test_setSinkId.html

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<!DOCTYPE HTML>

<html>

<head>

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

</head>

<body>

<pre id="test">

<script>

  createHTML({

    title: "SetSinkId in HTMLMediaElement",

    bug: "934425",

});

  const memoryReportPath = 'explicit/media/media-manager-aggregates';

/**

   * Run a test to verify set sink id in audio element.

*/

  runTest(async () => {

    await pushPrefs(["media.setsinkid.enabled", true]);

    if (!SpecialPowers.getCharPref("media.audio_loopback_dev", "")) {

      ok(false, "No loopback device set by framework. Try --use-test-media-devices");

      return;

    // Expose an audio output device.

    SpecialPowers.wrap(document).notifyUserGestureActivation();

    await navigator.mediaDevices.selectAudioOutput();

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

    const audioDevices = allDevices.filter(({kind}) => kind == 'audiooutput');

    is(audioDevices.length, 1, "Number of output devices found");

    const audio = createMediaElement("audio", "audio");

    document.body.appendChild(audio);

    is(audio.sinkId, "", "Initial value is empty string");

    const p = audio.setSinkId(audioDevices[0].deviceId);

    is(audio.sinkId, "", "Value is unchanged upon function return");

    is(await p, undefined, "promise resolves with undefined");

    is(audio.sinkId, audioDevices[0].deviceId, `Sink device is set, id: ${audio.sinkId}`);

    await audio.setSinkId(audioDevices[0].deviceId);

    ok(true, `Sink device is set for 2nd time for the same id: ${audio.sinkId}`);

    try {

      await audio.setSinkId("dummy sink id");

      ok(false, "Never enter here, this must fail");

    } catch (error) {

      ok(true, `Set sink id expected to fail: ${error}`);

      is(error.name, "NotFoundError", "Verify correct error");

    const {usage: usage1} =

          await collectMemoryUsage(memoryReportPath); // Provided by head.js

    ok(usage1 > 0, "MediaManager memory usage should be non-zero to store \

device ids after enumerateDevices");

    const p2 = audio.setSinkId("");

    is(audio.sinkId, audioDevices[0].deviceId,

       'sinkId after setSinkId("") return');

    is(await p2, undefined,

       "promise resolution value when sinkId parameter is empty");

    is(audio.sinkId, "", 'sinkId after setSinkId("") resolution');

    await audio.setSinkId(audioDevices[0].deviceId);

    const {usage: usage2, reportCount} =

          await collectMemoryUsage(memoryReportPath);

    is(reportCount, 1,

       'Expect only one MediaManager to report in content processes.');

    is(usage2, usage1, "MediaManager memory usage should return to previous \

value after promise resolution");

});

</script>

</pre>

</body>

</html>