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<!doctype html>
<meta charset=utf-8>
<title>RTCPeerConnection Handovers</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../RTCPeerConnection-helper.js"></script>
<script>
'use strict';
promise_test(async t => {
const offerPc = new RTCPeerConnection();
const answerPcFirst = new RTCPeerConnection();
const answerPcSecond = new RTCPeerConnection();
t.add_cleanup(() => {
offerPc.close();
answerPcFirst.close();
answerPcSecond.close();
});
offerPc.addTransceiver('audio');
// Negotiate connection with PC 1
const offer1 = await offerPc.createOffer();
await offerPc.setLocalDescription(offer1);
await answerPcFirst.setRemoteDescription(offer1);
const answer1 = await answerPcFirst.createAnswer();
await offerPc.setRemoteDescription(answer1);
await answerPcFirst.setLocalDescription(answer1);
// Renegotiate with PC 2
const offer2 = await offerPc.createOffer();
await offerPc.setLocalDescription(offer2);
await answerPcSecond.setRemoteDescription(offer2);
const answer2 = await answerPcSecond.createAnswer();
await offerPc.setRemoteDescription(answer2);
await answerPcSecond.setLocalDescription(answer2);
}, 'Negotiation of handover initiated at caller works');
promise_test(async t => {
const offerPc = new RTCPeerConnection();
const answerPcFirst = new RTCPeerConnection();
const answerPcSecond = new RTCPeerConnection();
t.add_cleanup(() => {
offerPc.close();
answerPcFirst.close();
answerPcSecond.close();
});
offerPc.addTransceiver('audio');
// Negotiate connection with PC 1
const offer1 = await offerPc.createOffer();
await offerPc.setLocalDescription(offer1);
await answerPcFirst.setRemoteDescription(offer1);
const answer1 = await answerPcFirst.createAnswer();
await offerPc.setRemoteDescription(answer1);
await answerPcFirst.setLocalDescription(answer1);
// Renegotiate with PC 2
// The offer from PC 2 needs to be consistent on at least the following:
// - Number, type and order of media sections
// - MID values
// - Payload type values
// Do a "fake" offer/answer using the original offer against PC2 to achieve this.
await answerPcSecond.setRemoteDescription(offer1);
// Discard the output of this round.
await answerPcSecond.setLocalDescription(await answerPcSecond.createAnswer());
// Now we can initiate an offer from the new PC.
const offer2 = await answerPcSecond.createOffer();
await answerPcSecond.setLocalDescription(offer2);
await offerPc.setRemoteDescription(offer2);
const answer2 = await offerPc.createAnswer();
await answerPcSecond.setRemoteDescription(answer2);
await offerPc.setLocalDescription(answer2);
}, 'Negotiation of handover initiated at callee works');
</script>
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