| <!doctype html> |
| <meta charset=utf-8> |
| <title>RTCPeerConnection.prototype.setRemoteDescription rollback</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: |
| // assert_session_desc_similar |
| // generateAudioReceiveOnlyOffer |
| // generateDataChannelOffer |
| |
| /* |
| 4.3.2. Interface Definition |
| [Constructor(optional RTCConfiguration configuration)] |
| interface RTCPeerConnection : EventTarget { |
| Promise<void> setLocalDescription( |
| RTCSessionDescriptionInit description); |
| |
| readonly attribute RTCSessionDescription? localDescription; |
| readonly attribute RTCSessionDescription? currentLocalDescription; |
| readonly attribute RTCSessionDescription? pendingLocalDescription; |
| |
| 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" |
| }; |
| */ |
| |
| /* |
| 4.3.1.6. Set the RTCSessionSessionDescription |
| 2.2.3. Otherwise, if description is set as a remote description, then run one |
| of the following steps: |
| - If description is of type "rollback", then this is a rollback. |
| Set connection.pendingRemoteDescription to null and signaling state to stable. |
| */ |
| promise_test(t => { |
| const pc = new RTCPeerConnection(); |
| t.add_cleanup(() => pc.close()); |
| |
| const states = []; |
| pc.addEventListener('signalingstatechange', () => states.push(pc.signalingState)); |
| |
| return generateDataChannelOffer(pc) |
| .then(offer => pc.setRemoteDescription(offer)) |
| .then(() => { |
| assert_equals(pc.signalingState, 'have-remote-offer'); |
| assert_not_equals(pc.remoteDescription, null); |
| assert_not_equals(pc.pendingRemoteDescription, null); |
| assert_equals(pc.currentRemoteDescription, null); |
| |
| return pc.setRemoteDescription({ type: 'rollback' }); |
| }) |
| .then(() => { |
| assert_equals(pc.signalingState, 'stable'); |
| assert_equals(pc.remoteDescription, null); |
| assert_equals(pc.pendingRemoteDescription, null); |
| assert_equals(pc.currentRemoteDescription, null); |
| |
| assert_array_equals(states, ['have-remote-offer', 'stable']); |
| }); |
| }, 'setRemoteDescription(rollback) in have-remote-offer state should revert to stable state'); |
| |
| /* |
| 4.3.1.6. Set the RTCSessionSessionDescription |
| 2.3. If the description's type is invalid for the current signaling state of |
| connection, then reject p with a newly created InvalidStateError and abort |
| these steps. |
| |
| [jsep] |
| 4.1.8.2. Rollback |
| - Rollback can only be used to cancel proposed changes; |
| there is no support for rolling back from a stable state to a |
| previous stable state |
| */ |
| promise_test(t => { |
| const pc = new RTCPeerConnection(); |
| t.add_cleanup(() => pc.close()); |
| return promise_rejects(t, 'InvalidStateError', |
| pc.setRemoteDescription({ type: 'rollback' })); |
| }, `setRemoteDescription(rollback) from stable state should reject with InvalidStateError`); |
| |
| promise_test(t => { |
| const pc = new RTCPeerConnection(); |
| t.add_cleanup(() => pc.close()); |
| return generateAudioReceiveOnlyOffer(pc) |
| .then(offer => pc.setRemoteDescription(offer)) |
| .then(() => pc.setRemoteDescription({ |
| type: 'rollback', |
| sdp: '!<Invalid SDP Content>;' |
| })); |
| }, `setRemoteDescription(rollback) should ignore invalid sdp content and succeed`); |
| |
| promise_test(async t => { |
| const pc1 = new RTCPeerConnection(); |
| const pc2 = new RTCPeerConnection(); |
| t.add_cleanup(() => pc1.close()); |
| t.add_cleanup(() => pc2.close()); |
| |
| // We don't use this right away |
| const offer1 = await pc1.createOffer({offerToReceiveAudio: true}); |
| |
| // Create offer from pc2, apply and rollback on pc1 |
| const offer2 = await pc2.createOffer({offerToReceiveAudio: true}); |
| await pc1.setRemoteDescription(offer2); |
| await pc1.setRemoteDescription({type: "rollback"}); |
| |
| // Then try applying pc1's old offer |
| await pc1.setLocalDescription(offer1); |
| }, `local offer created before setRemoteDescription(remote offer) then rollback should still be usable`); |
| |
| </script> |
