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<!doctype html>
<title>TrackEvent constructor</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<div id=log></div>
<script>
test(function(){
var ev = new TrackEvent('foo');
assert_true(ev instanceof TrackEvent, 'ev instanceof TrackEvent');
assert_true(ev instanceof Event, 'ev instanceof Event');
assert_equals(ev.track, null, 'ev.track');
ev.track = {};
assert_equals(ev.track, null, 'ev.track after assignment');
}, document.title+', one arg');
test(function(){
var video = document.createElement('video');
var testTrack = video.addTextTrack('subtitles', 'foo', 'foo');
var ev = new TrackEvent('foo', {track: testTrack});
assert_true(ev instanceof TrackEvent, 'ev instanceof TrackEvent');
assert_true(ev instanceof Event, 'ev instanceof Event');
assert_equals(ev.track, testTrack, 'ev.track');
ev.track = {};
assert_equals(ev.track, testTrack, 'ev.track after assignment');
}, document.title+', two args');
</script>
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