gecko-dev/dom/media/test/test_trackelementsrc.html

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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Test for Bug 1281418 - Change the src attribue for TrackElement.</title>
<script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
<script type="text/javascript" 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" style="display: none">
</div>
<pre id="test">
<script class="testbody" type="text/javascript">
SimpleTest.waitForExplicitFinish();
SpecialPowers.pushPrefEnv({"set": [["media.webvtt.regions.enabled", true]]},
function() {
var video = document.createElement("video");
video.src = "seek.webm";
video.preload = "metadata";
var trackElement = document.createElement("track");
trackElement.src = "basic.vtt";
trackElement.default = true;
document.getElementById("content").appendChild(video);
video.appendChild(trackElement);
video.addEventListener("loadedmetadata", function metadata() {
if (trackElement.readyState <= 1) {
return setTimeout(metadata, 0);
}
is(video.textTracks.length, 1, "Length should be 1.");
is(video.textTracks[0].cues.length, 6, "Cue length should be 6.");
trackElement.src = "sequential.vtt";
trackElement.track.mode = "showing";
video.play();
});
video.addEventListener("ended", function end() {
is(trackElement.readyState, 2, "readyState should be 2.")
is(video.textTracks.length, 1, "Length should be 1.");
is(video.textTracks[0].cues.length, 3, "Cue length should be 3.");
SimpleTest.finish();
});
});
</script>
</pre>
</body>
</html>