gecko-dev/dom/media/tests/mochitest/test_peerConnection_callbac...

<!DOCTYPE HTML>
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<head>
  <script type="application/javascript" src="pc.js"></script>
</head>
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<pre id="test">
<script type="application/javascript;version=1.8">
  createHTML({
    title: "PeerConnection using callback functions",
    bug: "1119593",
    visible: true
  });

// This still aggressively uses promises, but it is testing that the callback functions
// are properly in place.

// wrapper that turns a callback-based function call into a promise
function pcall(o, f, beforeArg) {
  return new Promise((resolve, reject) => {
    var args = [resolve, reject];
    if (typeof beforeArg !== 'undefined') {
      args.unshift(beforeArg);
    }
    info('Calling ' + f.name);
    f.apply(o, args);
  });
}

var pc1 = new RTCPeerConnection();
var pc2 = new RTCPeerConnection();

var pc2_haveRemoteOffer = new Promise(resolve => {
  pc2.onsignalingstatechange =
    e => (e.target.signalingState == "have-remote-offer") && resolve();
});
var pc1_stable = new Promise(resolve => {
  pc1.onsignalingstatechange =
    e => (e.target.signalingState == "stable") && resolve();
});

pc1.onicecandidate = e => {
  pc2_haveRemoteOffer
    .then(() => !e.candidate || pcall(pc2, pc2.addIceCandidate, e.candidate))
    .catch(generateErrorCallback());
};
pc2.onicecandidate = e => {
  pc1_stable
    .then(() => !e.candidate || pcall(pc1, pc1.addIceCandidate, e.candidate))
    .catch(generateErrorCallback());
};

var v1, v2;
var delivered = new Promise(resolve => {
  pc2.onaddstream = e => {
    v2.mozSrcObject = e.stream;
    resolve(e.stream);
  };
});

runNetworkTest(function() {
  v1 = createMediaElement('video', 'v1');
  v2 = createMediaElement('video', 'v2');
  var canPlayThrough = new Promise(resolve => v2.canplaythrough = resolve);
  is(v2.currentTime, 0, "v2.currentTime is zero at outset");

  // not testing legacy gUM here
  navigator.mediaDevices.getUserMedia({ video: true, audio: true })
    .then(stream => pc1.addStream(v1.mozSrcObject = stream))
    .then(() => pcall(pc1, pc1.createOffer))
    .then(offer => pcall(pc1, pc1.setLocalDescription, offer))
    .then(() => pcall(pc2, pc2.setRemoteDescription, pc1.localDescription))
    .then(() => pcall(pc2, pc2.createAnswer))
    .then(answer => pcall(pc2, pc2.setLocalDescription, answer))
    .then(() => pcall(pc1, pc1.setRemoteDescription, pc2.localDescription))
    .then(() => delivered)
  //    .then(() => canPlayThrough)    // why doesn't this fire?
    .then(() => waitUntil(() => v2.currentTime > 0 && v2.mozSrcObject.currentTime > 0))
    .then(() => ok(v2.currentTime > 0, "v2.currentTime is moving (" + v2.currentTime + ")"))
    .then(() => ok(true, "Connected."))
    .then(() => pcall(pc1, pc1.getStats, null))
    .then(stats => ok(Object.keys(stats).length > 0, "pc1 has stats"))
    .then(() => pcall(pc2, pc2.getStats, null))
    .then(stats => ok(Object.keys(stats).length > 0, "pc2 has stats"))
    .then(() => { v1.pause(); v2.pause(); })
    .catch(reason => ok(false, "unexpected failure: " + reason))
      .then(networkTestFinished);
});
</script>
</pre>
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