LayoutTests/media/now-playing-status-for-video-conference-web-page.html

<!doctype html>
<html>
    <head>
        <meta charset="utf-8">
        <script src="../resources/testharness.js"></script>
        <script src="../resources/testharnessreport.js"></script>
        <script src="../webrtc/routines.js"></script>
    </head>
    <body>
        <video id="localVideo" autoplay playsinline muted></video>
        <video id="remoteVideo" autoplay playsinline></video>
        <script>
promise_test(async (t) => {
    const localStream = await navigator.mediaDevices.getUserMedia({audio: true, video: true});
    localVideo.srcObject = localStream;
    await localVideo.play();

    const remoteStream = await new Promise((resolve, reject) => {
        createConnections((firstConnection) => {
            firstConnection.addTrack(localStream.getVideoTracks()[0], localStream);
            firstConnection.addTrack(localStream.getAudioTracks()[0], localStream);
        }, (secondConnection) => {
            pc2 = secondConnection;
            secondConnection.ontrack = (trackEvent) => {
                resolve(trackEvent.streams[0]);
            };
        });
        setTimeout(() => reject("Test timed out"), 5000);
    });

    remoteVideo.srcObject = remoteStream;
    await remoteVideo.play();

    if (!window.internals)
        return;

    await new Promise(resolve => setTimeout(resolve, 500));
    assert_false(internals.nowPlayingState.haveEverRegisteredAsNowPlayingApplication);

    internals.setMediaStreamTrackMuted(localStream.getAudioTracks()[0], false); 
    internals.setMediaStreamTrackMuted(localStream.getVideoTracks()[0], false); 

    await new Promise(resolve => setTimeout(resolve, 500));
    assert_false(internals.nowPlayingState.haveEverRegisteredAsNowPlayingApplication);
}, "Check NowPlaying status on a VC page");
        </script>
    </body>
</html>