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<!DOCTYPE html>
<title>'addtrack' event is fired when a TextTrack is created</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
async_test(function(t) {
var video = document.createElement('video');
var trackElement = document.createElement('track');
video.appendChild(trackElement);
var tracks = [];
tracks.push(trackElement.track);
// Register the 'addtrack' listener after creating the element
// to make sure the event is dispatched asynchronously.
video.textTracks.onaddtrack = t.step_func(function(event) {
assert_equals(event.target, video.textTracks);
assert_true(event instanceof TrackEvent, 'instanceof');
assert_equals(event.track, tracks[video.textTracks.length - 1]);
if (video.textTracks.length == 1) {
tracks.push(video.addTextTrack('captions', 'Caption Track', 'en'));
assert_equals(video.textTracks.length, 2);
} else {
t.done();
}
});
trackElement.src = 'resources/webvtt-file.vtt';
trackElement.track.mode = 'hidden';
assert_equals(video.textTracks.length, 1);
assert_equals(trackElement.readyState, HTMLTrackElement.NONE);
});
</script>
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