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diff --git a/testing/web-platform/tests/webrtc/RTCRtpTransceiver.https.html b/testing/web-platform/tests/webrtc/RTCRtpTransceiver.https.html
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+++ b/testing/web-platform/tests/webrtc/RTCRtpTransceiver.https.html
@@ -0,0 +1,2297 @@
+<!doctype html>
+<meta charset=utf-8>
+<meta name="timeout" content="long">
+<title>RTCRtpTransceiver</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="RTCPeerConnection-helper.js"></script>
+<script>
+ 'use strict';
+
+ const checkThrows = async (func, exceptionName, description) => {
+ try {
+ await func();
+ assert_true(false, description + " throws " + exceptionName);
+ } catch (e) {
+ assert_equals(e.name, exceptionName, description + " throws " + exceptionName);
+ }
+ };
+
+ const stopTracks = (...streams) => {
+ streams.forEach(stream => stream.getTracks().forEach(track => track.stop()));
+ };
+
+ const collectEvents = (target, name, check) => {
+ const events = [];
+ const handler = e => {
+ check(e);
+ events.push(e);
+ };
+
+ target.addEventListener(name, handler);
+
+ const finishCollecting = () => {
+ target.removeEventListener(name, handler);
+ return events;
+ };
+
+ return {finish: finishCollecting};
+ };
+
+ const collectAddTrackEvents = stream => {
+ const checkEvent = e => {
+ assert_true(e.track instanceof MediaStreamTrack, "Track is set on event");
+ assert_true(stream.getTracks().includes(e.track),
+ "track in addtrack event is in the stream");
+ };
+ return collectEvents(stream, "addtrack", checkEvent);
+ };
+
+ const collectRemoveTrackEvents = stream => {
+ const checkEvent = e => {
+ assert_true(e.track instanceof MediaStreamTrack, "Track is set on event");
+ assert_true(!stream.getTracks().includes(e.track),
+ "track in removetrack event is not in the stream");
+ };
+ return collectEvents(stream, "removetrack", checkEvent);
+ };
+
+ const collectTrackEvents = pc => {
+ const checkEvent = e => {
+ assert_true(e.track instanceof MediaStreamTrack, "Track is set on event");
+ assert_true(e.receiver instanceof RTCRtpReceiver, "Receiver is set on event");
+ assert_true(e.transceiver instanceof RTCRtpTransceiver, "Transceiver is set on event");
+ assert_true(Array.isArray(e.streams), "Streams is set on event");
+ e.streams.forEach(stream => {
+ assert_true(stream.getTracks().includes(e.track),
+ "Each stream in event contains the track");
+ });
+ assert_equals(e.receiver, e.transceiver.receiver,
+ "Receiver belongs to transceiver");
+ assert_equals(e.track, e.receiver.track,
+ "Track belongs to receiver");
+ };
+
+ return collectEvents(pc, "track", checkEvent);
+ };
+
+ const setRemoteDescriptionReturnTrackEvents = async (pc, desc) => {
+ const trackEventCollector = collectTrackEvents(pc);
+ await pc.setRemoteDescription(desc);
+ return trackEventCollector.finish();
+ };
+
+ const offerAnswer = async (offerer, answerer) => {
+ const offer = await offerer.createOffer();
+ await answerer.setRemoteDescription(offer);
+ await offerer.setLocalDescription(offer);
+ const answer = await answerer.createAnswer();
+ await offerer.setRemoteDescription(answer);
+ await answerer.setLocalDescription(answer);
+ };
+
+ const trickle = (t, pc1, pc2) => {
+ pc1.onicecandidate = t.step_func(async e => {
+ try {
+ await pc2.addIceCandidate(e.candidate);
+ } catch (e) {
+ assert_true(false, "addIceCandidate threw error: " + e.name);
+ }
+ });
+ };
+
+ const iceConnected = pc => {
+ return new Promise((resolve, reject) => {
+ const iceCheck = () => {
+ if (pc.iceConnectionState == "connected") {
+ assert_true(true, "ICE connected");
+ resolve();
+ }
+
+ if (pc.iceConnectionState == "failed") {
+ assert_true(false, "ICE failed");
+ reject();
+ }
+ };
+
+ iceCheck();
+ pc.oniceconnectionstatechange = iceCheck;
+ });
+ };
+
+ const negotiationNeeded = pc => {
+ return new Promise(resolve => pc.onnegotiationneeded = resolve);
+ };
+
+ const countEvents = (target, name) => {
+ const result = {count: 0};
+ target.addEventListener(name, e => result.count++);
+ return result;
+ };
+
+ const gotMuteEvent = async track => {
+ await new Promise(r => track.addEventListener("mute", r, {once: true}));
+
+ assert_true(track.muted, "track should be muted after onmute");
+ };
+
+ const gotUnmuteEvent = async track => {
+ await new Promise(r => track.addEventListener("unmute", r, {once: true}));
+
+ assert_true(!track.muted, "track should not be muted after onunmute");
+ };
+
+ // comparable() - produces copy of object that is JSON comparable.
+ // o = original object (required)
+ // t = template of what to examine. Useful if o is non-enumerable (optional)
+
+ const comparable = (o, t = o) => {
+ if (typeof o != 'object' || !o) {
+ return o;
+ }
+ if (Array.isArray(t) && Array.isArray(o)) {
+ return o.map((n, i) => comparable(n, t[i]));
+ }
+ return Object.keys(t).sort()
+ .reduce((r, key) => (r[key] = comparable(o[key], t[key]), r), {});
+ };
+
+ const stripKeyQuotes = s => s.replace(/"(\w+)":/g, "$1:");
+
+ const hasProps = (observed, expected) => {
+ const observable = comparable(observed, expected);
+ assert_equals(stripKeyQuotes(JSON.stringify(observable)),
+ stripKeyQuotes(JSON.stringify(comparable(expected))));
+ };
+
+ const hasPropsAndUniqueMids = (observed, expected) => {
+ hasProps(observed, expected);
+
+ const mids = [];
+ observed.forEach((transceiver, i) => {
+ if (!("mid" in expected[i])) {
+ assert_not_equals(transceiver.mid, null);
+ assert_equals(typeof transceiver.mid, "string");
+ }
+ if (transceiver.mid) {
+ assert_false(mids.includes(transceiver.mid), "mid must be unique");
+ mids.push(transceiver.mid);
+ }
+ });
+ };
+
+ const checkAddTransceiverNoTrack = async t => {
+ const pc = new RTCPeerConnection();
+ t.add_cleanup(() => pc.close());
+
+ hasProps(pc.getTransceivers(), []);
+
+ pc.addTransceiver("audio");
+ pc.addTransceiver("video");
+
+ hasProps(pc.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio", readyState: "live", muted: true}},
+ sender: {track: null},
+ direction: "sendrecv",
+ mid: null,
+ currentDirection: null,
+ },
+ {
+ receiver: {track: {kind: "video", readyState: "live", muted: true}},
+ sender: {track: null},
+ direction: "sendrecv",
+ mid: null,
+ currentDirection: null,
+ }
+ ]);
+ };
+
+ const checkAddTransceiverWithTrack = async t => {
+ const pc = new RTCPeerConnection();
+ t.add_cleanup(() => pc.close());
+
+ const stream = await getNoiseStream({audio: true, video: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const audio = stream.getAudioTracks()[0];
+ const video = stream.getVideoTracks()[0];
+
+ pc.addTransceiver(audio);
+ pc.addTransceiver(video);
+
+ hasProps(pc.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: audio},
+ direction: "sendrecv",
+ mid: null,
+ currentDirection: null,
+ },
+ {
+ receiver: {track: {kind: "video"}},
+ sender: {track: video},
+ direction: "sendrecv",
+ mid: null,
+ currentDirection: null,
+ }
+ ]);
+ };
+
+ const checkAddTransceiverWithAddTrack = async t => {
+ const pc = new RTCPeerConnection();
+ t.add_cleanup(() => pc.close());
+
+ const stream = await getNoiseStream({audio: true, video: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const audio = stream.getAudioTracks()[0];
+ const video = stream.getVideoTracks()[0];
+
+ pc.addTrack(audio, stream);
+ pc.addTrack(video, stream);
+
+ hasProps(pc.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: audio},
+ direction: "sendrecv",
+ mid: null,
+ currentDirection: null,
+ },
+ {
+ receiver: {track: {kind: "video"}},
+ sender: {track: video},
+ direction: "sendrecv",
+ mid: null,
+ currentDirection: null,
+ }
+ ]);
+ };
+
+ const checkAddTransceiverWithDirection = async t => {
+ const pc = new RTCPeerConnection();
+ t.add_cleanup(() => pc.close());
+
+ pc.addTransceiver("audio", {direction: "recvonly"});
+ pc.addTransceiver("video", {direction: "recvonly"});
+
+ hasProps(pc.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: null},
+ direction: "recvonly",
+ mid: null,
+ currentDirection: null,
+ },
+ {
+ receiver: {track: {kind: "video"}},
+ sender: {track: null},
+ direction: "recvonly",
+ mid: null,
+ currentDirection: null,
+ }
+ ]);
+ };
+
+ const checkAddTransceiverWithSetRemoteOfferSending = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTransceiver(track, {streams: [stream]});
+
+ const offer = await pc1.createOffer();
+
+ const trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, offer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc2.getTransceivers()[0].receiver.track,
+ streams: [{id: stream.id}]
+ }
+ ]);
+
+
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: null},
+ direction: "recvonly",
+ currentDirection: null,
+ }
+ ]);
+ };
+
+ const checkAddTransceiverWithSetRemoteOfferNoSend = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTransceiver(track);
+ pc1.getTransceivers()[0].direction = "recvonly";
+
+ const offer = await pc1.createOffer();
+ const trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, offer);
+ hasProps(trackEvents, []);
+
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: null},
+ // rtcweb-jsep says this is recvonly, w3c-webrtc does not...
