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The Tor Browser
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RTCPeerConnection-setRemoteDescription-answer.html (4255B)

      1 <!doctype html>
      2 <meta charset=utf-8>
      3 <title>RTCPeerConnection.prototype.setRemoteDescription - answer</title>
      4 <script src="/resources/testharness.js"></script>
      5 <script src="/resources/testharnessreport.js"></script>
      6 <script src="RTCPeerConnection-helper.js"></script>
      7 <script>
      8  'use strict';
      9 
     10  // Test is based on the following editor draft:
     11  // https://w3c.github.io/webrtc-pc/archives/20170605/webrtc.html
     12 
     13  // The following helper functions are called from RTCPeerConnection-helper.js:
     14  //   generateAnswer()
     15  //   assert_session_desc_similar()
     16 
     17  /*
     18    4.3.2.  Interface Definition
     19      [Constructor(optional RTCConfiguration configuration)]
     20      interface RTCPeerConnection : EventTarget {
     21        Promise<void>                      setRemoteDescription(
     22            RTCSessionDescriptionInit description);
     23 
     24        readonly attribute RTCSessionDescription? remoteDescription;
     25        readonly attribute RTCSessionDescription? currentRemoteDescription;
     26        readonly attribute RTCSessionDescription? pendingRemoteDescription;
     27        ...
     28      };
     29 
     30    4.6.2.  RTCSessionDescription Class
     31      dictionary RTCSessionDescriptionInit {
     32        required RTCSdpType type;
     33                 DOMString  sdp = "";
     34      };
     35 
     36    4.6.1.  RTCSdpType
     37      enum RTCSdpType {
     38        "offer",
     39        "pranswer",
     40        "answer",
     41        "rollback"
     42      };
     43   */
     44 
     45  /*
     46    4.3.1.6.  Set the RTCSessionSessionDescription
     47      2.2.3.  Otherwise, if description is set as a remote description, then run one of
     48              the following steps:
     49        - If description is of type "answer", then this completes an offer answer
     50          negotiation.
     51 
     52          Set connection's currentRemoteDescription to description and
     53          currentLocalDescription to the value of pendingLocalDescription.
     54 
     55          Set both pendingRemoteDescription and pendingLocalDescription to null.
     56 
     57          Finally setconnection's signaling state to stable.
     58   */
     59  promise_test(t => {
     60    const pc = new RTCPeerConnection();
     61    t.add_cleanup(() => pc.close());
     62 
     63    const states = [];
     64    pc.addEventListener('signalingstatechange', () => states.push(pc.signalingState));
     65 
     66    return generateVideoReceiveOnlyOffer(pc)
     67    .then(offer =>
     68      pc.setLocalDescription(offer)
     69      .then(() => generateAnswer(offer))
     70      .then(answer =>
     71        pc.setRemoteDescription(answer)
     72        .then(() => {
     73          assert_equals(pc.signalingState, 'stable');
     74 
     75          assert_session_desc_similar(pc.localDescription, offer);
     76          assert_session_desc_similar(pc.remoteDescription, answer);
     77 
     78          assert_session_desc_similar(pc.currentLocalDescription, offer);
     79          assert_session_desc_similar(pc.currentRemoteDescription, answer);
     80 
     81          assert_equals(pc.pendingLocalDescription, null);
     82          assert_equals(pc.pendingRemoteDescription, null);
     83 
     84          assert_array_equals(states, ['have-local-offer', 'stable']);
     85        })));
     86  }, 'setRemoteDescription() with valid state and answer should succeed');
     87 
     88  /*
     89    4.3.1.6.  Set the RTCSessionSessionDescription
     90      2.1.3.  If the description's type is invalid for the current signaling state of
     91              connection, then reject p with a newly created InvalidStateError and abort
     92              these steps.
     93 
     94    [JSEP]
     95      5.6.  If the type is "answer", the PeerConnection state MUST be either
     96            "have-local-offer" or "have-remote-pranswer".
     97   */
     98  promise_test(t => {
     99    const pc = new RTCPeerConnection();
    100 
    101    t.add_cleanup(() => pc.close());
    102 
    103    return pc.createOffer()
    104    .then(offer =>
    105      promise_rejects_dom(t, 'InvalidStateError',
    106        pc.setRemoteDescription({ type: 'answer', sdp: offer.sdp })));
    107  }, 'Calling setRemoteDescription(answer) from stable state should reject with InvalidStateError');
    108 
    109  promise_test(t => {
    110    const pc = new RTCPeerConnection();
    111 
    112    t.add_cleanup(() => pc.close());
    113 
    114    return pc.createOffer()
    115    .then(offer =>
    116      pc.setRemoteDescription(offer)
    117      .then(() => generateAnswer(offer)))
    118    .then(answer =>
    119      promise_rejects_dom(t, 'InvalidStateError',
    120        pc.setRemoteDescription(answer)));
    121  }, 'Calling setRemoteDescription(answer) from have-remote-offer state should reject with InvalidStateError');
    122 
    123 </script>