src/third_party/web_platform_tests/web-animations/animation-timeline/idlharness.html

<!doctype html>
<meta charset=utf-8>
<title>Web Animations API: DocumentTimeline tests</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/WebIDLParser.js"></script>
<script src="/resources/idlharness.js"></script>
<div id="log"></div>
<script type="text/plain" id="DocumentTimeline-IDL">
interface AnimationTimeline {
  readonly attribute double? currentTime;
};

interface DocumentTimeline : AnimationTimeline {
};
</script>
<script>
'use strict';

var idlArray;
test(function() {
  idlArray = new IdlArray();
  idlArray.add_idls(
    document.getElementById('DocumentTimeline-IDL').textContent);
  idlArray.add_objects( { DocumentTimeline: ['document.timeline'] } );
});
idlArray.test();

</script>