+ direction: "recvonly",
+ currentDirection: null,
+ }
+ ]);
+ };
+
+ const checkAddTransceiverBadKind = async t => {
+ const pc = new RTCPeerConnection();
+ t.add_cleanup(() => pc.close());
+ try {
+ pc.addTransceiver("foo");
+ assert_true(false, 'addTransceiver("foo") throws');
+ }
+ catch (e) {
+ if (e instanceof TypeError) {
+ assert_true(true, 'addTransceiver("foo") throws a TypeError');
+ } else {
+ assert_true(false, 'addTransceiver("foo") throws a TypeError');
+ }
+ }
+
+ hasProps(pc.getTransceivers(), []);
+ };
+
+ const checkNoMidOffer = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTrack(track, stream);
+
+ const offer = await pc1.createOffer();
+ await pc1.setLocalDescription(offer);
+
+ // Remove mid attr
+ offer.sdp = offer.sdp.replace("a=mid:", "a=unknownattr:");
+ offer.sdp = offer.sdp.replace("a=group:", "a=unknownattr:");
+ await pc2.setRemoteDescription(offer);
+
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: null},
+ direction: "recvonly",
+ currentDirection: null,
+ }
+ ]);
+
+ const answer = await pc2.createAnswer();
+ await pc2.setLocalDescription(answer);
+ await pc1.setRemoteDescription(answer);
+ };
+
+ const checkNoMidAnswer = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTrack(track, stream);
+
+ const offer = await pc1.createOffer();
+ await pc1.setLocalDescription(offer);
+ await pc2.setRemoteDescription(offer);
+
+ hasPropsAndUniqueMids(pc1.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: {kind: "audio"}},
+ direction: "sendrecv",
+ currentDirection: null,
+ }
+ ]);
+
+ const lastMid = pc1.getTransceivers()[0].mid;
+
+ let answer = await pc2.createAnswer();
+ // Remove mid attr
+ answer.sdp = answer.sdp.replace("a=mid:", "a=unknownattr:");
+ // Remove group attr also
+ answer.sdp = answer.sdp.replace("a=group:", "a=unknownattr:");
+ await pc1.setRemoteDescription(answer);
+
+ hasProps(pc1.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: {kind: "audio"}},
+ direction: "sendrecv",
+ currentDirection: "sendonly",
+ mid: lastMid
+ }
+ ]);
+
+ const reoffer = await pc1.createOffer();
+ await pc1.setLocalDescription(reoffer);
+ hasProps(pc1.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: {kind: "audio"}},
+ direction: "sendrecv",
+ currentDirection: "sendonly",
+ mid: lastMid
+ }
+ ]);
+ };
+
+ const checkAddTransceiverNoTrackDoesntPair = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ pc1.addTransceiver("audio");
+ pc2.addTransceiver("audio");
+
+ const offer = await pc1.createOffer();
+ const trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, offer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc2.getTransceivers()[1].receiver.track,
+ streams: []
+ }
+ ]);
+
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {mid: null}, // no addTrack magic, doesn't auto-pair
+ {} // Created by SRD
+ ]);
+ };
+
+ const checkAddTransceiverWithTrackDoesntPair = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+ pc1.addTransceiver("audio");
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc2.addTransceiver(track);
+
+ const offer = await pc1.createOffer();
+ const trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, offer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc2.getTransceivers()[1].receiver.track,
+ streams: []
+ }
+ ]);
+
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {mid: null, sender: {track}},
+ {sender: {track: null}} // Created by SRD
+ ]);
+ };
+
+ const checkAddTransceiverThenReplaceTrackDoesntPair = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+ pc1.addTransceiver("audio");
+ pc2.addTransceiver("audio");
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ await pc2.getTransceivers()[0].sender.replaceTrack(track);
+
+ const offer = await pc1.createOffer();
+ const trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, offer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc2.getTransceivers()[1].receiver.track,
+ streams: []
+ }
+ ]);
+
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {mid: null, sender: {track}},
+ {sender: {track: null}} // Created by SRD
+ ]);
+ };
+
+ const checkAddTransceiverThenAddTrackPairs = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+ pc1.addTransceiver("audio");
+ pc2.addTransceiver("audio");
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc2.addTrack(track, stream);
+
+ const offer = await pc1.createOffer();
+ const trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, offer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc2.getTransceivers()[0].receiver.track,
+ streams: []
+ }
+ ]);
+
+ // addTransceiver-transceivers cannot attach to a remote offers, so a second
+ // transceiver is created and associated whilst the first transceiver
+ // remains unassociated.
+ assert_equals(pc2.getTransceivers()[0].mid, null);
+ assert_not_equals(pc2.getTransceivers()[1].mid, null);
+ };
+
+ const checkAddTrackPairs = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+ pc1.addTransceiver("audio");
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc2.addTrack(track, stream);
+
+ const offer = await pc1.createOffer();
+ const trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, offer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc2.getTransceivers()[0].receiver.track,
+ streams: []
+ }
+ ]);
+
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {sender: {track}}
+ ]);
+ };
+
+ const checkReplaceTrackNullDoesntPreventPairing = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+ pc1.addTransceiver("audio");
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc2.addTrack(track, stream);
+ await pc2.getTransceivers()[0].sender.replaceTrack(null);
+
+ const offer = await pc1.createOffer();
+ const trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, offer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc2.getTransceivers()[0].receiver.track,
+ streams: []
+ }
+ ]);
+
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {sender: {track: null}}
+ ]);
+ };
+
+ const checkRemoveAndReadd = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTrack(track, stream);
+
+ await offerAnswer(pc1, pc2);
+
+ pc1.removeTrack(pc1.getSenders()[0]);
+ pc1.addTrack(track, stream);
+
+ hasProps(pc1.getTransceivers(),
+ [
+ {
+ sender: {track: null},
+ direction: "recvonly"
+ },
+ {
+ sender: {track},
+ direction: "sendrecv"
+ }
+ ]);
+
+ // pc1 is offerer
+ await offerAnswer(pc1, pc2);
+
+ hasProps(pc2.getTransceivers(),
+ [
+ {currentDirection: "inactive"},
+ {currentDirection: "recvonly"}
+ ]);
+
+ pc1.removeTrack(pc1.getSenders()[1]);
+ pc1.addTrack(track, stream);
+
+ hasProps(pc1.getTransceivers(),
+ [
+ {
+ sender: {track: null},
+ direction: "recvonly"
+ },
+ {
+ sender: {track: null},
+ direction: "recvonly"
+ },
+ {
+ sender: {track},
+ direction: "sendrecv"
+ }
+ ]);
+
+ // pc1 is answerer. We need to create a new transceiver so pc1 will have
+ // something to attach the re-added track to
+ pc2.addTransceiver("audio");
+
+ await offerAnswer(pc2, pc1);
+
+ hasProps(pc2.getTransceivers(),
+ [
+ {currentDirection: "inactive"},
+ {currentDirection: "inactive"},
+ {currentDirection: "sendrecv"}
+ ]);
+ };
+
+ const checkAddTrackExistingTransceiverThenRemove = async t => {
+ const pc = new RTCPeerConnection();
+ t.add_cleanup(() => pc.close());
+ pc.addTransceiver("audio");
+ const stream = await getNoiseStream({audio: true});
+ const audio = stream.getAudioTracks()[0];
+ let sender = pc.addTrack(audio, stream);
+ pc.removeTrack(sender);
+
+ // Cause transceiver to be associated
+ await pc.setLocalDescription(await pc.createOffer());
+
+ // Make sure add/remove works still
+ sender = pc.addTrack(audio, stream);
+ pc.removeTrack(sender);
+
+ stopTracks(stream);
+ };
+
+ const checkRemoveTrackNegotiation = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+ const stream = await getNoiseStream({audio: true, video: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const audio = stream.getAudioTracks()[0];
+ pc1.addTrack(audio, stream);
+ const video = stream.getVideoTracks()[0];
+ pc1.addTrack(video, stream);
+ // We want both a sendrecv and sendonly transceiver to test that the
+ // appropriate direction changes happen.
