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<!DOCTYPE html>
<meta charset=utf-8>
<title>DocumentTimeline constructor tests</title>
<link rel="help" href="https://w3c.github.io/web-animations/#the-documenttimeline-interface">
<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(function(t) {
var timeline = new DocumentTimeline();
assert_times_equal(timeline.currentTime, document.timeline.currentTime);
}, 'An origin time of zero is used when none is supplied');
test(function(t) {
var timeline = new DocumentTimeline({ originTime: 0 });
assert_times_equal(timeline.currentTime, document.timeline.currentTime);
}, 'A zero origin time produces a document timeline with a current time ' +
'identical to the default document timeline');
test(function(t) {
var timeline = new DocumentTimeline({ originTime: 10 * MS_PER_SEC });
assert_times_equal(timeline.currentTime,
(document.timeline.currentTime - 10 * MS_PER_SEC));
}, 'A positive origin time makes the document timeline\'s current time lag ' +
'behind the default document timeline');
test(function(t) {
var timeline = new DocumentTimeline({ originTime: -10 * MS_PER_SEC });
assert_times_equal(timeline.currentTime,
(document.timeline.currentTime + 10 * MS_PER_SEC));
}, 'A negative origin time makes the document timeline\'s current time run ' +
'ahead of the default document timeline');
</script>
</body>
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