test_getUserMedia_trackCloneCleanup.html

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<!DOCTYPE HTML>

<html>

<head>

  <script type="application/javascript" src="mediaStreamPlayback.js"></script>

</head>

<body>

<pre id="test">

<script type="application/javascript">

  "use strict";

  createHTML({

    title: "Stopping a MediaStreamTrack and its clones should deallocate the device",

    bug: "1294605"

});

  runTest(async () => {

    await pushPrefs(["media.navigator.permission.fake", true]);

    const stream = await getUserMedia({audio: true, video: true, fake: true});

    const clone = stream.clone();

    stream.getTracks().forEach(t => t.stop());

    stream.clone().getTracks().forEach(t => stream.addTrack(t));

    is(stream.getTracks().filter(t => t.readyState == "live").length, 0,

       "Cloning ended tracks should make them ended");

    [...stream.getTracks(), ...clone.getTracks()].forEach(t => t.stop());

    // Bug 1295352: better to be explicit about noGum here wrt future refactoring.

    return noGum();

});

</script>

</pre>

</body>

</html>