+ pc1.getTransceivers()[1].direction = "sendonly";
+
+ let offer = await pc1.createOffer();
+
+ // Get a reference to the stream
+ let trackEventCollector = collectTrackEvents(pc2);
+ await pc2.setRemoteDescription(offer);
+ let pc2TrackEvents = trackEventCollector.finish();
+ hasProps(pc2TrackEvents,
+ [
+ {streams: [{id: stream.id}]},
+ {streams: [{id: stream.id}]}
+ ]);
+ const receiveStream = pc2TrackEvents[0].streams[0];
+
+ // Verify that rollback causes onremovetrack to fire for the added tracks
+ let removetrackEventCollector = collectRemoveTrackEvents(receiveStream);
+ await pc2.setRemoteDescription({type: "rollback"});
+ let removedtracks = removetrackEventCollector.finish().map(e => e.track);
+ assert_equals(removedtracks.length, 2,
+ "Rollback should have removed two tracks");
+ assert_true(removedtracks.includes(pc2TrackEvents[0].track),
+ "First track should be removed");
+ assert_true(removedtracks.includes(pc2TrackEvents[1].track),
+ "Second track should be removed");
+
+ offer = await pc1.createOffer();
+
+ let addtrackEventCollector = collectAddTrackEvents(receiveStream);
+ trackEventCollector = collectTrackEvents(pc2);
+ await pc2.setRemoteDescription(offer);
+ pc2TrackEvents = trackEventCollector.finish();
+ let addedtracks = addtrackEventCollector.finish().map(e => e.track);
+ assert_equals(addedtracks.length, 2,
+ "pc2.setRemoteDescription(offer) should've added 2 tracks to receive stream");
+ assert_true(addedtracks.includes(pc2TrackEvents[0].track),
+ "First track should be added");
+ assert_true(addedtracks.includes(pc2TrackEvents[1].track),
+ "Second track should be added");
+
+ await pc1.setLocalDescription(offer);
+ let answer = await pc2.createAnswer();
+ await pc1.setRemoteDescription(answer);
+ await pc2.setLocalDescription(answer);
+ pc1.removeTrack(pc1.getSenders()[0]);
+
+ hasProps(pc1.getSenders(),
+ [
+ {track: null},
+ {track: video}
+ ]);
+
+ hasProps(pc1.getTransceivers(),
+ [
+ {
+ sender: {track: null},
+ direction: "recvonly"
+ },
+ {
+ sender: {track: video},
+ direction: "sendonly"
+ }
+ ]);
+
+ await negotiationNeeded(pc1);
+
+ pc1.removeTrack(pc1.getSenders()[1]);
+
+ hasProps(pc1.getSenders(),
+ [
+ {track: null},
+ {track: null}
+ ]);
+
+ hasProps(pc1.getTransceivers(),
+ [
+ {
+ sender: {track: null},
+ direction: "recvonly"
+ },
+ {
+ sender: {track: null},
+ direction: "inactive"
+ }
+ ]);
+
+ // pc1 as offerer
+ offer = await pc1.createOffer();
+
+ removetrackEventCollector = collectRemoveTrackEvents(receiveStream);
+ await pc2.setRemoteDescription(offer);
+ removedtracks = removetrackEventCollector.finish().map(e => e.track);
+ assert_equals(removedtracks.length, 2, "Should have two removed tracks");
+ assert_true(removedtracks.includes(pc2TrackEvents[0].track),
+ "First track should be removed");
+ assert_true(removedtracks.includes(pc2TrackEvents[1].track),
+ "Second track should be removed");
+
+ addtrackEventCollector = collectAddTrackEvents(receiveStream);
+ await pc2.setRemoteDescription({type: "rollback"});
+ addedtracks = addtrackEventCollector.finish().map(e => e.track);
+ assert_equals(addedtracks.length, 2, "Rollback should have added two tracks");
+
+ // pc2 as offerer
+ offer = await pc2.createOffer();
+ await pc2.setLocalDescription(offer);
+ await pc1.setRemoteDescription(offer);
+ answer = await pc1.createAnswer();
+ await pc1.setLocalDescription(answer);
+
+ removetrackEventCollector = collectRemoveTrackEvents(receiveStream);
+ await pc2.setRemoteDescription(answer);
+ removedtracks = removetrackEventCollector.finish().map(e => e.track);
+ assert_equals(removedtracks.length, 2, "Should have two removed tracks");
+
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ currentDirection: "inactive"
+ },
+ {
+ currentDirection: "inactive"
+ }
+ ]);
+ };
+
+ const checkSetDirection = async t => {
+ const pc = new RTCPeerConnection();
+ t.add_cleanup(() => pc.close());
+ pc.addTransceiver("audio");
+
+ pc.getTransceivers()[0].direction = "sendonly";
+ hasProps(pc.getTransceivers(),[{direction: "sendonly"}]);
+ pc.getTransceivers()[0].direction = "recvonly";
+ hasProps(pc.getTransceivers(),[{direction: "recvonly"}]);
+ pc.getTransceivers()[0].direction = "inactive";
+ hasProps(pc.getTransceivers(),[{direction: "inactive"}]);
+ pc.getTransceivers()[0].direction = "sendrecv";
+ hasProps(pc.getTransceivers(),[{direction: "sendrecv"}]);
+ };
+
+ const checkCurrentDirection = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTrack(track, stream);
+ pc2.addTrack(track, stream);
+ hasProps(pc1.getTransceivers(), [{currentDirection: null}]);
+
+ let offer = await pc1.createOffer();
+ hasProps(pc1.getTransceivers(), [{currentDirection: null}]);
+
+ await pc1.setLocalDescription(offer);
+ hasProps(pc1.getTransceivers(), [{currentDirection: null}]);
+
+ let trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, offer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc2.getTransceivers()[0].receiver.track,
+ streams: [{id: stream.id}]
+ }
+ ]);
+
+ hasProps(pc2.getTransceivers(), [{currentDirection: null}]);
+
+ let answer = await pc2.createAnswer();
+ hasProps(pc2.getTransceivers(), [{currentDirection: null}]);
+
+ await pc2.setLocalDescription(answer);
+ hasProps(pc2.getTransceivers(), [{currentDirection: "sendrecv"}]);
+
+ trackEvents = await setRemoteDescriptionReturnTrackEvents(pc1, answer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc1.getTransceivers()[0].receiver.track,
+ streams: [{id: stream.id}]
+ }
+ ]);
+
+ hasProps(pc1.getTransceivers(), [{currentDirection: "sendrecv"}]);
+
+ pc2.getTransceivers()[0].direction = "sendonly";
+
+ offer = await pc2.createOffer();
+ hasProps(pc2.getTransceivers(), [{currentDirection: "sendrecv"}]);
+
+ await pc2.setLocalDescription(offer);
+ hasProps(pc2.getTransceivers(), [{currentDirection: "sendrecv"}]);
+
+ trackEvents = await setRemoteDescriptionReturnTrackEvents(pc1, offer);
+ hasProps(trackEvents, []);
+
+ hasProps(pc1.getTransceivers(), [{currentDirection: "sendrecv"}]);
+
+ answer = await pc1.createAnswer();
+ hasProps(pc1.getTransceivers(), [{currentDirection: "sendrecv"}]);
+
+ await pc1.setLocalDescription(answer);
+ hasProps(pc1.getTransceivers(), [{currentDirection: "recvonly"}]);
+
+ trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, answer);
+ hasProps(trackEvents, []);
+
+ hasProps(pc2.getTransceivers(), [{currentDirection: "sendonly"}]);
+
+ pc2.getTransceivers()[0].direction = "sendrecv";
+
+ offer = await pc2.createOffer();
+ hasProps(pc2.getTransceivers(), [{currentDirection: "sendonly"}]);
+
+ await pc2.setLocalDescription(offer);
+ hasProps(pc2.getTransceivers(), [{currentDirection: "sendonly"}]);
+
+ trackEvents = await setRemoteDescriptionReturnTrackEvents(pc1, offer);
+ hasProps(trackEvents, []);
+
+ hasProps(pc1.getTransceivers(), [{currentDirection: "recvonly"}]);
+
+ answer = await pc1.createAnswer();
+ hasProps(pc1.getTransceivers(), [{currentDirection: "recvonly"}]);
+
+ await pc1.setLocalDescription(answer);
+ hasProps(pc1.getTransceivers(), [{currentDirection: "sendrecv"}]);
+
+ trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, answer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc2.getTransceivers()[0].receiver.track,
+ streams: [{id: stream.id}]
+ }
+ ]);
+
+ hasProps(pc2.getTransceivers(), [{currentDirection: "sendrecv"}]);
+
+ pc2.close();
+ hasProps(pc2.getTransceivers(), [{currentDirection: "stopped"}]);
+ };
+
+ const checkSendrecvWithNoSendTrack = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTransceiver("audio");
+ pc1.getTransceivers()[0].direction = "sendrecv";
+ pc2.addTrack(track, stream);
+
+ const offer = await pc1.createOffer();
+
+ let trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, offer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc2.getTransceivers()[0].receiver.track,
+ streams: []
+ }
+ ]);
+
+ trickle(t, pc1, pc2);
+ await pc1.setLocalDescription(offer);
+
+ const answer = await pc2.createAnswer();
+ trackEvents = await setRemoteDescriptionReturnTrackEvents(pc1, answer);
+ // Spec language doesn't say anything about checking whether the transceiver
+ // is stopped here.
