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<!DOCTYPE html>
<meta charset=utf-8>
<title>The current time of an animation</title>
<link rel="help" href="https://drafts.csswg.org/web-animations/#the-current-time-of-an-animation">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../../testcommon.js"></script>
<body>
<div id="log"></div>
<script>
'use strict';
test(t => {
const animation =
new Animation(new KeyframeEffect(createDiv(t), null, 100 * MS_PER_SEC),
document.timeline);
animation.play();
assert_equals(animation.currentTime, 0,
'Current time returns the hold time set when entering the play-pending ' +
'state');
}, 'The current time returns the hold time when set');
promise_test(async t => {
const animation =
new Animation(new KeyframeEffect(createDiv(t), null, 100 * MS_PER_SEC),
null);
await animation.ready;
assert_equals(animation.currentTime, null);
}, 'The current time is unresolved when there is no associated timeline ' +
'(and no hold time is set)');
// FIXME: Test that the current time is unresolved when we have an inactive
// timeline if we find a way of creating an inactive timeline!
test(t => {
const animation =
new Animation(new KeyframeEffect(createDiv(t), null, 100 * MS_PER_SEC),
document.timeline);
animation.startTime = null;
assert_equals(animation.currentTime, null);
}, 'The current time is unresolved when the start time is unresolved ' +
'(and no hold time is set)');
test(t => {
const animation =
new Animation(new KeyframeEffect(createDiv(t), null, 100 * MS_PER_SEC),
document.timeline);
animation.playbackRate = 2;
animation.startTime = document.timeline.currentTime - 25 * MS_PER_SEC;
const timelineTime = document.timeline.currentTime;
const startTime = animation.startTime;
const playbackRate = animation.playbackRate;
assert_times_equal(animation.currentTime,
(timelineTime - startTime) * playbackRate,
'Animation has a unresolved start time');
}, 'The current time is calculated from the timeline time, start time and ' +
'playback rate');
promise_test(async t => {
const animation = createDiv(t).animate(null, 100 * MS_PER_SEC);
animation.playbackRate = 0;
await animation.ready;
await waitForAnimationFrames(1);
assert_time_equals_literal(animation.currentTime, 0);
}, 'The current time does not progress if playback rate is 0');
</script>
</body>
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