blob: 09d2dbe216b254f5a7d454751f6cf1423adf1e0a [file] [log] [blame]
/*
* Copyright 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <memory>
#include <vector>
#include "api/audio_codecs/builtin_audio_decoder_factory.h"
#include "api/audio_codecs/builtin_audio_encoder_factory.h"
#include "api/fakemetricsobserver.h"
#include "api/jsep.h"
#include "api/mediastreaminterface.h"
#include "api/peerconnectioninterface.h"
#include "pc/mediastream.h"
#include "pc/mediastreamtrack.h"
#include "pc/peerconnectionwrapper.h"
#include "pc/sdputils.h"
#include "pc/test/fakeaudiocapturemodule.h"
#include "pc/test/mockpeerconnectionobservers.h"
#include "rtc_base/checks.h"
#include "rtc_base/gunit.h"
#include "rtc_base/ptr_util.h"
#include "rtc_base/refcountedobject.h"
#include "rtc_base/scoped_ref_ptr.h"
#include "rtc_base/thread.h"
#include "test/gmock.h"
// This file contains tests for RTP Media API-related behavior of
// |webrtc::PeerConnection|, see https://w3c.github.io/webrtc-pc/#rtp-media-api.
namespace webrtc {
using RTCConfiguration = PeerConnectionInterface::RTCConfiguration;
using ::testing::ElementsAre;
using ::testing::UnorderedElementsAre;
const uint32_t kDefaultTimeout = 10000u;
template <typename MethodFunctor>
class OnSuccessObserver : public rtc::RefCountedObject<
webrtc::SetRemoteDescriptionObserverInterface> {
public:
explicit OnSuccessObserver(MethodFunctor on_success)
: on_success_(std::move(on_success)) {}
// webrtc::SetRemoteDescriptionObserverInterface implementation.
void OnSetRemoteDescriptionComplete(webrtc::RTCError error) override {
RTC_CHECK(error.ok());
on_success_();
}
private:
MethodFunctor on_success_;
};
class PeerConnectionRtpTest : public testing::Test {
public:
PeerConnectionRtpTest()
: pc_factory_(
CreatePeerConnectionFactory(rtc::Thread::Current(),
rtc::Thread::Current(),
rtc::Thread::Current(),
FakeAudioCaptureModule::Create(),
CreateBuiltinAudioEncoderFactory(),
CreateBuiltinAudioDecoderFactory(),
nullptr,
nullptr)) {}
std::unique_ptr<PeerConnectionWrapper> CreatePeerConnection() {
return CreatePeerConnection(RTCConfiguration());
}
std::unique_ptr<PeerConnectionWrapper> CreatePeerConnectionWithPlanB() {
RTCConfiguration config;
config.sdp_semantics = SdpSemantics::kPlanB;
return CreatePeerConnection(config);
}
std::unique_ptr<PeerConnectionWrapper> CreatePeerConnectionWithUnifiedPlan() {
RTCConfiguration config;
config.sdp_semantics = SdpSemantics::kUnifiedPlan;
return CreatePeerConnection(config);
}
std::unique_ptr<PeerConnectionWrapper> CreatePeerConnection(
const RTCConfiguration& config) {
auto observer = rtc::MakeUnique<MockPeerConnectionObserver>();
auto pc = pc_factory_->CreatePeerConnection(config, nullptr, nullptr,
observer.get());
return rtc::MakeUnique<PeerConnectionWrapper>(pc_factory_, pc,
std::move(observer));
}
protected:
rtc::scoped_refptr<PeerConnectionFactoryInterface> pc_factory_;
};
// These tests cover |webrtc::PeerConnectionObserver| callbacks firing upon
// setting the remote description.