+ hasProps(trackEvents,
+ [
+ {
+ track: pc1.getTransceivers()[0].receiver.track,
+ streams: [{id: stream.id}]
+ }
+ ]);
+
+ trickle(t, pc2, pc1);
+ await pc2.setLocalDescription(answer);
+
+ await iceConnected(pc1);
+ await iceConnected(pc2);
+ };
+
+ const checkSendrecvWithTracklessStream = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ const stream = new MediaStream();
+ pc1.addTransceiver("audio", {streams: [stream]});
+
+ const offer = await pc1.createOffer();
+
+ const trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, offer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc2.getTransceivers()[0].receiver.track,
+ streams: [{id: stream.id}]
+ }
+ ]);
+ };
+
+ const checkMute = async t => {
+ const pc1 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ const stream1 = await getNoiseStream({audio: true, video: true});
+ t.add_cleanup(() => stopTracks(stream1));
+ const audio1 = stream1.getAudioTracks()[0];
+ pc1.addTrack(audio1, stream1);
+ const countMuteAudio1 = countEvents(pc1.getTransceivers()[0].receiver.track, "mute");
+ const countUnmuteAudio1 = countEvents(pc1.getTransceivers()[0].receiver.track, "unmute");
+
+ const video1 = stream1.getVideoTracks()[0];
+ pc1.addTrack(video1, stream1);
+ const countMuteVideo1 = countEvents(pc1.getTransceivers()[1].receiver.track, "mute");
+ const countUnmuteVideo1 = countEvents(pc1.getTransceivers()[1].receiver.track, "unmute");
+
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc2.close());
+ const stream2 = await getNoiseStream({audio: true, video: true});
+ t.add_cleanup(() => stopTracks(stream2));
+ const audio2 = stream2.getAudioTracks()[0];
+ pc2.addTrack(audio2, stream2);
+ const countMuteAudio2 = countEvents(pc2.getTransceivers()[0].receiver.track, "mute");
+ const countUnmuteAudio2 = countEvents(pc2.getTransceivers()[0].receiver.track, "unmute");
+
+ const video2 = stream2.getVideoTracks()[0];
+ pc2.addTrack(video2, stream2);
+ const countMuteVideo2 = countEvents(pc2.getTransceivers()[1].receiver.track, "mute");
+ const countUnmuteVideo2 = countEvents(pc2.getTransceivers()[1].receiver.track, "unmute");
+
+
+ // Check that receive tracks start muted
+ hasProps(pc1.getTransceivers(),
+ [
+ {receiver: {track: {kind: "audio", muted: true}}},
+ {receiver: {track: {kind: "video", muted: true}}}
+ ]);
+
+ hasProps(pc1.getTransceivers(),
+ [
+ {receiver: {track: {kind: "audio", muted: true}}},
+ {receiver: {track: {kind: "video", muted: true}}}
+ ]);
+
+ let offer = await pc1.createOffer();
+ await pc2.setRemoteDescription(offer);
+ trickle(t, pc1, pc2);
+ await pc1.setLocalDescription(offer);
+ let answer = await pc2.createAnswer();
+ await pc1.setRemoteDescription(answer);
+ trickle(t, pc2, pc1);
+ await pc2.setLocalDescription(answer);
+
+ let gotUnmuteAudio1 = gotUnmuteEvent(pc1.getTransceivers()[0].receiver.track);
+ let gotUnmuteVideo1 = gotUnmuteEvent(pc1.getTransceivers()[1].receiver.track);
+
+ let gotUnmuteAudio2 = gotUnmuteEvent(pc2.getTransceivers()[0].receiver.track);
+ let gotUnmuteVideo2 = gotUnmuteEvent(pc2.getTransceivers()[1].receiver.track);
+ // Jump out before waiting if a track is unmuted before RTP starts flowing.
+ assert_true(pc1.getTransceivers()[0].receiver.track.muted);
+ assert_true(pc1.getTransceivers()[1].receiver.track.muted);
+ assert_true(pc2.getTransceivers()[0].receiver.track.muted);
+ assert_true(pc2.getTransceivers()[1].receiver.track.muted);
+
+ await iceConnected(pc1);
+ await iceConnected(pc2);
+
+
+ // Check that receive tracks are unmuted when RTP starts flowing
+ await gotUnmuteAudio1;
+ await gotUnmuteVideo1;
+ await gotUnmuteAudio2;
+ await gotUnmuteVideo2;
+
+ // Check whether disabling recv locally causes onmute
+ pc1.getTransceivers()[0].direction = "sendonly";
+ pc1.getTransceivers()[1].direction = "sendonly";
+ offer = await pc1.createOffer();
+ await pc2.setRemoteDescription(offer);
+ await pc1.setLocalDescription(offer);
+ answer = await pc2.createAnswer();
+ const gotMuteAudio1 = gotMuteEvent(pc1.getTransceivers()[0].receiver.track);
+ const gotMuteVideo1 = gotMuteEvent(pc1.getTransceivers()[1].receiver.track);
+ await pc1.setRemoteDescription(answer);
+ await pc2.setLocalDescription(answer);
+ await gotMuteAudio1;
+ await gotMuteVideo1;
+
+ // Check whether disabling on remote causes onmute
+ pc1.getTransceivers()[0].direction = "inactive";
+ pc1.getTransceivers()[1].direction = "inactive";
+ offer = await pc1.createOffer();
+ const gotMuteAudio2 = gotMuteEvent(pc2.getTransceivers()[0].receiver.track);
+ const gotMuteVideo2 = gotMuteEvent(pc2.getTransceivers()[1].receiver.track);
+ await pc2.setRemoteDescription(offer);
+ await gotMuteAudio2;
+ await gotMuteVideo2;
+ await pc1.setLocalDescription(offer);
+ answer = await pc2.createAnswer();
+ await pc1.setRemoteDescription(answer);
+ await pc2.setLocalDescription(answer);
+
+ // Check whether onunmute fires when we turn everything on again
+ pc1.getTransceivers()[0].direction = "sendrecv";
+ pc1.getTransceivers()[1].direction = "sendrecv";
+ offer = await pc1.createOffer();
+ await pc2.setRemoteDescription(offer);
+ // Set these up before sLD, since that sets [[Receptive]] to true, which
+ // could allow an unmute to occur from a packet that was sent before we
+ // negotiated inactive!
