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<title>RTCPeerConnection.prototype.iceConnectionState - disconnection</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 caller = new RTCPeerConnection();
t.add_cleanup(() => caller.close());
const callee = new RTCPeerConnection();
t.add_cleanup(() => callee.close());
const stream = await getNoiseStream({audio:true});
t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
const [track] = stream.getTracks();
caller.addTrack(track, stream);
exchangeIceCandidates(caller, callee);
await exchangeOfferAnswer(caller, callee);
await listenToIceConnected(caller);
callee.close();
await waitForIceStateChange(caller, ['disconnected', 'failed']);
// TODO: this should eventually transition to failed but that takes
// somewhat long (15-30s) so is not testable.
}, 'ICE goes to disconnected if the other side goes away');
promise_test(async t => {
const caller = new RTCPeerConnection();
t.add_cleanup(() => caller.close());
const callee = new RTCPeerConnection();
t.add_cleanup(() => callee.close());
caller.addTransceiver('audio', {direction: 'sendrecv'});
exchangeIceCandidates(caller, callee);
await exchangeOfferAnswer(caller, callee);
await listenToIceConnected(caller);
// Now, we pull a fast one, and convince callee to abandon the transport
// without telling caller.
await caller.setLocalDescription();
await callee.setRemoteDescription(caller.localDescription);
const staleAnswer = await callee.createAnswer();
await callee.setRemoteDescription({type: 'rollback', sdp: ''});
const mlineRegex = /m=audio [0-9]+ /;
const mungedOfferSdp = caller.localDescription.sdp
.replace(mlineRegex, 'm=audio 0 ')
.replace('BUNDLE', 'BUNGLE'); // Avoid "But that mid is rejected!" errors
// callee gets the munged reoffer with a rejected m-section, caller gets a
// stale answer that was made before callee saw the rejected m-section.
await callee.setRemoteDescription({type: 'offer', sdp: mungedOfferSdp});
await callee.setLocalDescription();
await caller.setRemoteDescription(staleAnswer);
assert_equals(await nextIceConnectionState(caller), 'disconnected');
// Now, let's fix this with an ICE restart! callee has already negotiated
// a rejection of the first m-section, so it will tolerate it being
// revived.
caller.restartIce();
await caller.setLocalDescription();
await callee.setRemoteDescription(caller.localDescription);
await callee.setLocalDescription();
await caller.setRemoteDescription(callee.localDescription);
assert_equals(await nextIceConnectionState(caller), 'checking');
assert_equals(await nextIceConnectionState(caller), 'connected');
}, 'ICE restart when ICE is disconnected results in checking, then connected');
</script>
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