mozilla-release/dom/media/tests/mochitest/test_peerConnection_setLocalAnswerInStable.html

﻿<!DOCTYPE HTML>
<html>
<head>
  <script type="application/javascript" src="pc.js"></script>
</head>
<body>
<pre id="test">
<script type="application/javascript">
  createHTML({
    bug: "784519",
    title: "setLocalDescription (answer) in 'stable'"
  });

runNetworkTest(function () {
  var test = new PeerConnectionTest();
  test.setMediaConstraints([{audio: true}], [{audio: true}]);
  test.chain.removeAfter("PC_LOCAL_CREATE_OFFER");

  test.chain.append([
    function PC_LOCAL_SET_LOCAL_ANSWER(test) {
      test.pcLocal._latest_offer.type = "answer";
      return test.pcLocal.setLocalDescriptionAndFail(test.pcLocal._latest_offer)
        .then(err => {
          is(err.name, "InvalidModificationError", "Error is InvalidModificationError");
        });
    }
  ]);

  test.run();
});
</script>
</pre>
</body>
</html>