+ gotUnmuteAudio1 = gotUnmuteEvent(pc1.getTransceivers()[0].receiver.track);
+ gotUnmuteVideo1 = gotUnmuteEvent(pc1.getTransceivers()[1].receiver.track);
+ await pc1.setLocalDescription(offer);
+ answer = await pc2.createAnswer();
+ gotUnmuteAudio2 = gotUnmuteEvent(pc2.getTransceivers()[0].receiver.track);
+ gotUnmuteVideo2 = gotUnmuteEvent(pc2.getTransceivers()[1].receiver.track);
+ await pc1.setRemoteDescription(answer);
+ await pc2.setLocalDescription(answer);
+ await gotUnmuteAudio1;
+ await gotUnmuteVideo1;
+ await gotUnmuteAudio2;
+ await gotUnmuteVideo2;
+
+ // Wait a little, just in case some stray events fire
+ await new Promise(r => t.step_timeout(r, 100));
+
+ assert_equals(1, countMuteAudio1.count, "Got 1 mute event for pc1's audio track");
+ assert_equals(1, countMuteVideo1.count, "Got 1 mute event for pc1's video track");
+ assert_equals(1, countMuteAudio2.count, "Got 1 mute event for pc2's audio track");
+ assert_equals(1, countMuteVideo2.count, "Got 1 mute event for pc2's video track");
+ assert_equals(2, countUnmuteAudio1.count, "Got 2 unmute events for pc1's audio track");
+ assert_equals(2, countUnmuteVideo1.count, "Got 2 unmute events for pc1's video track");
+ assert_equals(2, countUnmuteAudio2.count, "Got 2 unmute events for pc2's audio track");
+ assert_equals(2, countUnmuteVideo2.count, "Got 2 unmute events for pc2's video track");
+ };
+
+ const checkStop = async t => {
+ const pc1 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTrack(track, stream);
+
+ let offer = await pc1.createOffer();
+ await pc1.setLocalDescription(offer);
+
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc2.close());
+ await pc2.setRemoteDescription(offer);
+
+ pc2.addTrack(track, stream);
+
+ const answer = await pc2.createAnswer();
+ await pc2.setLocalDescription(answer);
+ await pc1.setRemoteDescription(answer);
+
+ let stoppedTransceiver = pc1.getTransceivers()[0];
+ let onended = new Promise(resolve => {
+ stoppedTransceiver.receiver.track.onended = resolve;
+ });
+ stoppedTransceiver.stop();
+ assert_equals(pc1.getReceivers().length, 1, 'getReceivers exposes a receiver of a stopped transceiver before negotiation');
+ assert_equals(pc1.getSenders().length, 1, 'getSenders exposes a sender of a stopped transceiver before negotiation');
+ await onended;
+ // The transceiver has [[stopping]] = true, [[stopped]] = false
+ hasPropsAndUniqueMids(pc1.getTransceivers(),
+ [
+ {
+ sender: {track: {kind: "audio"}},
+ receiver: {track: {kind: "audio", readyState: "ended"}},
+ currentDirection: "sendrecv",
+ direction: "stopped"
+ }
+ ]);
+
+ const transceiver = pc1.getTransceivers()[0];
+
+ checkThrows(() => transceiver.sender.setParameters(
+ transceiver.sender.getParameters()),
+ "InvalidStateError", "setParameters on stopped transceiver");
+
+ const stream2 = await getNoiseStream({audio: true});
+ const track2 = stream.getAudioTracks()[0];
+ checkThrows(() => transceiver.sender.replaceTrack(track2),
+ "InvalidStateError", "replaceTrack on stopped transceiver");
+
+ checkThrows(() => transceiver.direction = "sendrecv",
+ "InvalidStateError", "set direction on stopped transceiver");
+
+ checkThrows(() => transceiver.sender.dtmf.insertDTMF("111"),
+ "InvalidStateError", "insertDTMF on stopped transceiver");
+
+ // Shouldn't throw
+ stoppedTransceiver.stop();
+
+ offer = await pc1.createOffer();
+ await pc1.setLocalDescription(offer);
+
+ const stoppedCalleeTransceiver = pc2.getTransceivers()[0];
+ onended = new Promise(resolve => {
+ stoppedCalleeTransceiver.receiver.track.onended = resolve;
+ });
+
+ await pc2.setRemoteDescription(offer);
+
+ await onended;
+ // pc2's transceiver was stopped remotely.
+ // The track ends when setRemeoteDescription(offer) is set.
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ sender: {track: {kind: "audio"}},
+ receiver: {track: {kind: "audio", readyState: "ended"}},
+ currentDirection: "stopped",
+ direction: "stopped"
+ }
+ ]);
+ // After setLocalDescription(answer), the transceiver has
+ // [[stopping]] = true, [[stopped]] = true, and is removed from pc2.
+ const stoppingAnswer = await pc2.createAnswer();
+ await pc2.setLocalDescription(stoppingAnswer);
+ assert_equals(pc2.getTransceivers().length, 0);
+ assert_equals(pc2.getReceivers().length, 0, 'getReceivers does not expose a receiver of a stopped transceiver after negotiation');
+ assert_equals(pc2.getSenders().length, 0, 'getSenders does not expose a sender of a stopped transceiver after negotiation');
+
+ // Shouldn't throw either
+ stoppedTransceiver.stop();
+ await pc1.setRemoteDescription(stoppingAnswer);
+ assert_equals(pc1.getReceivers().length, 0, 'getReceivers does not expose a receiver of a stopped transceiver after negotiation');
+ assert_equals(pc1.getSenders().length, 0, 'getSenders does not expose a sender of a stopped transceiver after negotiation');
+
+ pc1.close();
+ pc2.close();
+
+ // Spec says the closed check comes before the stopped check, so this
+ // should throw now.
+ checkThrows(() => stoppedTransceiver.stop(),
+ "InvalidStateError", "RTCRtpTransceiver.stop() with closed PC");
+ };
+
+ const checkStopAfterCreateOffer = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTrack(track, stream);
+ pc2.addTrack(track, stream);
+
+ let offer = await pc1.createOffer();
+
+ const transceiverThatWasStopped = pc1.getTransceivers()[0];
+ transceiverThatWasStopped.stop();
+ await pc2.setRemoteDescription(offer)
+ trickle(t, pc1, pc2);
+ await pc1.setLocalDescription(offer);
+
+ let answer = await pc2.createAnswer();
+ const negotiationNeededAwaiter = negotiationNeeded(pc1);
+ const trackEvents = await setRemoteDescriptionReturnTrackEvents(pc1, answer);
+ // Spec language doesn't say anything about checking whether the transceiver
+ // is stopped here.
+ hasProps(trackEvents,
+ [
+ {
+ track: pc1.getTransceivers()[0].receiver.track,
+ streams: [{id: stream.id}]
+ }
+ ]);
+
+ assert_equals(transceiverThatWasStopped, pc1.getTransceivers()[0]);
+ // The transceiver should still be [[stopping]]=true, [[stopped]]=false.
+ hasPropsAndUniqueMids(pc1.getTransceivers(),
+ [
+ {
+ currentDirection: "sendrecv",
+ direction: "stopped"
+ }
+ ]);
+
+ await negotiationNeededAwaiter;
+
+ trickle(t, pc2, pc1);
+
+ await pc2.setLocalDescription(answer);
+
+ await iceConnected(pc1);
+ await iceConnected(pc2);
+
+ offer = await pc1.createOffer();
+ await pc1.setLocalDescription(offer);
+ await pc2.setRemoteDescription(offer);
+ answer = await pc2.createAnswer();
+ await pc2.setLocalDescription(answer);
+ await pc1.setRemoteDescription(answer);
+ assert_equals(pc1.getTransceivers().length, 0);
+ assert_equals(pc2.getTransceivers().length, 0);
+ };
+
+ const checkStopAfterSetLocalOffer = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTrack(track, stream);
+ pc2.addTrack(track, stream);
+
+ let offer = await pc1.createOffer();
+
+ await pc2.setRemoteDescription(offer)
+ trickle(t, pc1, pc2);
+ await pc1.setLocalDescription(offer);
+
+ pc1.getTransceivers()[0].stop();
+
+ let answer = await pc2.createAnswer();
+ const negotiationNeededAwaiter = negotiationNeeded(pc1);
+ const trackEvents = await setRemoteDescriptionReturnTrackEvents(pc1, answer);
+ // Spec language doesn't say anything about checking whether the transceiver
+ // is stopped here.
