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<!DOCTYPE HTML>
<html>
<head>
<title>Test for Bug 881976 - TextTrackList</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="text/javascript" src="manifest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<video id="v" src="seek.webm" preload="metadata">
<script type="text/javascript">
/**
* This test is used to ensure the text track list we got from video is as same
* as the one in the text track.
*/
var video = document.getElementById("v");
async function runTest() {
addTrackViaAddTrackAPI();
await addTrackViaTrackElement();
SimpleTest.finish();
}
SimpleTest.waitForExplicitFinish();
onload = runTest;
/**
* The following are test helper functions.
*/
function addTrackViaAddTrackAPI() {
// Check if adding a text track manually sets the TextTrackList correctly.
video.addTextTrack("subtitles", "", "");
// TextTrack.textTrackList is an extension available only to privileged code,
// so we need to access it through the SpecialPowers object.
is(SpecialPowers.unwrap(SpecialPowers.wrap(video.textTracks[0]).textTrackList),
video.textTracks,
"The Track's TextTrackList should be the Video's TextTrackList.");
}
async function addTrackViaTrackElement() {
// Check if loading a Track via a TrackElement sets the TextTrackList correctly.
let trackElement = document.createElement("track");
trackElement.src = "basic.vtt";
trackElement.kind = "subtitles";
trackElement.default = true;
video.appendChild(trackElement);
info(`wait until the track finishes loading`);
await once(trackElement, "load");
is(trackElement.readyState, HTMLTrackElement.LOADED,
"Track::ReadyState should be set to LOADED.");
is(SpecialPowers.unwrap(SpecialPowers.wrap(trackElement.track).textTrackList),
video.textTracks,
"TrackElement's Track's TextTrackList should be the Video's TextTrackList.");
}
</script>
</body>
</html>
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