RTCPeerConnection-pranswer-description-types.html

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This WPT test may be referenced by the following Test IDs:
- /webrtc/RTCPeerConnection-pranswer-description-types.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>RTCPeerConnection description types across a pranswer</title>

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

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

<script src="RTCPeerConnection-helper.js"></script>

<script>

'use strict';

// webrtc-pc, set the session description, steps 5 and 6: a pranswer becomes

// the pending description with type "pranswer"; the final answer, even with

// the very same sdp, becomes the current description with type "answer", and

// moves the offer from pending to current as well.

promise_test(async t => {

  const offerer = new RTCPeerConnection();

  const answerer = new RTCPeerConnection();

  t.add_cleanup(() => {

    offerer.close();

    answerer.close();

});

  offerer.addTransceiver('audio');

  const offer = await offerer.createOffer();

  await answerer.setRemoteDescription(offer);

  const {sdp} = await answerer.createAnswer();

  await answerer.setLocalDescription({type: 'pranswer', sdp});

  assert_equals(answerer.localDescription.type, 'pranswer');

  assert_equals(answerer.pendingLocalDescription.type, 'pranswer');

  assert_equals(answerer.currentLocalDescription, null);

  assert_equals(answerer.remoteDescription.type, 'offer');

  assert_equals(answerer.pendingRemoteDescription.type, 'offer');

  assert_equals(answerer.currentRemoteDescription, null);

  await answerer.setLocalDescription({type: 'answer', sdp});

  assert_equals(answerer.localDescription.type, 'answer');

  assert_equals(answerer.currentLocalDescription.type, 'answer');

  assert_equals(answerer.pendingLocalDescription, null);

  assert_equals(answerer.remoteDescription.type, 'offer');

  assert_equals(answerer.currentRemoteDescription.type, 'offer');

  assert_equals(answerer.pendingRemoteDescription, null);

}, 'Local descriptions change type from "pranswer" to "answer" on the final ' +

   'answer');

promise_test(async t => {

  const offerer = new RTCPeerConnection();

  const answerer = new RTCPeerConnection();

  t.add_cleanup(() => {

    offerer.close();

    answerer.close();

});

  offerer.addTransceiver('audio');

  await offerer.setLocalDescription();

  await answerer.setRemoteDescription(offerer.localDescription);

  const {sdp} = await answerer.createAnswer();

  await offerer.setRemoteDescription({type: 'pranswer', sdp});

  assert_equals(offerer.remoteDescription.type, 'pranswer');

  assert_equals(offerer.pendingRemoteDescription.type, 'pranswer');

  assert_equals(offerer.currentRemoteDescription, null);

  assert_equals(offerer.localDescription.type, 'offer');

  assert_equals(offerer.pendingLocalDescription.type, 'offer');

  assert_equals(offerer.currentLocalDescription, null);

  await offerer.setRemoteDescription({type: 'answer', sdp});

  assert_equals(offerer.remoteDescription.type, 'answer');

  assert_equals(offerer.currentRemoteDescription.type, 'answer');

  assert_equals(offerer.pendingRemoteDescription, null);

  assert_equals(offerer.localDescription.type, 'offer');

  assert_equals(offerer.currentLocalDescription.type, 'offer');

  assert_equals(offerer.pendingLocalDescription, null);

}, 'Remote descriptions change type from "pranswer" to "answer" on the ' +

   'final answer');

</script>