class PeerConnectionRtpCallbacksTest : public PeerConnectionRtpTest {};
TEST_F(PeerConnectionRtpCallbacksTest, AddTrackWithoutStreamFiresOnAddTrack) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
ASSERT_TRUE(caller->AddTrack(caller->CreateAudioTrack("audio_track")));
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
ASSERT_EQ(callee->observer()->add_track_events_.size(), 1u);
// TODO(hbos): When "no stream" is handled correctly we would expect
// |add_track_events_[0].streams| to be empty. https://crbug.com/webrtc/7933
auto& add_track_event = callee->observer()->add_track_events_[0];
ASSERT_EQ(add_track_event.streams.size(), 1u);
EXPECT_TRUE(add_track_event.streams[0]->FindAudioTrack("audio_track"));
EXPECT_EQ(add_track_event.streams, add_track_event.receiver->streams());
}
TEST_F(PeerConnectionRtpCallbacksTest, AddTrackWithStreamFiresOnAddTrack) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
ASSERT_TRUE(caller->AddTrack(caller->CreateAudioTrack("audio_track"),
{"audio_stream"}));
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
ASSERT_EQ(callee->observer()->add_track_events_.size(), 1u);
auto& add_track_event = callee->observer()->add_track_events_[0];
ASSERT_EQ(add_track_event.streams.size(), 1u);
EXPECT_EQ("audio_stream", add_track_event.streams[0]->label());
EXPECT_TRUE(add_track_event.streams[0]->FindAudioTrack("audio_track"));
EXPECT_EQ(add_track_event.streams, add_track_event.receiver->streams());
}
TEST_F(PeerConnectionRtpCallbacksTest,
RemoveTrackWithoutStreamFiresOnRemoveTrack) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
auto sender = caller->AddTrack(caller->CreateAudioTrack("audio_track"), {});
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
ASSERT_EQ(callee->observer()->add_track_events_.size(), 1u);
EXPECT_TRUE(caller->pc()->RemoveTrack(sender));
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
ASSERT_EQ(callee->observer()->add_track_events_.size(), 1u);
EXPECT_EQ(callee->observer()->GetAddTrackReceivers(),
callee->observer()->remove_track_events_);
}
TEST_F(PeerConnectionRtpCallbacksTest,
RemoveTrackWithStreamFiresOnRemoveTrack) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
auto sender = caller->AddTrack(caller->CreateAudioTrack("audio_track"),
{"audio_stream"});
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
ASSERT_EQ(callee->observer()->add_track_events_.size(), 1u);
EXPECT_TRUE(caller->pc()->RemoveTrack(sender));
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
ASSERT_EQ(callee->observer()->add_track_events_.size(), 1u);
EXPECT_EQ(callee->observer()->GetAddTrackReceivers(),
callee->observer()->remove_track_events_);
}
TEST_F(PeerConnectionRtpCallbacksTest,
RemoveTrackWithSharedStreamFiresOnRemoveTrack) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
const char kSharedStreamLabel[] = "shared_audio_stream";
auto sender1 = caller->AddTrack(caller->CreateAudioTrack("audio_track1"),
{kSharedStreamLabel});
auto sender2 = caller->AddTrack(caller->CreateAudioTrack("audio_track2"),
{kSharedStreamLabel});
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
ASSERT_EQ(callee->observer()->add_track_events_.size(), 2u);
// Remove "audio_track1".
EXPECT_TRUE(caller->pc()->RemoveTrack(sender1));
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
ASSERT_EQ(callee->observer()->add_track_events_.size(), 2u);
EXPECT_EQ(
std::vector<rtc::scoped_refptr<RtpReceiverInterface>>{
callee->observer()->add_track_events_[0].receiver},
callee->observer()->remove_track_events_);
// Remove "audio_track2".
EXPECT_TRUE(caller->pc()->RemoveTrack(sender2));
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
ASSERT_EQ(callee->observer()->add_track_events_.size(), 2u);
EXPECT_EQ(callee->observer()->GetAddTrackReceivers(),
callee->observer()->remove_track_events_);
}
// Tests that setting a remote description with sending transceivers will fire
// the OnTrack callback for each transceiver and setting a remote description
// with receive only transceivers will not call OnTrack.
TEST_F(PeerConnectionRtpCallbacksTest, UnifiedPlanAddTransceiverCallsOnTrack) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto callee = CreatePeerConnectionWithUnifiedPlan();
auto audio_transceiver = caller->AddTransceiver(cricket::MEDIA_TYPE_AUDIO);
auto video_transceiver = caller->AddTransceiver(cricket::MEDIA_TYPE_VIDEO);
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
ASSERT_EQ(0u, caller->observer()->on_track_transceivers_.size());
ASSERT_EQ(2u, callee->observer()->on_track_transceivers_.size());
EXPECT_EQ(audio_transceiver->mid(),
callee->pc()->GetTransceivers()[0]->mid());
EXPECT_EQ(video_transceiver->mid(),
callee->pc()->GetTransceivers()[1]->mid());
}
// Test that doing additional offer/answer exchanges with no changes to tracks
// will cause no additional OnTrack calls after the tracks have been negotiated.
