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CSSAnimation-pausing.tentative.html
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<!doctype html>
<meta charset=utf-8>
<title>Pausing a CSSAnimation</title>
<link rel="help"
href="https://drafts.csswg.org/css-animations-2/#animation-play-state">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/testcommon.js"></script>
<style>
@keyframes anim {
0% { margin-left: 0px }
100% { margin-left: 10000px }
}
</style>
<div id="log"></div>
<script>
'use strict';
promise_test(async t => {
const div = addDiv(t);
div.style.animation = 'anim 1000s paused';
const animation = div.getAnimations()[0];
animation.play();
await animation.ready;
await waitForNextFrame();
assert_equals(
animation.playState,
'running',
'Play state is running after calling play()'
);
// Flip the animation-play-state back and forth to check it has no effect
div.style.animationPlayState = 'running';
getComputedStyle(div).animationPlayState;
div.style.animationPlayState = 'paused';
getComputedStyle(div).animationPlayState;
assert_equals(
animation.playState,
'running',
'Should still be running even after flipping the animation-play-state'
);
}, 'play() overrides animation-play-state');
promise_test(async t => {
const div = addDiv(t);
div.style.animation = 'anim 100s infinite paused';
const animation = div.getAnimations()[0];
animation.playbackRate = -1;
animation.currentTime = -1;
assert_throws_dom('InvalidStateError', () => {
animation.play();
}, 'Trying to play a reversed infinite animation should throw');
assert_equals(
animation.playState,
'paused',
'Animation should still be paused'
);
animation.playbackRate = 1;
div.style.animationPlayState = 'running';
assert_equals(
animation.playState,
'running',
'Changing the animation-play-state should play the animation'
);
}, 'play() does NOT override the animation-play-state if there was an error');
promise_test(async t => {
const div = addDiv(t);
div.style.animation = 'anim 1000s paused';
const animation = div.getAnimations()[0];
animation.pause();
div.style.animationPlayState = 'running';
getComputedStyle(div).animationPlayState;
await animation.ready;
await waitForNextFrame();
assert_equals(animation.playState, 'paused', 'playState is paused ');
// Flip the animation-play-state back and forth to check it has no effect
div.style.animationPlayState = 'paused';
getComputedStyle(div).animationPlayState;
div.style.animationPlayState = 'running';
getComputedStyle(div).animationPlayState;
assert_equals(
animation.playState,
'paused',
'Should still be paused even after flipping the animation-play-state'
);
}, 'pause() overrides animation-play-state');
promise_test(async t => {
const div = addDiv(t);
div.style.animation = 'anim 100s paused';
const animation = div.getAnimations()[0];
animation.reverse();
assert_equals(
animation.playState,
'running',
'Play state is running after calling reverse()'
);
// Flip the animation-play-state back and forth to check it has no effect
div.style.animationPlayState = 'running';
getComputedStyle(div).animationPlayState;
div.style.animationPlayState = 'paused';
getComputedStyle(div).animationPlayState;
assert_equals(
animation.playState,
'running',
'Should still be running even after flipping the animation-play-state'
);
}, 'reverse() overrides animation-play-state when it starts playing the'
+ ' animation');
promise_test(async t => {
const div = addDiv(t);
div.style.animation = 'anim 100s';
const animation = div.getAnimations()[0];
animation.reverse();
assert_equals(
animation.playState,
'running',
'Play state is running after calling reverse()'
);
div.style.animationPlayState = 'paused';
getComputedStyle(div).animationPlayState;
assert_equals(
animation.playState,
'paused',
'Should be paused after changing the animation-play-state'
);
}, 'reverse() does NOT override animation-play-state if the animation is'
+ ' already running');
promise_test(async t => {
const div = addDiv(t);
div.style.animation = 'anim 100s';
const animation = div.getAnimations()[0];
animation.startTime = null;
assert_equals(
animation.playState,
'paused',
'Play state is paused after setting the start time to null'
);
// Flip the animation-play-state back and forth to check it has no effect
div.style.animationPlayState = 'paused';
getComputedStyle(div).animationPlayState;
div.style.animationPlayState = 'running';
getComputedStyle(div).animationPlayState;
assert_equals(
animation.playState,
'paused',
'Should still be paused even after flipping the animation-play-state'
);
}, 'Setting the startTime to null overrides animation-play-state if the'
+ ' animation is already running');
promise_test(async t => {
const div = addDiv(t);
div.style.animation = 'anim 100s paused';
const animation = div.getAnimations()[0];
animation.startTime = document.timeline.currentTime;
assert_equals(
animation.playState,
'running',
'Play state is running after setting the start time to non-null'
);
// Flip the animation-play-state back and forth to check it has no effect
div.style.animationPlayState = 'running';
getComputedStyle(div).animationPlayState;
div.style.animationPlayState = 'paused';
getComputedStyle(div).animationPlayState;
assert_equals(
animation.playState,
'running',
'Should still be running even after flipping the animation-play-state'
);
}, 'Setting the startTime to non-null overrides animation-play-state if the'
+ ' animation is paused');
promise_test(async t => {
const div = addDiv(t);
div.style.animation = 'anim 100s';
const animation = div.getAnimations()[0];
animation.startTime = document.timeline.currentTime;
div.style.animationPlayState = 'paused';
getComputedStyle(div).animationPlayState;
assert_equals(
animation.playState,
'paused',
'Should be paused after changing the animation-play-state'
);
}, 'Setting the startTime to non-null does NOT override the'
+ ' animation-play-state if the animation is already running');
promise_test(async t => {
const div = addDiv(t, { style: 'animation: anim 1000s' });
const animation = div.getAnimations()[0];
let readyPromiseRun = false;
await animation.ready;
div.style.animationPlayState = 'paused';
assert_true(animation.pending && animation.playState === 'paused',
'Animation is pause-pending');
// Set current time
animation.currentTime = 5 * MS_PER_SEC;
assert_equals(animation.playState, 'paused',
'Animation is paused immediately after setting currentTime');
assert_equals(animation.startTime, null,
'Animation startTime is unresolved immediately after ' +
'setting currentTime');
assert_equals(animation.currentTime, 5 * MS_PER_SEC,
'Animation currentTime does not change when forcing a ' +
'pause operation to complete');
// The ready promise should now be resolved. If it's not then test will
// probably time out before anything else happens that causes it to resolve.
await animation.ready;
}, 'Setting the current time completes a pending pause');
</script>