RTCPeerConnection-SLD-SRD-timing.https.html

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This WPT test may be referenced by the following Test IDs:
- /webrtc/RTCPeerConnection-SLD-SRD-timing.https.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<meta name="timeout" content="long">

<title></title>

<script src=/resources/testharness.js></script>

<script src=/resources/testharnessreport.js></script>

<script>

'use strict';

promise_test(async t => {

  const pc = new RTCPeerConnection();

  t.add_cleanup(() => pc.close());

  const signalingStates = [];

  pc.onsignalingstatechange = ev => signalingStates.push(pc.signalingState);

  pc.addTransceiver('audio', {direction:'recvonly'});

  const offer = await pc.createOffer();

  const sldPromise = pc.setLocalDescription(offer);

  const srdPromise = pc.setRemoteDescription(offer);

  await Promise.all([sldPromise, srdPromise]);

  assert_array_equals(signalingStates,

                      ['have-local-offer','stable','have-remote-offer']);

}, 'setLocalDescription and setRemoteDescription are not racy');

</script>