TEST_F(PeerConnectionRtpCallbacksTest, UnifiedPlanReofferDoesNotCallOnTrack) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto callee = CreatePeerConnectionWithUnifiedPlan();
caller->AddAudioTrack("audio");
callee->AddAudioTrack("audio");
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
EXPECT_EQ(1u, caller->observer()->on_track_transceivers_.size());
EXPECT_EQ(1u, callee->observer()->on_track_transceivers_.size());
// If caller reoffers with no changes expect no additional OnTrack calls.
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
EXPECT_EQ(1u, caller->observer()->on_track_transceivers_.size());
EXPECT_EQ(1u, callee->observer()->on_track_transceivers_.size());
// Also if callee reoffers with no changes expect no additional OnTrack calls.
ASSERT_TRUE(callee->ExchangeOfferAnswerWith(caller.get()));
EXPECT_EQ(1u, caller->observer()->on_track_transceivers_.size());
EXPECT_EQ(1u, callee->observer()->on_track_transceivers_.size());
}
// Test that OnTrack is called when the transceiver direction changes to send
// the track.
TEST_F(PeerConnectionRtpCallbacksTest, UnifiedPlanSetDirectionCallsOnTrack) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto callee = CreatePeerConnectionWithUnifiedPlan();
auto transceiver = caller->AddTransceiver(cricket::MEDIA_TYPE_AUDIO);
transceiver->SetDirection(RtpTransceiverDirection::kInactive);
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
EXPECT_EQ(0u, caller->observer()->on_track_transceivers_.size());
EXPECT_EQ(0u, callee->observer()->on_track_transceivers_.size());
transceiver->SetDirection(RtpTransceiverDirection::kSendOnly);
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
EXPECT_EQ(0u, caller->observer()->on_track_transceivers_.size());
EXPECT_EQ(1u, callee->observer()->on_track_transceivers_.size());
// If the direction changes but it is still receiving on the remote side, then
// OnTrack should not be fired again.
transceiver->SetDirection(RtpTransceiverDirection::kSendRecv);
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
EXPECT_EQ(0u, caller->observer()->on_track_transceivers_.size());
EXPECT_EQ(1u, callee->observer()->on_track_transceivers_.size());
}
// Test that OnTrack is called twice when a sendrecv call is started, the callee
// changes the direction to inactive, then changes it back to sendrecv.
TEST_F(PeerConnectionRtpCallbacksTest,
UnifiedPlanSetDirectionHoldCallsOnTrackTwice) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto callee = CreatePeerConnectionWithUnifiedPlan();
auto transceiver = caller->AddTransceiver(cricket::MEDIA_TYPE_AUDIO);
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
EXPECT_EQ(0u, caller->observer()->on_track_transceivers_.size());
EXPECT_EQ(1u, callee->observer()->on_track_transceivers_.size());
// Put the call on hold by no longer receiving the track.
callee->pc()->GetTransceivers()[0]->SetDirection(
RtpTransceiverDirection::kInactive);
ASSERT_TRUE(callee->ExchangeOfferAnswerWith(caller.get()));
EXPECT_EQ(0u, caller->observer()->on_track_transceivers_.size());
EXPECT_EQ(1u, callee->observer()->on_track_transceivers_.size());
// Resume the call by changing the direction to recvonly. This should call
// OnTrack again on the callee side.
callee->pc()->GetTransceivers()[0]->SetDirection(
RtpTransceiverDirection::kRecvOnly);
ASSERT_TRUE(callee->ExchangeOfferAnswerWith(caller.get()));
EXPECT_EQ(0u, caller->observer()->on_track_transceivers_.size());
EXPECT_EQ(2u, callee->observer()->on_track_transceivers_.size());
}
// These tests examine the state of the peer connection as a result of
// performing SetRemoteDescription().
