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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:
+ // 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_dom(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 generateVideoReceiveOnlyOffer(pc)
+ .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 generateVideoReceiveOnlyOffer(pc)
+ .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 generateVideoReceiveOnlyOffer(pc)
+ .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>