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<!DOCTYPE HTML>
<html>
<head>
<title>Test for Bug 882677 - Implement the 'sourcing out of band text tracks' algorithm</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="auto">
<script type="text/javascript">
/**
* This test is used to ensure that we can load resource from vtt files correctly
* and will dispatch `error` event for invalid vtt files.
*/
var video = document.getElementById("v");
async function runTest() {
let tracks = createTextTrackElements();
appendTracksToVideo(tracks);
await waitUntilsTrackLoadedOrGetError(tracks);
SimpleTest.finish()
}
SimpleTest.waitForExplicitFinish();
onload = runTest;
/**
* The following are test helper functions.
*/
function createTextTrackElements() {
// Only first track has valid vtt resource, other tracks should get the error
// event because of invalid vtt resources.
let trackOne = document.createElement("track");
trackOne.src = "basic.vtt";
trackOne.kind = "subtitles";
trackOne.expectedLoaded = true;
let trackTwo = document.createElement("track");
trackTwo.src = "bad-signature.vtt";
trackTwo.kind = "captions";
trackTwo.expectedLoaded = false;
let trackThree = document.createElement("track");
trackThree.src = "bad.vtt";
trackThree.kind = "chapters";
trackThree.expectedLoaded = false;
return [trackOne, trackTwo, trackThree];
}
function appendTracksToVideo(tracks) {
for (let track of tracks) {
video.appendChild(track);
}
}
async function waitUntilsTrackLoadedOrGetError(tracks) {
let promises = [];
for (let track of tracks) {
// explictly enable those track in order to start loading.
track.track.mode = "hidden";
if (track.expectedLoaded) {
info(`adding 'load' event to wait list.`);
promises.push(once(track, "load"));
} else {
info(`adding 'error' event to wait list.`);
promises.push(once(track, "error"));
}
}
info(`wait until tracks finish loading or get error.`);
await Promise.all(promises);
ok(true, "all tracks finish loading or get error.");
}
</script>
</body>
</html>
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