class PeerConnectionRtpObserverTest : public PeerConnectionRtpTest {};
TEST_F(PeerConnectionRtpObserverTest, AddSenderWithoutStreamAddsReceiver) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
ASSERT_TRUE(caller->AddTrack(caller->CreateAudioTrack("audio_track"), {}));
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
EXPECT_EQ(callee->pc()->GetReceivers().size(), 1u);
auto receiver_added = callee->pc()->GetReceivers()[0];
EXPECT_EQ("audio_track", receiver_added->track()->id());
// TODO(hbos): When "no stream" is handled correctly we would expect
// |receiver_added->streams()| to be empty. https://crbug.com/webrtc/7933
EXPECT_EQ(receiver_added->streams().size(), 1u);
EXPECT_TRUE(receiver_added->streams()[0]->FindAudioTrack("audio_track"));
}
TEST_F(PeerConnectionRtpObserverTest, AddSenderWithStreamAddsReceiver) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
ASSERT_TRUE(caller->AddTrack(caller->CreateAudioTrack("audio_track"),
{"audio_stream"}));
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
EXPECT_EQ(callee->pc()->GetReceivers().size(), 1u);
auto receiver_added = callee->pc()->GetReceivers()[0];
EXPECT_EQ("audio_track", receiver_added->track()->id());
EXPECT_EQ(receiver_added->streams().size(), 1u);
EXPECT_EQ("audio_stream", receiver_added->streams()[0]->label());
EXPECT_TRUE(receiver_added->streams()[0]->FindAudioTrack("audio_track"));
}
TEST_F(PeerConnectionRtpObserverTest,
RemoveSenderWithoutStreamRemovesReceiver) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
auto sender = caller->AddTrack(caller->CreateAudioTrack("audio_track"), {});
ASSERT_TRUE(sender);
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
ASSERT_EQ(callee->pc()->GetReceivers().size(), 1u);
auto receiver = callee->pc()->GetReceivers()[0];
ASSERT_TRUE(caller->pc()->RemoveTrack(sender));
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
// TODO(hbos): When we implement Unified Plan, receivers will not be removed.
// Instead, the transceiver owning the receiver will become inactive.
EXPECT_EQ(callee->pc()->GetReceivers().size(), 0u);
}
TEST_F(PeerConnectionRtpObserverTest, RemoveSenderWithStreamRemovesReceiver) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
auto sender = caller->AddTrack(caller->CreateAudioTrack("audio_track"),
{"audio_stream"});
ASSERT_TRUE(sender);
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
ASSERT_EQ(callee->pc()->GetReceivers().size(), 1u);
auto receiver = callee->pc()->GetReceivers()[0];
ASSERT_TRUE(caller->pc()->RemoveTrack(sender));
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
// TODO(hbos): When we implement Unified Plan, receivers will not be removed.
// Instead, the transceiver owning the receiver will become inactive.
EXPECT_EQ(callee->pc()->GetReceivers().size(), 0u);
}
TEST_F(PeerConnectionRtpObserverTest,
RemoveSenderWithSharedStreamRemovesReceiver) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
const char kSharedStreamLabel[] = "shared_audio_stream";
auto sender1 = caller->AddTrack(caller->CreateAudioTrack("audio_track1"),
{kSharedStreamLabel});
auto sender2 = caller->AddTrack(caller->CreateAudioTrack("audio_track2"),
{kSharedStreamLabel});
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
ASSERT_EQ(callee->pc()->GetReceivers().size(), 2u);
rtc::scoped_refptr<webrtc::RtpReceiverInterface> receiver1;
rtc::scoped_refptr<webrtc::RtpReceiverInterface> receiver2;
if (callee->pc()->GetReceivers()[0]->track()->id() == "audio_track1") {
receiver1 = callee->pc()->GetReceivers()[0];
receiver2 = callee->pc()->GetReceivers()[1];
} else {
receiver1 = callee->pc()->GetReceivers()[1];
receiver2 = callee->pc()->GetReceivers()[0];
}
EXPECT_EQ("audio_track1", receiver1->track()->id());
EXPECT_EQ("audio_track2", receiver2->track()->id());
// Remove "audio_track1".
EXPECT_TRUE(caller->pc()->RemoveTrack(sender1));
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
// Only |receiver2| should remain.
// TODO(hbos): When we implement Unified Plan, receivers will not be removed.
// Instead, the transceiver owning the receiver will become inactive.
