webrtc/RTCPeerConnection-onsignalingstatechanged.https.html

<!doctype html>
<meta charset=utf-8>
<title>RTCPeerConnection onsignalingstatechanged</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="RTCPeerConnection-helper.js"></script>
<script>

promise_test(async t => {
  const [track] = (await navigator.mediaDevices.getUserMedia({video: true})).getTracks();
  t.add_cleanup(() => track.stop());
  const pc1 = new RTCPeerConnection();
  t.add_cleanup(() => pc1.close());
  const pc2 = new RTCPeerConnection();
  t.add_cleanup(() => pc2.close());
  pc1.addTrack(track, new MediaStream());
  await pc1.setLocalDescription(await pc1.createOffer());
  await pc2.setRemoteDescription(pc1.localDescription);
  const signalingStateChangeResolver = new Resolver();
  pc2.onsignalingstatechange = t.step_func(e => {
    const transceiver = pc2.getTransceivers()[0];
    assert_equals(pc2.signalingState, "stable");
    assert_equals(transceiver.currentDirection, "recvonly");
    signalingStateChangeResolver.resolve();
  });
  await pc2.setLocalDescription(await pc2.createAnswer());
  await signalingStateChangeResolver;
});

</script>