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<!doctype html>
<title>TextTrackList.onaddtrack</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<div id=log></div>
<script>
setup(function(){
window.tracks = document.createElement('video').textTracks;
window.ev = new Event('addtrack');
window.ran = false;
window.cb = function() { ran = true; };
});
test(function(){
assert_equals(tracks.onaddtrack, null);
tracks.onaddtrack = cb;
assert_equals(tracks.onaddtrack, cb);
tracks.dispatchEvent(ev);
assert_true(ran);
tracks.onaddtrack = null;
ran = false;
tracks.dispatchEvent(ev);
assert_false(ran);
});
test(function(){
tracks.addEventListener('addtrack', cb, false);
tracks.dispatchEvent(ev);
assert_true(ran);
tracks.removeEventListener('addtrack', cb, false);
ran = false;
tracks.dispatchEvent(ev);
assert_false(ran);
}, 'TextTrackList.addEventListener/removeEventListener');
</script>
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