EXPECT_EQ(
std::vector<rtc::scoped_refptr<webrtc::RtpReceiverInterface>>{receiver2},
callee->pc()->GetReceivers());
// Remove "audio_track2".
EXPECT_TRUE(caller->pc()->RemoveTrack(sender2));
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(),
static_cast<webrtc::RTCError*>(nullptr)));
// TODO(hbos): When we implement Unified Plan, receivers will not be removed.
// Instead, the transceiver owning the receiver will become inactive.
EXPECT_EQ(callee->pc()->GetReceivers().size(), 0u);
}
// Invokes SetRemoteDescription() twice in a row without synchronizing the two
// calls and examine the state of the peer connection inside the callbacks to
// ensure that the second call does not occur prematurely, contaminating the
// state of the peer connection of the first callback.
TEST_F(PeerConnectionRtpObserverTest,
StatesCorrelateWithSetRemoteDescriptionCall) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
// Create SDP for adding a track and for removing it. This will be used in the
// first and second SetRemoteDescription() calls.
auto sender = caller->AddTrack(caller->CreateAudioTrack("audio_track"), {});
auto srd1_sdp = caller->CreateOfferAndSetAsLocal();
EXPECT_TRUE(caller->pc()->RemoveTrack(sender));
auto srd2_sdp = caller->CreateOfferAndSetAsLocal();
// In the first SetRemoteDescription() callback, check that we have a
// receiver for the track.
auto pc = callee->pc();
bool srd1_callback_called = false;
auto srd1_callback = [&srd1_callback_called, &pc]() {
EXPECT_EQ(pc->GetReceivers().size(), 1u);
srd1_callback_called = true;
};
// In the second SetRemoteDescription() callback, check that the receiver has
// been removed.
// TODO(hbos): When we implement Unified Plan, receivers will not be removed.
// Instead, the transceiver owning the receiver will become inactive.
// https://crbug.com/webrtc/7600
bool srd2_callback_called = false;
auto srd2_callback = [&srd2_callback_called, &pc]() {
EXPECT_TRUE(pc->GetReceivers().empty());
srd2_callback_called = true;
};
// Invoke SetRemoteDescription() twice in a row without synchronizing the two
// calls. The callbacks verify that the two calls are synchronized, as in, the
// effects of the second SetRemoteDescription() call must not have happened by
// the time the first callback is invoked. If it has then the receiver that is
// added as a result of the first SetRemoteDescription() call will already
// have been removed as a result of the second SetRemoteDescription() call
// when the first callback is invoked.
callee->pc()->SetRemoteDescription(
std::move(srd1_sdp),
new OnSuccessObserver<decltype(srd1_callback)>(srd1_callback));
callee->pc()->SetRemoteDescription(
std::move(srd2_sdp),
new OnSuccessObserver<decltype(srd2_callback)>(srd2_callback));
EXPECT_TRUE_WAIT(srd1_callback_called, kDefaultTimeout);
EXPECT_TRUE_WAIT(srd2_callback_called, kDefaultTimeout);
}
// Tests for the legacy SetRemoteDescription() function signature.
class PeerConnectionRtpLegacyObserverTest : public PeerConnectionRtpTest {};
// Sanity test making sure the callback is invoked.
TEST_F(PeerConnectionRtpLegacyObserverTest, OnSuccess) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
std::string error;
ASSERT_TRUE(
callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal(), &error));
}
// Verifies legacy behavior: The observer is not called if if the peer
// connection is destroyed because the asynchronous callback is executed in the
// peer connection's message handler.
TEST_F(PeerConnectionRtpLegacyObserverTest,
ObserverNotCalledIfPeerConnectionDereferenced) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
rtc::scoped_refptr<webrtc::MockSetSessionDescriptionObserver> observer =
new rtc::RefCountedObject<webrtc::MockSetSessionDescriptionObserver>();
auto offer = caller->CreateOfferAndSetAsLocal();
callee->pc()->SetRemoteDescription(observer, offer.release());
callee = nullptr;
rtc::Thread::Current()->ProcessMessages(0);
EXPECT_FALSE(observer->called());
}
// RtpTransceiver Tests.
// Test that by default there are no transceivers with Unified Plan.
