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<!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:
// generateOffer
// assert_session_desc_equals
// test_state_change_event
/*
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();
test_state_change_event(t, pc, ['have-remote-offer', 'stable']);
return generateOffer({ data: true })
.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);
});
}, '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();
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();
return pc.createOffer({ offerToReceiveAudio: true })
.then(offer => pc.setRemoteDescription(offer))
.then(() => pc.setRemoteDescription({
type: 'rollback',
sdp: '!<Invalid SDP Content>;'
}));
}, `setRemoteDescription(rollback) should ignore invalid sdp content and succeed`);
</script>
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