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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=882703
-->
<head>
<meta charset="utf-8">
<title>Media test: TextTrackList change event</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<p id="display"></p>
<div id="content">
</div>
<pre id="test">
<script class="testbody" type="text/javascript">
SimpleTest.waitForExplicitFinish();
let video = document.createElement("video");
isnot(video.textTracks, null, "Video should have a list of TextTracks.");
video.addTextTrack("subtitles", "", "");
let track = video.textTracks[0];
video.textTracks.addEventListener("change", changed);
is(track.mode, "hidden", "New TextTrack's mode should be hidden.");
track.mode = "showing";
// Bug882674: change the mode again to see if we receive only one
// change event.
track.mode = "hidden";
var eventCount = 0;
function changed(event) {
eventCount++;
is(eventCount, 1, "change event dispatched multiple times.");
is(event.target, video.textTracks, "change event's target should be video.textTracks.");
ok(event instanceof window.Event, "change event should be a simple event.");
ok(!event.bubbles, "change event should not bubble.");
ok(event.isTrusted, "change event should be trusted.");
ok(!event.cancelable, "change event should not be cancelable.");
// Delay the finish function call for testing the change event count.
setTimeout(SimpleTest.finish, 0);
}
</script>
</pre>
</body>
</html>
|