TEST_F(PeerConnectionRtpTest, PeerConnectionHasNoTransceivers) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
EXPECT_THAT(caller->pc()->GetTransceivers(), ElementsAre());
}
// Test that a transceiver created with the audio kind has the correct initial
// properties.
TEST_F(PeerConnectionRtpTest, AddTransceiverHasCorrectInitProperties) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto transceiver = caller->AddTransceiver(cricket::MEDIA_TYPE_AUDIO);
EXPECT_EQ(rtc::nullopt, transceiver->mid());
EXPECT_FALSE(transceiver->stopped());
EXPECT_EQ(RtpTransceiverDirection::kSendRecv, transceiver->direction());
EXPECT_EQ(rtc::nullopt, transceiver->current_direction());
}
// Test that adding a transceiver with the audio kind creates an audio sender
// and audio receiver with the receiver having a live audio track.
TEST_F(PeerConnectionRtpTest,
AddAudioTransceiverCreatesAudioSenderAndReceiver) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto transceiver = caller->AddTransceiver(cricket::MEDIA_TYPE_AUDIO);
EXPECT_EQ(cricket::MEDIA_TYPE_AUDIO, transceiver->media_type());
ASSERT_TRUE(transceiver->sender());
EXPECT_EQ(cricket::MEDIA_TYPE_AUDIO, transceiver->sender()->media_type());
ASSERT_TRUE(transceiver->receiver());
EXPECT_EQ(cricket::MEDIA_TYPE_AUDIO, transceiver->receiver()->media_type());
auto track = transceiver->receiver()->track();
ASSERT_TRUE(track);
EXPECT_EQ(MediaStreamTrackInterface::kAudioKind, track->kind());
EXPECT_EQ(MediaStreamTrackInterface::TrackState::kLive, track->state());
}
// Test that adding a transceiver with the video kind creates an video sender
// and video receiver with the receiver having a live video track.
TEST_F(PeerConnectionRtpTest,
AddAudioTransceiverCreatesVideoSenderAndReceiver) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto transceiver = caller->AddTransceiver(cricket::MEDIA_TYPE_VIDEO);
EXPECT_EQ(cricket::MEDIA_TYPE_VIDEO, transceiver->media_type());
ASSERT_TRUE(transceiver->sender());
EXPECT_EQ(cricket::MEDIA_TYPE_VIDEO, transceiver->sender()->media_type());
ASSERT_TRUE(transceiver->receiver());
EXPECT_EQ(cricket::MEDIA_TYPE_VIDEO, transceiver->receiver()->media_type());
auto track = transceiver->receiver()->track();
ASSERT_TRUE(track);
EXPECT_EQ(MediaStreamTrackInterface::kVideoKind, track->kind());
EXPECT_EQ(MediaStreamTrackInterface::TrackState::kLive, track->state());
}
// Test that after a call to AddTransceiver, the transceiver shows in
// GetTransceivers(), the transceiver's sender shows in GetSenders(), and the
// transceiver's receiver shows in GetReceivers().
TEST_F(PeerConnectionRtpTest, AddTransceiverShowsInLists) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto transceiver = caller->AddTransceiver(cricket::MEDIA_TYPE_AUDIO);
EXPECT_EQ(
std::vector<rtc::scoped_refptr<RtpTransceiverInterface>>{transceiver},
caller->pc()->GetTransceivers());
EXPECT_EQ(
std::vector<rtc::scoped_refptr<RtpSenderInterface>>{
transceiver->sender()},
caller->pc()->GetSenders());
EXPECT_EQ(
std::vector<rtc::scoped_refptr<RtpReceiverInterface>>{
transceiver->receiver()},
caller->pc()->GetReceivers());
}
// Test that the direction passed in through the AddTransceiver init parameter
// is set in the returned transceiver.
TEST_F(PeerConnectionRtpTest, AddTransceiverWithDirectionIsReflected) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
RtpTransceiverInit init;
init.direction = RtpTransceiverDirection::kSendOnly;
auto transceiver = caller->AddTransceiver(cricket::MEDIA_TYPE_AUDIO, init);
EXPECT_EQ(RtpTransceiverDirection::kSendOnly, transceiver->direction());
}
// Test that calling AddTransceiver with a track creates a transceiver which has
// its sender's track set to the passed-in track.
