test_bug1242594.html

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<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=1242594

-->

<head>

  <meta charset='utf-8'>

  <title>Bug 1242594 - Unbind a video element with HTMLTrackElement

  should not remove the TextTrack</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();

var video = document.createElement("video");

video.src = "seek.webm";

video.preload = "auto";

var trackElement = document.createElement("track");

trackElement.src = "basic.vtt";

trackElement.kind = "subtitles";

document.getElementById("content").appendChild(video);

video.appendChild(trackElement);

// Bug 1242599, access video.textTracks.length immediately after

// the track element binds into the media element.

is(video.textTracks.length, 1, "Video should have one TextTrack.");

var parent = video.parentNode;

parent.removeChild(video);

is(video.textTracks.length, 1, "After unbind the video element, should have one TextTrack.");

parent.appendChild(video);

is(video.textTracks.length, 1, "After bind the video element, should have one TextTrack.");

SimpleTest.finish();

</script>

</pre>

</body>

</html>