+ hasProps(trackEvents,
+ [
+ {
+ track: pc1.getTransceivers()[0].receiver.track,
+ streams: [{id: stream.id}]
+ }
+ ]);
+
+ hasPropsAndUniqueMids(pc1.getTransceivers(),
+ [
+ {
+ direction: "stopped",
+ currentDirection: "sendrecv"
+ }
+ ]);
+ await negotiationNeededAwaiter;
+
+ trickle(t, pc2, pc1);
+ await pc2.setLocalDescription(answer);
+
+ await iceConnected(pc1);
+ await iceConnected(pc2);
+
+ offer = await pc1.createOffer();
+ await pc1.setLocalDescription(offer);
+ await pc2.setRemoteDescription(offer);
+ answer = await pc2.createAnswer();
+ await pc2.setLocalDescription(answer);
+ await pc1.setRemoteDescription(answer);
+
+ assert_equals(pc1.getTransceivers().length, 0);
+ assert_equals(pc2.getTransceivers().length, 0);
+ };
+
+ const checkStopAfterSetRemoteOffer = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTrack(track, stream);
+ pc2.addTrack(track, stream);
+
+ const offer = await pc1.createOffer();
+
+ await pc2.setRemoteDescription(offer)
+ await pc1.setLocalDescription(offer);
+
+ // Stop on _answerer_ side now. Should not stop transceiver in answer,
+ // but cause firing of negotiationNeeded at pc2, and disabling
+ // of the transceiver with direction = inactive in answer.
+ pc2.getTransceivers()[0].stop();
+ assert_equals(pc2.getTransceivers()[0].direction, 'stopped');
+
+ const answer = await pc2.createAnswer();
+ const trackEvents = await setRemoteDescriptionReturnTrackEvents(pc1, answer);
+ hasProps(trackEvents, []);
+
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ direction: "stopped",
+ currentDirection: null,
+ }
+ ]);
+
+ const negotiationNeededAwaiter = negotiationNeeded(pc2);
+ await pc2.setLocalDescription(answer);
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ direction: "stopped",
+ currentDirection: "inactive",
+ }
+ ]);
+
+ await negotiationNeededAwaiter;
+ };
+
+ const checkStopAfterCreateAnswer = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTrack(track, stream);
+ pc2.addTrack(track, stream);
+
+ let offer = await pc1.createOffer();
+
+ await pc2.setRemoteDescription(offer)
+ trickle(t, pc1, pc2);
+ await pc1.setLocalDescription(offer);
+
+ let answer = await pc2.createAnswer();
+
+ // Too late for this to go in the answer. ICE should succeed.
+ pc2.getTransceivers()[0].stop();
+
+ const trackEvents = await setRemoteDescriptionReturnTrackEvents(pc1, answer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc1.getTransceivers()[0].receiver.track,
+ streams: [{id: stream.id}]
+ }
+ ]);
+
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {
+ direction: "stopped",
+ currentDirection: null,
+ }
+ ]);
+
+ trickle(t, pc2, pc1);
+ // The negotiationneeded event is fired during processing of
+ // setLocalDescription()
+ const negotiationNeededAwaiter = negotiationNeeded(pc2);
+ await pc2.setLocalDescription(answer);
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {
+ direction: "stopped",
+ currentDirection: "sendrecv",
+ }
+ ]);
+
+ await negotiationNeededAwaiter;
+ await iceConnected(pc1);
+ await iceConnected(pc2);
+
+ offer = await pc1.createOffer();
+ await pc1.setLocalDescription(offer);
+ await pc2.setRemoteDescription(offer);
+ answer = await pc2.createAnswer();
+ await pc2.setLocalDescription(answer);
+ await pc1.setRemoteDescription(answer);
+
+ // Since this offer/answer exchange was initiated from pc1,
+ // pc2 still doesn't get to say that it has a stopped transceiver,
+ // but does get to set it to inactive.
+ hasProps(pc1.getTransceivers(),
+ [
+ {
+ direction: "sendrecv",
+ currentDirection: "inactive",
+ }
+ ]);
+
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ direction: "stopped",
+ currentDirection: "inactive",
+ }
+ ]);
+ };
+
+ const checkStopAfterSetLocalAnswer = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTrack(track, stream);
+ pc2.addTrack(track, stream);
+
+ let offer = await pc1.createOffer();
+
+ await pc2.setRemoteDescription(offer)
+ trickle(t, pc1, pc2);
+ await pc1.setLocalDescription(offer);
+
+ let answer = await pc2.createAnswer();
+
+ const trackEvents = await setRemoteDescriptionReturnTrackEvents(pc1, answer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc1.getTransceivers()[0].receiver.track,
+ streams: [{id: stream.id}]
+ }
+ ]);
+
+ trickle(t, pc2, pc1);
+ await pc2.setLocalDescription(answer);
+
+ // ICE should succeed.
+ pc2.getTransceivers()[0].stop();
+
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {
+ direction: "stopped",
+ currentDirection: "sendrecv",
+ }
+ ]);
+
+ await negotiationNeeded(pc2);
+ await iceConnected(pc1);
+ await iceConnected(pc2);
+
+ // Initiate an offer/answer exchange from pc2 in order
+ // to negotiate the stopped transceiver.
+ offer = await pc2.createOffer();
+ await pc2.setLocalDescription(offer);
+ await pc1.setRemoteDescription(offer);
+ answer = await pc1.createAnswer();
+ await pc1.setLocalDescription(answer);
+ await pc2.setRemoteDescription(answer);
+
+ assert_equals(pc1.getTransceivers().length, 0);
+ assert_equals(pc2.getTransceivers().length, 0);
+ };
+
+ const checkStopAfterClose = async t => {
+ const pc1 = new RTCPeerConnection();
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTrack(track, stream);
+ pc2.addTrack(track, stream);
+
+ const offer = await pc1.createOffer();
+ await pc2.setRemoteDescription(offer)
+ await pc1.setLocalDescription(offer);
+ const answer = await pc2.createAnswer();
+ await pc2.setLocalDescription(answer);
+ await pc1.setRemoteDescription(answer);
+
+ pc1.close();
+ await checkThrows(() => pc1.getTransceivers()[0].stop(),
+ "InvalidStateError",
+ "Stopping a transceiver on a closed PC should throw.");
+ };
+
+ const checkLocalRollback = async t => {
+ const pc = new RTCPeerConnection();
+ t.add_cleanup(() => pc.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc.addTrack(track, stream);
+
+ let offer = await pc.createOffer();
+ await pc.setLocalDescription(offer);
+
+ hasPropsAndUniqueMids(pc.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track},
+ direction: "sendrecv",
+ currentDirection: null,
+ }
+ ]);
+
+ // Verify that rollback doesn't stomp things it should not
+ pc.getTransceivers()[0].direction = "sendonly";
+ const stream2 = await getNoiseStream({audio: true});
+ const track2 = stream2.getAudioTracks()[0];
+ await pc.getTransceivers()[0].sender.replaceTrack(track2);
+
+ await pc.setLocalDescription({type: "rollback"});
+
+ hasProps(pc.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: track2},
+ direction: "sendonly",
+ mid: null,
+ currentDirection: null,
+ }
+ ]);
+
+ // Make sure stop() isn't rolled back either.