TEST_F(PeerConnectionRtpTest, AddTransceiverWithTrackCreatesSenderWithTrack) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto audio_track = caller->CreateAudioTrack("audio track");
auto transceiver = caller->AddTransceiver(audio_track);
auto sender = transceiver->sender();
ASSERT_TRUE(sender->track());
EXPECT_EQ(audio_track, sender->track());
auto receiver = transceiver->receiver();
ASSERT_TRUE(receiver->track());
EXPECT_EQ(MediaStreamTrackInterface::kAudioKind, receiver->track()->kind());
EXPECT_EQ(MediaStreamTrackInterface::TrackState::kLive,
receiver->track()->state());
}
// Test that calling AddTransceiver twice with the same track creates distinct
// transceivers, senders with the same track.
TEST_F(PeerConnectionRtpTest,
AddTransceiverTwiceWithSameTrackCreatesMultipleTransceivers) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto audio_track = caller->CreateAudioTrack("audio track");
auto transceiver1 = caller->AddTransceiver(audio_track);
auto transceiver2 = caller->AddTransceiver(audio_track);
EXPECT_NE(transceiver1, transceiver2);
auto sender1 = transceiver1->sender();
auto sender2 = transceiver2->sender();
EXPECT_NE(sender1, sender2);
EXPECT_EQ(audio_track, sender1->track());
EXPECT_EQ(audio_track, sender2->track());
EXPECT_THAT(caller->pc()->GetTransceivers(),
UnorderedElementsAre(transceiver1, transceiver2));
EXPECT_THAT(caller->pc()->GetSenders(),
UnorderedElementsAre(sender1, sender2));
}
// RtpTransceiver error handling tests.
TEST_F(PeerConnectionRtpTest, AddTransceiverWithInvalidKindReturnsError) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto result = caller->pc()->AddTransceiver(cricket::MEDIA_TYPE_DATA);
EXPECT_EQ(RTCErrorType::INVALID_PARAMETER, result.error().type());
}
TEST_F(PeerConnectionRtpTest, UnifiedPlanCanClosePeerConnection) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
caller->pc()->Close();
}
// Unified Plan AddTrack tests.
class PeerConnectionRtpUnifiedPlanTest : public PeerConnectionRtpTest {};
// Test that adding an audio track creates a new audio RtpSender with the given
// track.
TEST_F(PeerConnectionRtpUnifiedPlanTest, AddAudioTrackCreatesAudioSender) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto audio_track = caller->CreateAudioTrack("a");
auto sender = caller->AddTrack(audio_track);
ASSERT_TRUE(sender);
EXPECT_EQ(cricket::MEDIA_TYPE_AUDIO, sender->media_type());
EXPECT_EQ(audio_track, sender->track());
}
// Test that adding a video track creates a new video RtpSender with the given
// track.
TEST_F(PeerConnectionRtpUnifiedPlanTest, AddVideoTrackCreatesVideoSender) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto video_track = caller->CreateVideoTrack("a");
auto sender = caller->AddTrack(video_track);
ASSERT_TRUE(sender);
EXPECT_EQ(cricket::MEDIA_TYPE_VIDEO, sender->media_type());
EXPECT_EQ(video_track, sender->track());
}
// Test that adding a track to a new PeerConnection creates an RtpTransceiver
// with the sender that AddTrack returns and in the sendrecv direction.
TEST_F(PeerConnectionRtpUnifiedPlanTest, AddFirstTrackCreatesTransceiver) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto sender = caller->AddAudioTrack("a");
ASSERT_TRUE(sender);
auto transceivers = caller->pc()->GetTransceivers();
ASSERT_EQ(1u, transceivers.size());
EXPECT_EQ(sender, transceivers[0]->sender());
EXPECT_EQ(RtpTransceiverDirection::kSendRecv, transceivers[0]->direction());
}
// Test that if a transceiver of the same type but no track had been added to
// the PeerConnection and later a call to AddTrack is made, the resulting sender
// is the transceiver's sender and the sender's track is the newly-added track.
