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162 lines
6.1 KiB
HTML
162 lines
6.1 KiB
HTML
<!doctype html>
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<meta charset=utf-8>
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<title>RTCPeerConnection.prototype.setRemoteDescription rollback</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="RTCPeerConnection-helper.js"></script>
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<script>
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'use strict';
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// Test is based on the following editor draft:
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// https://w3c.github.io/webrtc-pc/archives/20170605/webrtc.html
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// The following helper functions are called from RTCPeerConnection-helper.js:
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// assert_session_desc_similar
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// generateAudioReceiveOnlyOffer
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// generateDataChannelOffer
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/*
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4.3.2. Interface Definition
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[Constructor(optional RTCConfiguration configuration)]
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interface RTCPeerConnection : EventTarget {
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Promise<void> setLocalDescription(
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RTCSessionDescriptionInit description);
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readonly attribute RTCSessionDescription? localDescription;
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readonly attribute RTCSessionDescription? currentLocalDescription;
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readonly attribute RTCSessionDescription? pendingLocalDescription;
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Promise<void> setRemoteDescription(
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RTCSessionDescriptionInit description);
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readonly attribute RTCSessionDescription? remoteDescription;
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readonly attribute RTCSessionDescription? currentRemoteDescription;
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readonly attribute RTCSessionDescription? pendingRemoteDescription;
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...
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};
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4.6.2. RTCSessionDescription Class
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dictionary RTCSessionDescriptionInit {
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required RTCSdpType type;
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DOMString sdp = "";
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};
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4.6.1. RTCSdpType
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enum RTCSdpType {
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"offer",
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"pranswer",
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"answer",
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"rollback"
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};
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*/
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/*
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4.3.1.6. Set the RTCSessionSessionDescription
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2.2.3. Otherwise, if description is set as a remote description, then run one
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of the following steps:
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- If description is of type "rollback", then this is a rollback.
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Set connection.pendingRemoteDescription to null and signaling state to stable.
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*/
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promise_test(t => {
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const pc = new RTCPeerConnection();
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t.add_cleanup(() => pc.close());
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const states = [];
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pc.addEventListener('signalingstatechange', () => states.push(pc.signalingState));
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return generateDataChannelOffer(pc)
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.then(offer => pc.setRemoteDescription(offer))
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.then(() => {
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assert_equals(pc.signalingState, 'have-remote-offer');
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assert_not_equals(pc.remoteDescription, null);
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assert_not_equals(pc.pendingRemoteDescription, null);
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assert_equals(pc.currentRemoteDescription, null);
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return pc.setRemoteDescription({ type: 'rollback' });
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})
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.then(() => {
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assert_equals(pc.signalingState, 'stable');
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assert_equals(pc.remoteDescription, null);
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assert_equals(pc.pendingRemoteDescription, null);
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assert_equals(pc.currentRemoteDescription, null);
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assert_array_equals(states, ['have-remote-offer', 'stable']);
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});
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}, 'setRemoteDescription(rollback) in have-remote-offer state should revert to stable state');
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/*
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4.3.1.6. Set the RTCSessionSessionDescription
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2.3. If the description's type is invalid for the current signaling state of
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connection, then reject p with a newly created InvalidStateError and abort
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these steps.
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[jsep]
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4.1.8.2. Rollback
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- Rollback can only be used to cancel proposed changes;
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there is no support for rolling back from a stable state to a
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previous stable state
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*/
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promise_test(t => {
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const pc = new RTCPeerConnection();
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t.add_cleanup(() => pc.close());
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return promise_rejects(t, 'InvalidStateError',
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pc.setRemoteDescription({ type: 'rollback' }));
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}, `setRemoteDescription(rollback) from stable state should reject with InvalidStateError`);
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promise_test(t => {
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const pc = new RTCPeerConnection();
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t.add_cleanup(() => pc.close());
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return generateAudioReceiveOnlyOffer(pc)
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.then(offer => pc.setRemoteDescription(offer))
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.then(() => pc.setRemoteDescription({
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type: 'rollback',
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sdp: '!<Invalid SDP Content>;'
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}));
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}, `setRemoteDescription(rollback) should ignore invalid sdp content and succeed`);
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promise_test(async t => {
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const pc1 = new RTCPeerConnection();
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const pc2 = new RTCPeerConnection();
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t.add_cleanup(() => pc1.close());
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t.add_cleanup(() => pc2.close());
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// We don't use this right away
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const offer1 = await pc1.createOffer({offerToReceiveAudio: true});
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// Create offer from pc2, apply and rollback on pc1
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const offer2 = await pc2.createOffer({offerToReceiveAudio: true});
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await pc1.setRemoteDescription(offer2);
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await pc1.setRemoteDescription({type: "rollback"});
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// Then try applying pc1's old offer
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await pc1.setLocalDescription(offer1);
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}, `local offer created before setRemoteDescription(remote offer) then rollback should still be usable`);
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promise_test(async t => {
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const pc1 = new RTCPeerConnection();
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const pc2 = new RTCPeerConnection();
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t.add_cleanup(() => pc1.close());
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t.add_cleanup(() => pc2.close());
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const stream = await getNoiseStream({ video: true });
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t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
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pc1.addTrack(stream.getTracks()[0], stream);
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// We don't use this right away. pc1 has provisionally decided that the
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// (only) transceiver is bound to level 0.
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const offer1 = await pc1.createOffer();
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// Create offer from pc2, apply and rollback on pc1
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const offer2 = await pc2.createOffer({offerToReceiveAudio: true, offerToReceiveVideo: true});
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// pc1 now should change its mind about what level its video transceiver is
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// bound to. It was 0, now it is 1.
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await pc1.setRemoteDescription(offer2);
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// Rolling back should put things back the way they were.
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await pc1.setRemoteDescription({type: "rollback"});
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// Then try applying pc1's old offer
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await pc1.setLocalDescription(offer1);
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}, "local offer created before setRemoteDescription(remote offer) with different transceiver level assignments then rollback should still be usable");
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</script>
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