+ offer = await pc.createOffer();
+ await pc.setLocalDescription(offer);
+ pc.getTransceivers()[0].stop();
+ await pc.setLocalDescription({type: "rollback"});
+
+ hasProps(pc.getTransceivers(), [
+ {
+ direction: "stopped",
+ }
+ ]);
+ };
+
+ const checkRollbackAndSetRemoteOfferWithDifferentType = async t => {
+ const pc1 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+
+ const audioStream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(audioStream));
+ const audioTrack = audioStream.getAudioTracks()[0];
+ pc1.addTrack(audioTrack, audioStream);
+
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc2.close());
+
+ const videoStream = await getNoiseStream({video: true});
+ t.add_cleanup(() => stopTracks(videoStream));
+ const videoTrack = videoStream.getVideoTracks()[0];
+ pc2.addTrack(videoTrack, videoStream);
+
+ await pc1.setLocalDescription(await pc1.createOffer());
+ await pc1.setLocalDescription({type: "rollback"});
+
+ hasProps(pc1.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: audioTrack},
+ direction: "sendrecv",
+ mid: null,
+ currentDirection: null,
+ }
+ ]);
+
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "video"}},
+ sender: {track: videoTrack},
+ direction: "sendrecv",
+ mid: null,
+ currentDirection: null,
+ }
+ ]);
+
+ await offerAnswer(pc2, pc1);
+
+ hasPropsAndUniqueMids(pc1.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: audioTrack},
+ direction: "sendrecv",
+ mid: null,
+ currentDirection: null,
+ },
+ {
+ receiver: {track: {kind: "video"}},
+ sender: {track: null},
+ direction: "recvonly",
+ currentDirection: "recvonly",
+ }
+ ]);
+
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "video"}},
+ sender: {track: videoTrack},
+ direction: "sendrecv",
+ currentDirection: "sendonly",
+ }
+ ]);
+
+ await offerAnswer(pc1, pc2);
+ };
+
+ const checkRemoteRollback = async t => {
+ const pc1 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTrack(track, stream);
+
+ let offer = await pc1.createOffer();
+
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc2.close());
+ await pc2.setRemoteDescription(offer);
+
+ const removedTransceiver = pc2.getTransceivers()[0];
+
+ const onended = new Promise(resolve => {
+ removedTransceiver.receiver.track.onended = resolve;
+ });
+
+ await pc2.setRemoteDescription({type: "rollback"});
+
+ // Transceiver should be _gone_
+ hasProps(pc2.getTransceivers(), []);
+
+ hasProps(removedTransceiver,
+ {
+ mid: null,
+ currentDirection: "stopped"
+ }
+ );
+
+ await onended;
+
+ hasProps(removedTransceiver,
+ {
+ receiver: {track: {readyState: "ended"}},
+ mid: null,
+ currentDirection: "stopped"
+ }
+ );
+
+ // Setting the same offer again should do the same thing as before
+ await pc2.setRemoteDescription(offer);
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: null},
+ direction: "recvonly",
+ currentDirection: null,
+ }
+ ]);
+
+ const mid0 = pc2.getTransceivers()[0].mid;
+
+ // Give pc2 a track with replaceTrack
+ const stream2 = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream2));
+ const track2 = stream2.getAudioTracks()[0];
+ await pc2.getTransceivers()[0].sender.replaceTrack(track2);
+ pc2.getTransceivers()[0].direction = "sendrecv";
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: track2},
+ direction: "sendrecv",
+ mid: mid0,
+ currentDirection: null,
+ }
+ ]);
+
+ await pc2.setRemoteDescription({type: "rollback"});
+
+ // Transceiver should be _gone_, again. replaceTrack doesn't prevent this,
+ // nor does setting direction.
+ hasProps(pc2.getTransceivers(), []);
+
+ // Setting the same offer for a _third_ time should do the same thing
+ await pc2.setRemoteDescription(offer);
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: null},
+ direction: "recvonly",
+ mid: mid0,
+ currentDirection: null,
+ }
+ ]);
+
+ // We should be able to add the same track again
+ pc2.addTrack(track2, stream2);
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: track2},
+ direction: "sendrecv",
+ mid: mid0,
+ currentDirection: null,
+ }
+ ]);
+
+ await pc2.setRemoteDescription({type: "rollback"});
+ // Transceiver should _not_ be gone this time, because addTrack touched it.
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: track2},
+ direction: "sendrecv",
+ mid: null,
+ currentDirection: null,
+ }
+ ]);
+
+ // Complete negotiation so we can test interactions with transceiver.stop()
+ await pc1.setLocalDescription(offer);
+
+ // After all this SRD/rollback, we should still get the track event
+ let trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, offer);
+
+ assert_equals(trackEvents.length, 1);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc2.getTransceivers()[0].receiver.track,
+ streams: [{id: stream.id}]
+ }
+ ]);
+
+ const answer = await pc2.createAnswer();
+ await pc2.setLocalDescription(answer);
+
+ // Make sure all this rollback hasn't messed up the signaling
+ trackEvents = await setRemoteDescriptionReturnTrackEvents(pc1, answer);
+ assert_equals(trackEvents.length, 1);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc1.getTransceivers()[0].receiver.track,
+ streams: [{id: stream2.id}]
+ }
+ ]);
+ hasProps(pc1.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track},
+ direction: "sendrecv",
+ mid: mid0,
+ currentDirection: "sendrecv",
+ }
+ ]);
+
+ // Don't bother waiting for ICE and such
+
+ // Check to see whether rolling back a remote track removal works
+ pc1.getTransceivers()[0].direction = "recvonly";
+ offer = await pc1.createOffer();
+
+ trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, offer);
+ hasProps(trackEvents, []);
+
+ trackEvents =
+ await setRemoteDescriptionReturnTrackEvents(pc2, {type: "rollback"});
+
+ assert_equals(trackEvents.length, 1, 'track event from remote rollback');
+ hasProps(trackEvents,
+ [
+ {
+ track: pc2.getTransceivers()[0].receiver.track,
+ streams: [{id: stream.id}]
+ }
+ ]);
+
+ // Check to see that stop() cannot be rolled back
+ pc1.getTransceivers()[0].stop();
+ offer = await pc1.createOffer();
+
+ await pc2.setRemoteDescription(offer);
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: track2},
+ direction: "stopped",
+ mid: mid0,
+ currentDirection: "stopped",
+ }
+ ]);
+
+ // stop() cannot be rolled back!
+ // Transceiver should have [[stopping]]=true, [[stopped]]=false.
+ await pc2.setRemoteDescription({type: "rollback"});
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ receiver: {track: {kind: "audio"}},
+ sender: {track: {kind: "audio"}},
+ direction: "stopped",
+ mid: mid0,
+ currentDirection: "stopped",
+ }
+ ]);
+ };
+
+ const checkBundleTagRejected = async t => {
+ const pc1 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc2.close());
+
+ const stream1 = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream1));
+ const track1 = stream1.getAudioTracks()[0];
+ const stream2 = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream2));
+ const track2 = stream2.getAudioTracks()[0];
+
+ pc1.addTrack(track1, stream1);
+ pc1.addTrack(track2, stream2);
+
+ await offerAnswer(pc1, pc2);
+
+ pc2.getTransceivers()[0].stop();
+
+ await offerAnswer(pc1, pc2);
+ await offerAnswer(pc2, pc1);
+ };
+
+ const checkMsectionReuse = async t => {
+ // Use max-compat to make it easier to check for disabled m-sections
+ const pc1 = new RTCPeerConnection({ bundlePolicy: "max-compat" });
+ const pc2 = new RTCPeerConnection({ bundlePolicy: "max-compat" });
+ t.add_cleanup(() => pc1.close());
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const track = stream.getAudioTracks()[0];
+ pc1.addTrack(track, stream);
+ const [pc1Transceiver] = pc1.getTransceivers();
+
+ await pc1.setLocalDescription();
+ await pc2.setRemoteDescription(pc1.localDescription);
+
+ // Answerer stops transceiver. The m-section is not immediately rejected
+ // (a follow-up O/A exchange is needed) but it should become inactive in
+ // the meantime.
+ const stoppedMid0 = pc2.getTransceivers()[0].mid;
+ const [pc2Transceiver] = pc2.getTransceivers();
+ pc2Transceiver.stop();
+ assert_equals(pc2.getTransceivers()[0].direction, "stopped");
+ assert_not_equals(pc2.getTransceivers()[0].currentDirection, "stopped");
+
+ await pc2.setLocalDescription();
+ await pc1.setRemoteDescription(pc2.localDescription);
+
+ // Still not stopped - but inactive is reflected!
+ assert_equals(pc1Transceiver.mid, stoppedMid0);
+ assert_equals(pc1Transceiver.direction, "sendrecv");
+ assert_equals(pc1Transceiver.currentDirection, "inactive");
+ assert_equals(pc2Transceiver.mid, stoppedMid0);
+ assert_equals(pc2Transceiver.direction, "stopped");
+ assert_equals(pc2Transceiver.currentDirection, "inactive");
+
+ // Now do the follow-up O/A exchange pc2 -> pc1.
+ await pc2.setLocalDescription();
+ await pc1.setRemoteDescription(pc2.localDescription);
+ await pc1.setLocalDescription();
+ await pc2.setRemoteDescription(pc1.localDescription);
+
+ // Now they're stopped, and have been removed from the PCs.
