<!doctype html>
<html>
    <head>
        <meta charset="utf-8">
        <title>Testing audio/video element playing</title>
        <script src="../resources/testharness.js"></script>
        <script src="../resources/testharnessreport.js"></script>
    </head>
    <body>
        <audio id="audio" controls autoplay=""></audio>
        <video id="video" controls autoplay=""></video>
        <script>
promise_test(async (t) => {
    const pc1 = new RTCPeerConnection();
    const pc2 = new RTCPeerConnection();
    t.add_cleanup(() => {
        pc1.close();
        pc2.close();
    });

    const localStream = await navigator.mediaDevices.getUserMedia({ audio : true });
    pc1.addTrack(localStream.getAudioTracks()[0], localStream);
    pc1.addTransceiver("video", { streams : [localStream] });

    let promise = new Promise(resolve => pc2.ontrack = resolve);

    const offer = await pc1.createOffer();
    await pc1.setLocalDescription(offer);

    await pc2.setRemoteDescription(offer);
    const answer = await pc2.createAnswer();
    await pc2.setLocalDescription(answer);

    await pc1.setRemoteDescription(answer);

    // We do not pass any ICE candidate 
    let remoteTrackEvent = await promise;

    let remoteStream = new MediaStream([remoteTrackEvent.streams[0].getVideoTracks()[0], localStream.getAudioTracks()[0]]);
    audio.srcObject = remoteStream;
    video.srcObject = remoteStream;

    audio.play();
    video.play();

    let counter = 0;
    do {
        await new Promise(resolve => t.step_timeout(resolve, 100));
    } while (audio.currentTime === 0 && ++counter < 20)

   assert_not_equals(audio.currentTime, 0);
   assert_equals(video.currentTime, 0);
}, "Verify that, contrary to video elements, audio elements are playing even if video tracks have not started generated any video frame");
        </script>
    </body>
</html>