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https://github.com/web-platform-tests/wpt
26 December 2018, 22:31:15 UTC
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Tip revision: cafaab17fb276177303ea7baec5b070f7989c21e authored by Anne van Kesteren on 20 March 2018, 14:55:59 UTC
Add HTMLOrSVGElement to HTML's IDL
Tip revision: cafaab1
RTCPeerConnection-setLocalDescription-offer.html 
<!doctype html>
<meta charset=utf-8>
<title>RTCPeerConnection.prototype.setLocalDescription</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="RTCPeerConnection-helper.js"></script>
<script>
  'use strict';

  // Test is based on the following editor draft:
  // https://w3c.github.io/webrtc-pc/archives/20170605/webrtc.html

  // The following helper functions are called from RTCPeerConnection-helper.js:
  //   generateOffer
  //   assert_session_desc_not_equals
  //   assert_session_desc_equals
  //   test_state_change_event

  /*
    4.3.2.  Interface Definition
      [Constructor(optional RTCConfiguration configuration)]
      interface RTCPeerConnection : EventTarget {
        Promise<void>                      setRemoteDescription(
            RTCSessionDescriptionInit description);

        readonly attribute RTCSessionDescription? remoteDescription;
        readonly attribute RTCSessionDescription? currentRemoteDescription;
        readonly attribute RTCSessionDescription? pendingRemoteDescription;
        ...
      };

    4.6.2.  RTCSessionDescription Class
      dictionary RTCSessionDescriptionInit {
        required RTCSdpType type;
                 DOMString  sdp = "";
      };

    4.6.1.  RTCSdpType
      enum RTCSdpType {
        "offer",
        "pranswer",
        "answer",
        "rollback"
      };
   */

  /*
    4.3.2.  setLocalDescription
      2.  Let lastOffer be the result returned by the last call to createOffer.
      5.  If description.sdp is null and description.type is offer, set description.sdp
          to lastOffer.

    4.3.1.6.  Set the RTCSessionSessionDescription
      2.2.2.  If description is set as a local description, then run one of the following
              steps:
        - If description is of type "offer", set connection.pendingLocalDescription
          to description and signaling state to have-local-offer.
   */
  promise_test(t => {
    const pc = new RTCPeerConnection();
    test_state_change_event(t, pc, ['have-local-offer']);

    return pc.createOffer({ offerToReceiveAudio: true })
    .then(offer =>
      pc.setLocalDescription(offer)
      .then(() => {
        assert_equals(pc.signalingState, 'have-local-offer');
        assert_session_desc_equals(pc.localDescription, offer);
        assert_session_desc_equals(pc.pendingLocalDescription, offer);
        assert_equals(pc.currentLocalDescription, null);
      }));
  }, 'setLocalDescription with valid offer should succeed');

  /*
    4.3.2.  setLocalDescription
      2.  Let lastOffer be the result returned by the last call to createOffer.
      5.  If description.sdp is null and description.type is offer, set description.sdp
          to lastOffer.
   */
  promise_test(t => {
    const pc = new RTCPeerConnection();
    return pc.createOffer({ offerToReceiveAudio: true })
    .then(offer =>
      pc.setLocalDescription({ type: 'offer' })
      .then(() => {
        assert_equals(pc.signalingState, 'have-local-offer');
        assert_session_desc_equals(pc.localDescription, offer);
        assert_session_desc_equals(pc.pendingLocalDescription, offer);
        assert_equals(pc.currentLocalDescription, null);
      }));
  }, 'setLocalDescription with type offer and null sdp should use lastOffer generated from createOffer');

  /*
    4.3.2.  setLocalDescription
      2.  Let lastOffer be the result returned by the last call to createOffer.
      6.  If description.type is offer and description.sdp does not match lastOffer,
          reject the promise with a newly created InvalidModificationError and abort
          these steps.
   */
  promise_test(t => {
    const pc = new RTCPeerConnection();

    return generateOffer({ pc, data: true })
    .then(offer =>
      promise_rejects(t, 'InvalidModificationError',
        pc.setLocalDescription(offer)));
  }, 'setLocalDescription() with offer not created by own createOffer() should reject with InvalidModificationError');

  promise_test(t => {
    // Create first offer with audio line, then second offer with
    // both audio and video line. Since the second offer is the
    // last offer, setLocalDescription would reject when setting
    // with the first offer
    const pc = new RTCPeerConnection();
    return pc.createOffer({ offerToReceiveAudio: true })
    .then(offer1 =>
      pc.createOffer({ offerToReceiveVideo: true })
      .then(offer2 => {
        assert_session_desc_not_equals(offer1, offer2);
        return promise_rejects(t, 'InvalidModificationError',
          pc.setLocalDescription(offer1));
      }));
  }, 'Set created offer other than last offer should reject with InvalidModificationError');

  promise_test(t => {
    const pc = new RTCPeerConnection();

    // Only one state change event should be fired
    test_state_change_event(t, pc, ['have-local-offer']);

    return pc.createOffer({ offerToReceiveAudio: true })
    .then(offer1 =>
      pc.setLocalDescription(offer1)
      .then(() =>
        pc.createOffer({ offerToReceiveVideo: true })
        .then(offer2 =>
          pc.setLocalDescription(offer2)
          .then(offer2 => {
            assert_session_desc_not_equals(offer1, offer2);
            assert_equals(pc.signalingState, 'have-local-offer');
            assert_session_desc_equals(pc.localDescription, offer2);
            assert_session_desc_equals(pc.pendingLocalDescription, offer2);
            assert_equals(pc.currentLocalDescription, null);
          }))));
  }, 'Creating and setting offer multiple times should succeed');

</script>
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