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Mercurial (1aeaa33a64f9)

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<!DOCTYPE HTML>
<html>
<head>
  <script type="application/javascript" src="pc.js"></script>
</head>
<body>
<pre id="test">
<script type="application/javascript">
  createHTML({
    bug: "1017888",
    title: "Renegotiation: remove then add audio track"
  });

  runNetworkTest(function (options) {
    const test = new PeerConnectionTest(options);
    let originalTrack;
    let haveMuteEvent = new Promise(() => {});
    let haveUnmuteEvent = new Promise(() => {});
    addRenegotiation(test.chain,
      [
        function PC_REMOTE_FIND_RECEIVER(test) {
          is(test.pcRemote._pc.getReceivers().length, 1,
             "pcRemote should have one receiver");
          originalTrack = test.pcRemote._pc.getReceivers()[0].track;
        },
        function PC_LOCAL_REMOVE_AUDIO_TRACK(test) {
          return test.pcLocal.removeSender(0);
        },
        function PC_LOCAL_ADD_AUDIO_TRACK(test) {
          // The new track's pipeline will start with a packet count of
          // 0, but the remote side will keep its old pipeline and packet
          // count.
          test.pcLocal.disableRtpCountChecking = true;
          return test.pcLocal.getAllUserMediaAndAddStreams([{audio: true}]);
        },
      ],
      [
        function PC_REMOTE_WAIT_FOR_UNMUTE() {
          return haveUnmuteEvent;
        },
        function PC_REMOTE_CHECK_ADDED_TRACK(test) {
          is(test.pcRemote._pc.getTransceivers().length, 2,
              "pcRemote should have two transceivers");
          const track = test.pcRemote._pc.getTransceivers()[1].receiver.track;

          const analyser = new AudioStreamAnalyser(
              new AudioContext(), new MediaStream([track]));
          const freq = analyser.binIndexForFrequency(TEST_AUDIO_FREQ);
          return analyser.waitForAnalysisSuccess(arr => arr[freq] > 200);
        },
        function PC_REMOTE_WAIT_FOR_MUTE() {
          return haveMuteEvent;
        },
        function PC_REMOTE_CHECK_REMOVED_TRACK(test) {
          is(test.pcRemote._pc.getTransceivers().length, 2,
              "pcRemote should have two transceivers");
          const track = test.pcRemote._pc.getTransceivers()[0].receiver.track;

          const analyser = new AudioStreamAnalyser(
              new AudioContext(), new MediaStream([track]));
          const freq = analyser.binIndexForFrequency(TEST_AUDIO_FREQ);
          return analyser.waitForAnalysisSuccess(arr => arr[freq] < 50);
        }
      ]
    );

    // Second negotiation should cause the first track to mute...
    test.chain.insertBefore("PC_REMOTE_SET_REMOTE_DESCRIPTION", [
      function PC_REMOTE_SETUP_ONMUTE(test) {
        haveMuteEvent = haveEvent(test.pcRemote._pc.getReceivers()[0].track, "mute");
      }
    ], false, 1);

    // ...and a second track to unmute.
    test.chain.insertAfter("PC_REMOTE_SET_REMOTE_DESCRIPTION", [
      function PC_REMOTE_SETUP_ONUNMUTE(test) {
        haveUnmuteEvent = haveEvent(test.pcRemote._pc.getReceivers()[1].track, "unmute");
      }
    ], false, 1);

    test.setMediaConstraints([{audio: true}], [{audio: true}]);
    test.run();
  });
</script>
</pre>
</body>
</html>