constructor.html - mozsearch

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This WPT test may be referenced by the following Test IDs:
- /web-animations/interfaces/DocumentTimeline/constructor.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset=utf-8>

<title>DocumentTimeline constructor tests</title>

<link rel="help" href="https://drafts.csswg.org/web-animations/#the-documenttimeline-interface">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="../../testcommon.js"></script>

<script src="../../resources/timing-override.js"></script>

<body>

<div id="log"></div>

<script>

'use strict';

test(t => {

  const timeline = new DocumentTimeline();

  assert_times_equal(timeline.currentTime, document.timeline.currentTime);

}, 'An origin time of zero is used when none is supplied');

test(t => {

  const 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(t => {

  const 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(t => {

  const 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>