tests/web-animations/animation-effect-timing/easing.html | 
| new file mode 100644 | 
| index 0000000000000000000000000000000000000000..51c21dde4a12aad0995f07eb2dda933a7d33ea58 | 
| --- /dev/null | 
| +++ b/third_party/WebKit/LayoutTests/imported/web-platform-tests/web-animations/animation-effect-timing/easing.html | 
| @@ -0,0 +1,84 @@ | 
| +<!DOCTYPE html> | 
| +<meta charset=utf-8> | 
| +<title>easing tests</title> | 
| +<link rel="help" href="https://w3c.github.io/web-animations/#dom-animationeffecttiming-easing"> | 
| +<script src="../../../../resources/testharness.js"></script> | 
| +<script src="../../../../resources/testharnessreport.js"></script> | 
| +<script src="../testcommon.js"></script> | 
| +<script src="../resources/effect-easing-tests.js"></script> | 
| +<body> | 
| +<div id="log"></div> | 
| +<script> | 
| +'use strict'; | 
| + | 
| +function assert_progress(animation, currentTime, easingFunction) { | 
| +  animation.currentTime = currentTime; | 
| +  var portion = currentTime / animation.effect.timing.duration; | 
| +  assert_approx_equals(animation.effect.getComputedTiming().progress, | 
| +                       easingFunction(portion), | 
| +                       0.01, | 
| +                       'The progress of the animation should be approximately ' + | 
| +                       easingFunction(portion) + ' at ' + currentTime + 'ms'); | 
| +} | 
| + | 
| +gEffectEasingTests.forEach(function(options) { | 
| +  test(function(t) { | 
| +    var target = createDiv(t); | 
| +    var anim = target.animate([ { opacity: 0 }, { opacity: 1 } ], | 
| +                              { duration: 1000 * MS_PER_SEC, | 
| +                                fill: 'forwards' }); | 
| +    anim.effect.timing.easing = options.easing; | 
| +    assert_equals(anim.effect.timing.easing, options.easing); | 
| + | 
| +    var easing = options.easingFunction; | 
| +    assert_progress(anim, 0, easing); | 
| +    assert_progress(anim, 250 * MS_PER_SEC, easing); | 
| +    assert_progress(anim, 500 * MS_PER_SEC, easing); | 
| +    assert_progress(anim, 750 * MS_PER_SEC, easing); | 
| +    assert_progress(anim, 1000 * MS_PER_SEC, easing); | 
| +  }, options.desc); | 
| +}); | 
| + | 
| +test(function(t) { | 
| +  var div = createDiv(t); | 
| +  var anim = div.animate({ opacity: [ 0, 1 ] }, 100 * MS_PER_SEC); | 
| +  assert_throws({ name: 'TypeError' }, | 
| +                function() { | 
| +                  anim.effect.timing.easing = ''; | 
| +                }); | 
| +  assert_throws({ name: 'TypeError' }, | 
| +                function() { | 
| +                  anim.effect.timing.easing = 'test'; | 
| +                }); | 
| +}, 'Test invalid easing value'); | 
| + | 
| +test(function(t) { | 
| +  var delay = 1000 * MS_PER_SEC; | 
| + | 
| +  var target = createDiv(t); | 
| +  var anim = target.animate([ { opacity: 0 }, { opacity: 1 } ], | 
| +                            { duration: 1000 * MS_PER_SEC, | 
| +                              fill: 'both', | 
| +                              delay: delay, | 
| +                              easing: 'steps(2, start)' }); | 
| + | 
| +  anim.effect.timing.easing = 'steps(2, end)'; | 
| +  assert_equals(anim.effect.getComputedTiming().progress, 0, | 
| +                'easing replace to steps(2, end) at before phase'); | 
| + | 
| +  anim.currentTime = delay + 750 * MS_PER_SEC; | 
| +  assert_equals(anim.effect.getComputedTiming().progress, 0.5, | 
| +                'change currentTime to active phase'); | 
| + | 
| +  anim.effect.timing.easing = 'steps(2, start)'; | 
| +  assert_equals(anim.effect.getComputedTiming().progress, 1, | 
| +                'easing replace to steps(2, start) at active phase'); | 
| + | 
| +  anim.currentTime = delay + 1500 * MS_PER_SEC; | 
| +  anim.effect.timing.easing = 'steps(2, end)'; | 
| +  assert_equals(anim.effect.getComputedTiming().progress, 1, | 
| +                'easing replace to steps(2, end) again at after phase'); | 
| +}, 'Change the easing while the animation is running'); | 
| + | 
| +</script> | 
| +</body> | 
|  |