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170 lines
6 KiB
HTML
170 lines
6 KiB
HTML
<!doctype html>
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<meta charset=utf-8>
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<title>Pausing a CSSAnimation</title>
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<link rel="help"
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href="https://drafts.csswg.org/css-animations-2/#animation-play-state">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="support/testcommon.js"></script>
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<style>
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@keyframes anim {
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0% { margin-left: 0px }
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100% { margin-left: 10000px }
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}
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</style>
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<div id="log"></div>
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<script>
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'use strict';
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const getMarginLeft = cs => parseFloat(cs.marginLeft);
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promise_test(async t => {
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const div = addDiv(t);
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const cs = getComputedStyle(div);
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div.style.animation = 'anim 1000s paused';
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const animation = div.getAnimations()[0];
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assert_equals(getMarginLeft(cs), 0,
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'Initial value of margin-left is zero');
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animation.play();
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await animation.ready;
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await waitForNextFrame();
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assert_greater_than(getMarginLeft(cs), 0,
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'Playing value of margin-left is greater than zero');
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}, 'play() overrides animation-play-state');
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promise_test(async t => {
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const div = addDiv(t);
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const cs = getComputedStyle(div);
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div.style.animation = 'anim 1000s paused';
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const animation = div.getAnimations()[0];
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assert_equals(getMarginLeft(cs), 0,
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'Initial value of margin-left is zero');
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animation.pause();
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div.style.animationPlayState = 'running';
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await animation.ready;
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await waitForNextFrame();
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assert_equals(cs.animationPlayState, 'running',
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'animation-play-state is running');
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assert_equals(getMarginLeft(cs), 0,
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'Paused value of margin-left is zero');
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}, 'pause() overrides animation-play-state');
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promise_test(async t => {
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const div = addDiv(t);
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const cs = getComputedStyle(div);
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div.style.animation = 'anim 1000s paused';
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const animation = div.getAnimations()[0];
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assert_equals(getMarginLeft(cs), 0,
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'Initial value of margin-left is zero');
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animation.play();
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await animation.ready;
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div.style.animationPlayState = 'running';
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cs.animationPlayState; // Trigger style resolution
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await waitForNextFrame();
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assert_equals(cs.animationPlayState, 'running',
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'animation-play-state is running');
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div.style.animationPlayState = 'paused';
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await animation.ready;
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assert_equals(cs.animationPlayState, 'paused',
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'animation-play-state is paused');
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const previousAnimVal = getMarginLeft(cs);
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await waitForNextFrame();
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assert_equals(getMarginLeft(cs), previousAnimVal,
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'Animated value of margin-left does not change when'
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+ ' paused by style');
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}, 'play() is overridden by later setting "animation-play-state: paused"');
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promise_test(async t => {
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const div = addDiv(t);
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const cs = getComputedStyle(div);
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div.style.animation = 'anim 1000s';
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const animation = div.getAnimations()[0];
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assert_equals(getMarginLeft(cs), 0,
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'Initial value of margin-left is zero');
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// Set the specified style first. If implementations fail to
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// apply the style changes first, they will ignore the redundant
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// call to play() and fail to correctly override the pause style.
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div.style.animationPlayState = 'paused';
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animation.play();
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const previousAnimVal = getMarginLeft(cs);
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await animation.ready;
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await waitForNextFrame();
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assert_equals(cs.animationPlayState, 'paused',
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'animation-play-state is paused');
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assert_greater_than(getMarginLeft(cs), previousAnimVal,
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'Playing value of margin-left is increasing');
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}, 'play() flushes pending changes to animation-play-state first');
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promise_test(async t => {
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const div = addDiv(t);
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const cs = getComputedStyle(div);
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div.style.animation = 'anim 1000s paused';
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const animation = div.getAnimations()[0];
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assert_equals(getMarginLeft(cs), 0,
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'Initial value of margin-left is zero');
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// Unlike the previous test for play(), since calling pause() is sticky,
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// we'll apply it even if the underlying style also says we're paused.
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//
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// We would like to test that implementations flush styles before running
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// pause() but actually there's no style we can currently set that will
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// change the behavior of pause(). That may change in the future
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// (e.g. if we introduce animation-timeline or animation-playback-rate etc.).
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//
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// For now this just serves as a sanity check that we do the same thing
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// even if we set style before calling the API.
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div.style.animationPlayState = 'running';
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animation.pause();
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const previousAnimVal = getMarginLeft(cs);
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await animation.ready;
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await waitForNextFrame();
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assert_equals(cs.animationPlayState, 'running',
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'animation-play-state is running');
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assert_equals(getMarginLeft(cs), previousAnimVal,
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'Paused value of margin-left does not change');
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}, 'pause() applies pending changes to animation-play-state first');
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// (Note that we can't actually test for this; see comment above, in test-body.)
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promise_test(async t => {
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const div = addDiv(t, { style: 'animation: anim 1000s' });
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const animation = div.getAnimations()[0];
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let readyPromiseRun = false;
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await animation.ready;
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div.style.animationPlayState = 'paused';
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assert_true(animation.pending && animation.playState === 'paused',
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'Animation is pause-pending');
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// Set current time
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animation.currentTime = 5 * MS_PER_SEC;
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assert_equals(animation.playState, 'paused',
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'Animation is paused immediately after setting currentTime');
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assert_equals(animation.startTime, null,
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'Animation startTime is unresolved immediately after ' +
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'setting currentTime');
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assert_equals(animation.currentTime, 5 * MS_PER_SEC,
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'Animation currentTime does not change when forcing a ' +
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'pause operation to complete');
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// The ready promise should now be resolved. If it's not then test will
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// probably time out before anything else happens that causes it to resolve.
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await animation.ready;
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}, 'Setting the current time completes a pending pause');
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</script>
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