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RTCPeerConnection-setRemoteDescription-pranswer.html
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RTCPeerConnection-setRemoteDescription-pranswer.html
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<!doctype html>
<meta charset=utf-8>
<title>RTCPeerConnection.prototype.setRemoteDescription pranswer</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
// generateAnswer
// assert_session_desc_similar
/*
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
2.1.3. 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]
5.6. If the type is "pranswer" or "answer", the PeerConnection state MUST be either
"have-local-offer" or "have-remote-pranswer".
*/
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.createOffer()
.then(offer =>
promise_rejects(t, 'InvalidStateError',
pc.setRemoteDescription({ type: 'pranswer', sdp: offer.sdp })));
}, 'setRemoteDescription(pranswer) from stable state should reject with InvalidStateError');
/*
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 "pranswer", then set
connection.pendingRemoteDescription to description and signaling state
to have-remote-pranswer.
*/
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const states = [];
pc.addEventListener('signalingstatechange', () => states.push(pc.signalingState));
return pc.createOffer({ offerToReceiveVideo: true })
.then(offer =>
pc.setLocalDescription(offer)
.then(() => generateAnswer(offer))
.then(answer => {
const pranswer = { type: 'pranswer', sdp: answer.sdp };
return pc.setRemoteDescription(pranswer)
.then(() => {
assert_equals(pc.signalingState, 'have-remote-pranswer');
assert_session_desc_similar(pc.localDescription, offer);
assert_session_desc_similar(pc.pendingLocalDescription, offer);
assert_equals(pc.currentLocalDescription, null);
assert_session_desc_similar(pc.remoteDescription, pranswer);
assert_session_desc_similar(pc.pendingRemoteDescription, pranswer);
assert_equals(pc.currentRemoteDescription, null);
assert_array_equals(states, ['have-local-offer', 'have-remote-pranswer']);
});
}));
}, 'setRemoteDescription(pranswer) from have-local-offer state should succeed');
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const states = [];
pc.addEventListener('signalingstatechange', () => states.push(pc.signalingState));
return pc.createOffer({ offerToReceiveVideo: true })
.then(offer =>
pc.setLocalDescription(offer)
.then(() => generateAnswer(offer))
.then(answer => {
const pranswer = { type: 'pranswer', sdp: answer.sdp };
return pc.setRemoteDescription(pranswer)
.then(() => pc.setRemoteDescription(pranswer))
.then(() => {
assert_array_equals(states, ['have-local-offer', 'have-remote-pranswer']);
});
}));
}, 'setRemoteDescription(pranswer) multiple times should succeed');
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const states = [];
pc.addEventListener('signalingstatechange', () => states.push(pc.signalingState));
return pc.createOffer({ offerToReceiveVideo: true })
.then(offer =>
pc.setLocalDescription(offer)
.then(() => generateAnswer(offer))
.then(answer => {
const pranswer = { type: 'pranswer', sdp: answer.sdp };
return pc.setRemoteDescription(pranswer)
.then(() => pc.setRemoteDescription(answer))
.then(() => {
assert_equals(pc.signalingState, 'stable');
assert_session_desc_similar(pc.localDescription, offer);
assert_session_desc_similar(pc.currentLocalDescription, offer);
assert_equals(pc.pendingLocalDescription, null);
assert_session_desc_similar(pc.remoteDescription, answer);
assert_session_desc_similar(pc.currentRemoteDescription, answer);
assert_equals(pc.pendingRemoteDescription, null);
assert_array_equals(states, ['have-local-offer', 'have-remote-pranswer', 'stable']);
});
}));
}, 'setRemoteDescription(answer) from have-remote-pranswer state should succeed');
</script>