test_peerConnection_replaceNullTrackThenRenegotiateAudio.html

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<!DOCTYPE HTML>

<html>

<head>

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

  <script type="application/javascript" src="/tests/dom/canvas/test/captureStream_common.js"></script>

<body>

<pre id="test">

<script type="application/javascript">

  createHTML({

    bug: "1763832",

    title: "Renegotiation (audio): Start with no track and recvonly, then replace and set direction to sendrecv, then renegotiate"

});

  runNetworkTest(async () => {

    await pushPrefs(

      ['media.audio_loopback_dev', ''],

      ['media.navigator.streams.fake', true]);

    const offerer = new RTCPeerConnection();

    const answerer = new RTCPeerConnection();

    const transceiverSend = offerer.addTransceiver('audio', {direction: 'recvonly'});

    const add = (pc, can, failed) => can && pc.addIceCandidate(can).catch(failed);

    offerer.onicecandidate = e => add(answerer, e.candidate, generateErrorCallback());

    answerer.onicecandidate = e => add(offerer, e.candidate, generateErrorCallback());

    await offerer.setLocalDescription();

    await answerer.setRemoteDescription(offerer.localDescription);

    await answerer.setLocalDescription();

    await offerer.setRemoteDescription(answerer.localDescription);

    // add audio with replaceTrack, set send bit, and renegotiate

    const stream = await navigator.mediaDevices.getUserMedia({audio: true});

    const [track] = stream.getAudioTracks();

    transceiverSend.sender.replaceTrack(track);

    transceiverSend.direction = "sendrecv";

    const remoteStreamAvailable = new Promise(r => {

      answerer.ontrack = ({track}) => r(new MediaStream([track]));

});

    await offerer.setLocalDescription();

    await answerer.setRemoteDescription(offerer.localDescription);

    await answerer.setLocalDescription();

    await offerer.setRemoteDescription(answerer.localDescription);

    const remoteStream = await remoteStreamAvailable;

    const h = new AudioStreamFlowingHelper();

    await h.checkAudioFlowing(remoteStream);

});

</script>

</pre>

</body>

</html>