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106 lines
3.2 KiB
HTML
106 lines
3.2 KiB
HTML
<!doctype html>
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<meta charset=utf-8>
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<script src="../testcommon.js"></script>
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<style>
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div {
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/* Make it easier to calculate expected values: */
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animation-timing-function: linear ! important;
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}
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@keyframes anim {
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from { margin-left: 100px; }
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to { margin-left: 200px; }
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}
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</style>
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<body>
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<script>
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'use strict';
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function assert_playbackrate(animation,
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previousAnimationCurrentTime,
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previousTimelineCurrentTime,
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description) {
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var accuracy = 0.001; /* accuracy of DOMHighResTimeStamp */
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var animationCurrentTimeDifference =
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animation.currentTime - previousAnimationCurrentTime;
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var timelineCurrentTimeDifference =
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animation.timeline.currentTime - previousTimelineCurrentTime;
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assert_approx_equals(animationCurrentTimeDifference,
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timelineCurrentTimeDifference * animation.playbackRate,
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accuracy,
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description);
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}
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async_test(function(t) {
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var div = addDiv(test, {'style': 'animation: anim 10s'});
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var animation = div.getAnimations()[0];
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animation.ready.then(t.step_func_done(function() {
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animation.currentTime = 7000; // ms
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animation.playbackRate = 0.5;
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assert_equals(animation.currentTime, 7000,
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'Reducing Animation.playbackRate should not change the currentTime ' +
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'of a playing animation');
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animation.playbackRate = 2;
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assert_equals(animation.currentTime, 7000,
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'Increasing Animation.playbackRate should not change the currentTime ' +
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'of a playing animation');
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}));
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}, 'Test the initial effect of setting playbackRate on currentTime');
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async_test(function(t) {
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var div = addDiv(test, {'style': 'animation: anim 100s'});
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var animation = div.getAnimations()[0];
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animation.playbackRate = 2;
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var previousTimelineCurrentTime;
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var previousAnimationCurrentTime;
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animation.ready.then(function() {
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previousAnimationCurrentTime = animation.currentTime;
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previousTimelineCurrentTime = animation.timeline.currentTime;
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return waitForFrame();
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}).then(t.step_func_done(function() {
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assert_playbackrate(animation,
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previousAnimationCurrentTime,
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previousTimelineCurrentTime,
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'animation.currentTime should be 10 times faster than timeline.');
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}));
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}, 'Test the effect of setting playbackRate on currentTime');
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async_test(function(t) {
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var div = addDiv(test, {'style': 'animation: anim 100s'});
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var animation = div.getAnimations()[0];
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animation.playbackRate = 2;
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var previousTimelineCurrentTime;
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var previousAnimationCurrentTime;
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animation.ready.then(function() {
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previousAnimationCurrentTime = animation.currentTime;
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previousTimelineCurrentTime = animation.timeline.currentTime;
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animation.playbackRate = 1;
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return waitForFrame();
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}).then(t.step_func_done(function() {
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assert_equals(animation.playbackRate, 1,
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'sanity check: animation.playbackRate is still 1.');
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assert_playbackrate(animation,
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previousAnimationCurrentTime,
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previousTimelineCurrentTime,
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'animation.currentTime should be the same speed as timeline now.');
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}));
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}, 'Test the effect of setting playbackRate while playing animation');
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done();
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</script>
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</body>
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