test_bug1018933.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=1018933

-->

<head>

  <meta charset='utf-8'>

  <title>Regression test for bug 1018933 - HTMLTrackElement should create only one 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);

// Accessing the track now would have caused the bug as the track element

// shouldn't have had time to bind to the tree yet.

trackElement.track.mode = 'showing';

video.addEventListener("loadedmetadata", function run_tests() {

  // Re-que run_tests() at the end of the event loop until the track

  // element has loaded its data.

  if (trackElement.readyState == 1) {

    setTimeout(run_tests, 0);

    return;

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

  SimpleTest.finish();

});

</script>

</pre>

</body>

</html>