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<!doctype html>
<meta charset=utf-8>
<title>Setting the current time of an animation</title>
<link rel="help"
href="https://drafts.csswg.org/web-animations-1/#setting-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 anim = new Animation();
assert_equals(anim.playState, 'idle');
assert_equals(anim.currentTime, null);
// This should not throw because the currentTime is already null.
anim.currentTime = null;
}, 'Setting the current time of a pending animation to unresolved does not'
+ ' throw a TypeError');
promise_test(async t => {
const anim = createDiv(t).animate(null, 100 * MS_PER_SEC);
await anim.ready;
assert_greater_than_equal(anim.currentTime, 0);
assert_throws({ name: 'TypeError' }, () => {
anim.currentTime = null;
});
}, 'Setting the current time of a playing animation to unresolved throws a'
+ ' TypeError');
promise_test(async t => {
const anim = createDiv(t).animate(null, 100 * MS_PER_SEC);
await anim.ready;
anim.pause();
assert_greater_than_equal(anim.currentTime, 0);
assert_throws({ name: 'TypeError' }, () => {
anim.currentTime = null;
});
}, 'Setting the current time of a paused animation to unresolved throws a'
+ ' TypeError');
promise_test(async t => {
const anim = createDiv(t).animate(null, 100 * MS_PER_SEC);
await anim.ready;
anim.pause();
// We should be pause-pending now
assert_true(anim.pending);
assert_equals(anim.playState, 'paused');
// Apply a pending playback rate
anim.updatePlaybackRate(2);
assert_equals(anim.playbackRate, 1);
// Setting the current time should apply the pending playback rate
anim.currentTime = 50 * MS_PER_SEC;
assert_equals(anim.playbackRate, 2);
assert_false(anim.pending);
// Sanity check that the current time is preserved
assert_time_equals_literal(anim.currentTime, 50 * MS_PER_SEC);
}, 'Setting the current time of a pausing animation applies a pending playback'
+ ' rate');
</script>
</body>
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