+ assert_equals(pc1.getTransceivers().length, 0);
+ assert_equals(pc2.getTransceivers().length, 0);
+ assert_equals(pc1Transceiver.mid, null);
+ assert_equals(pc1Transceiver.direction, "stopped");
+ assert_equals(pc1Transceiver.currentDirection, "stopped");
+ assert_equals(pc2Transceiver.mid, null);
+ assert_equals(pc2Transceiver.direction, "stopped");
+ assert_equals(pc2Transceiver.currentDirection, "stopped");
+
+ // Check that m-section is reused on both ends
+ const stream2 = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream2));
+ const track2 = stream2.getAudioTracks()[0];
+
+ pc1.addTrack(track2, stream2);
+ let offer = await pc1.createOffer();
+ assert_equals(offer.sdp.match(/m=/g).length, 1,
+ "Exactly one m-line in offer, because it was reused");
+ hasProps(pc1.getTransceivers(),
+ [
+ {
+ sender: {track: track2}
+ }
+ ]);
+
+ assert_not_equals(pc1.getTransceivers()[0].mid, stoppedMid0);
+
+ pc2.addTrack(track, stream);
+ offer = await pc2.createOffer();
+ assert_equals(offer.sdp.match(/m=/g).length, 1,
+ "Exactly one m-line in offer, because it was reused");
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ sender: {track}
+ }
+ ]);
+
+ assert_not_equals(pc2.getTransceivers()[0].mid, stoppedMid0);
+
+ await pc2.setLocalDescription(offer);
+ await pc1.setRemoteDescription(offer);
+ let answer = await pc1.createAnswer();
+ await pc1.setLocalDescription(answer);
+ await pc2.setRemoteDescription(answer);
+ hasPropsAndUniqueMids(pc1.getTransceivers(),
+ [
+ {
+ sender: {track: track2},
+ currentDirection: "sendrecv"
+ }
+ ]);
+
+ const mid0 = pc1.getTransceivers()[0].mid;
+
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ sender: {track},
+ currentDirection: "sendrecv",
+ mid: mid0
+ }
+ ]);
+
+ // stop the transceiver, and add a track. Verify that we don't reuse
+ // prematurely in our offer. (There should be one rejected m-section, and a
+ // new one for the new track)
+ const stoppedMid1 = pc1.getTransceivers()[0].mid;
+ pc1.getTransceivers()[0].stop();
+ const stream3 = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream3));
+ const track3 = stream3.getAudioTracks()[0];
+ pc1.addTrack(track3, stream3);
+ offer = await pc1.createOffer();
+ assert_equals(offer.sdp.match(/m=/g).length, 2,
+ "Exactly 2 m-lines in offer, because it is too early to reuse");
+ assert_equals(offer.sdp.match(/m=audio 0 /g).length, 1,
+ "One m-line is rejected");
+
+ await pc1.setLocalDescription(offer);
+
+ let trackEvents = await setRemoteDescriptionReturnTrackEvents(pc2, offer);
+ hasProps(trackEvents,
+ [
+ {
+ track: pc2.getTransceivers()[1].receiver.track,
+ streams: [{id: stream3.id}]
+ }
+ ]);
+
+ answer = await pc2.createAnswer();
+ await pc2.setLocalDescription(answer);
+
+ trackEvents = await setRemoteDescriptionReturnTrackEvents(pc1, answer);
+ hasProps(trackEvents, []);
+
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {
+ sender: {track: null},
+ currentDirection: "recvonly"
+ }
+ ]);
+
+ // Verify that we don't reuse the mid from the stopped transceiver
+ const mid1 = pc2.getTransceivers()[0].mid;
+ assert_not_equals(mid1, stoppedMid1);
+
+ pc2.addTrack(track3, stream3);
+ // There are two ways to handle this new track; reuse the recvonly
+ // transceiver created above, or create a new transceiver and reuse the
+ // disabled m-section. We're supposed to do the former.
+ offer = await pc2.createOffer();
+ assert_equals(offer.sdp.match(/m=/g).length, 2, "Exactly 2 m-lines in offer");
+ assert_equals(offer.sdp.match(/m=audio 0 /g).length, 1,
+ "One m-line is rejected, because the other was used");
+
+ hasProps(pc2.getTransceivers(),
+ [
+ {
+ mid: mid1,
+ sender: {track: track3},
+ currentDirection: "recvonly",
+ direction: "sendrecv"
+ }
+ ]);
+
+ // Add _another_ track; this should reuse the disabled m-section
+ const stream4 = await getNoiseStream({audio: true});
+ t.add_cleanup(() => stopTracks(stream4));
+ const track4 = stream4.getAudioTracks()[0];
+ pc2.addTrack(track4, stream4);
+ offer = await pc2.createOffer();
+ await pc2.setLocalDescription(offer);
+ hasPropsAndUniqueMids(pc2.getTransceivers(),
+ [
+ {
+ mid: mid1
+ },
+ {
+ sender: {track: track4},
+ }
+ ]);
+
+ // Fourth transceiver should have a new mid
+ assert_not_equals(pc2.getTransceivers()[1].mid, stoppedMid0);
+ assert_not_equals(pc2.getTransceivers()[1].mid, stoppedMid1);
+
+ assert_equals(offer.sdp.match(/m=/g).length, 2,
+ "Exactly 2 m-lines in offer, because m-section was reused");
+ assert_equals(offer.sdp.match(/m=audio 0 /g), null,
+ "No rejected m-line, because it was reused");
+ };
+
+ const checkStopAfterCreateOfferWithReusedMsection = async t => {
+ const pc1 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true, video: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const audio = stream.getAudioTracks()[0];
+ const video = stream.getVideoTracks()[0];
+
+ pc1.addTrack(audio, stream);
+ pc1.addTrack(video, stream);
+
+ await offerAnswer(pc1, pc2);
+ pc1.getTransceivers()[1].stop();
+ await offerAnswer(pc1, pc2);
+
+ // Second (video) m-section has been negotiated disabled.
+ const transceiver = pc1.addTransceiver("video");
+ const offer = await pc1.createOffer();
+ transceiver.stop();
+ await pc1.setLocalDescription(offer);
+ await pc2.setRemoteDescription(offer);
+
+ const answer = await pc2.createAnswer();
+ await pc2.setLocalDescription(answer);
+ await pc1.setRemoteDescription(answer);
+ };
+
+ const checkAddIceCandidateToStoppedTransceiver = async t => {
+ const pc1 = new RTCPeerConnection();
+ t.add_cleanup(() => pc1.close());
+ const pc2 = new RTCPeerConnection();
+ t.add_cleanup(() => pc2.close());
+
+ const stream = await getNoiseStream({audio: true, video: true});
+ t.add_cleanup(() => stopTracks(stream));
+ const audio = stream.getAudioTracks()[0];
+ const video = stream.getVideoTracks()[0];
+
+ pc1.addTrack(audio, stream);
+ pc1.addTrack(video, stream);
+
+ pc2.addTrack(audio, stream);
+ pc2.addTrack(video, stream);
+
+ await pc1.setLocalDescription(await pc1.createOffer());
+ pc1.getTransceivers()[1].stop();
+ pc1.setLocalDescription({type: "rollback"});
+
+ const offer = await pc2.createOffer();
+ await pc2.setLocalDescription(offer);
+ await pc1.setRemoteDescription(offer);
+
+ await pc1.addIceCandidate(
+ {
+ candidate: "candidate:0 1 UDP 2122252543 192.168.1.112 64261 typ host",
+ sdpMid: pc2.getTransceivers()[1].mid
+ });
+ };
+
+const tests = [
+ checkAddTransceiverNoTrack,
+ checkAddTransceiverWithTrack,
+ checkAddTransceiverWithAddTrack,
+ checkAddTransceiverWithDirection,
+ checkAddTransceiverWithSetRemoteOfferSending,
+ checkAddTransceiverWithSetRemoteOfferNoSend,
+ checkAddTransceiverBadKind,
+ checkNoMidOffer,
+ checkNoMidAnswer,
+ checkSetDirection,
+ checkCurrentDirection,
+ checkSendrecvWithNoSendTrack,
+ checkSendrecvWithTracklessStream,
+ checkAddTransceiverNoTrackDoesntPair,
+ checkAddTransceiverWithTrackDoesntPair,
+ checkAddTransceiverThenReplaceTrackDoesntPair,
+ checkAddTransceiverThenAddTrackPairs,
+ checkAddTrackPairs,
+ checkReplaceTrackNullDoesntPreventPairing,
+ checkRemoveAndReadd,
+ checkAddTrackExistingTransceiverThenRemove,
+ checkRemoveTrackNegotiation,
+ checkMute,
+ checkStop,
+ checkStopAfterCreateOffer,
+ checkStopAfterSetLocalOffer,
+ checkStopAfterSetRemoteOffer,
+ checkStopAfterCreateAnswer,
+ checkStopAfterSetLocalAnswer,
+ checkStopAfterClose,
+ checkLocalRollback,
+ checkRollbackAndSetRemoteOfferWithDifferentType,
+ checkRemoteRollback,
+ checkMsectionReuse,
+ checkStopAfterCreateOfferWithReusedMsection,
+ checkAddIceCandidateToStoppedTransceiver,
+ checkBundleTagRejected
+].forEach(test => promise_test(test, test.name));
+
+</script>