test_enumerateDevices_iframe.html

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<!DOCTYPE HTML>

<html>

<body>

<pre id="test">

<script type="application/javascript">

/**

  Runs inside iframe in test_enumerateDevices.html.

*/

const pushPrefs = (...p) => SpecialPowers.pushPrefEnv({set: p});

const gUM = c => navigator.mediaDevices.getUserMedia(c);

(async () => {

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

  // Validate enumerated devices after gUM.

  for (const track of (await gUM({video: true, audio: true})).getTracks()) {

    track.stop();

  const devices = await navigator.mediaDevices.enumerateDevices();

  parent.postMessage(JSON.stringify(devices), "https://example.com:443");

})().catch(e => setTimeout(() => { throw e; }));

</script>

</pre>

</body>

</html>