TEST_F(PeerConnectionRtpUnifiedPlanTest, AddTrackReusesTransceiver) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto transceiver = caller->AddTransceiver(cricket::MEDIA_TYPE_AUDIO);
auto audio_track = caller->CreateAudioTrack("a");
auto sender = caller->AddTrack(audio_track);
ASSERT_TRUE(sender);
auto transceivers = caller->pc()->GetTransceivers();
ASSERT_EQ(1u, transceivers.size());
EXPECT_EQ(transceiver, transceivers[0]);
EXPECT_EQ(sender, transceiver->sender());
EXPECT_EQ(audio_track, sender->track());
}
// Test that adding two tracks to a new PeerConnection creates two
// RtpTransceivers in the same order.
TEST_F(PeerConnectionRtpUnifiedPlanTest, TwoAddTrackCreatesTwoTransceivers) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto sender1 = caller->AddAudioTrack("a");
auto sender2 = caller->AddVideoTrack("v");
ASSERT_TRUE(sender2);
auto transceivers = caller->pc()->GetTransceivers();
ASSERT_EQ(2u, transceivers.size());
EXPECT_EQ(sender1, transceivers[0]->sender());
EXPECT_EQ(sender2, transceivers[1]->sender());
}
// Test that if there are multiple transceivers with no sending track then a
// later call to AddTrack will use the one of the same type as the newly-added
// track.
TEST_F(PeerConnectionRtpUnifiedPlanTest, AddTrackReusesTransceiverOfType) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto audio_transceiver = caller->AddTransceiver(cricket::MEDIA_TYPE_AUDIO);
auto video_transceiver = caller->AddTransceiver(cricket::MEDIA_TYPE_VIDEO);
auto sender = caller->AddVideoTrack("v");
ASSERT_EQ(2u, caller->pc()->GetTransceivers().size());
EXPECT_NE(sender, audio_transceiver->sender());
EXPECT_EQ(sender, video_transceiver->sender());
}
// Test that if the only transceivers that do not have a sending track have a
// different type from the added track, then AddTrack will create a new
// transceiver for the track.
TEST_F(PeerConnectionRtpUnifiedPlanTest,
AddTrackDoesNotReuseTransceiverOfWrongType) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
caller->AddTransceiver(cricket::MEDIA_TYPE_AUDIO);
auto sender = caller->AddVideoTrack("v");
auto transceivers = caller->pc()->GetTransceivers();
ASSERT_EQ(2u, transceivers.size());
EXPECT_NE(sender, transceivers[0]->sender());
EXPECT_EQ(sender, transceivers[1]->sender());
}
// Test that the first available transceiver is reused by AddTrack when multiple
// are available.
TEST_F(PeerConnectionRtpUnifiedPlanTest,
AddTrackReusesFirstMatchingTransceiver) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
caller->AddTransceiver(cricket::MEDIA_TYPE_AUDIO);
caller->AddTransceiver(cricket::MEDIA_TYPE_AUDIO);
auto sender = caller->AddAudioTrack("a");
auto transceivers = caller->pc()->GetTransceivers();
ASSERT_EQ(2u, transceivers.size());
EXPECT_EQ(sender, transceivers[0]->sender());
EXPECT_NE(sender, transceivers[1]->sender());
}
// Test that a call to AddTrack that reuses a transceiver will change the
// direction from inactive to sendonly.
TEST_F(PeerConnectionRtpUnifiedPlanTest,
AddTrackChangesDirectionFromInactiveToSendOnly) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
RtpTransceiverInit init;
init.direction = RtpTransceiverDirection::kInactive;
auto transceiver = caller->AddTransceiver(cricket::MEDIA_TYPE_AUDIO, init);
caller->observer()->clear_negotiation_needed();
ASSERT_TRUE(caller->AddAudioTrack("a"));
EXPECT_TRUE(caller->observer()->negotiation_needed());
EXPECT_EQ(RtpTransceiverDirection::kSendOnly, transceiver->direction());
}
// Test that a call to AddTrack that reuses a transceiver will change the
// direction from recvonly to sendrecv.
TEST_F(PeerConnectionRtpUnifiedPlanTest,
AddTrackChangesDirectionFromRecvOnlyToSendRecv) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
RtpTransceiverInit init;
init.direction = RtpTransceiverDirection::kRecvOnly;
auto transceiver = caller->AddTransceiver(cricket::MEDIA_TYPE_AUDIO, init);
caller->observer()->clear_negotiation_needed();
ASSERT_TRUE(caller->AddAudioTrack("a"));
EXPECT_TRUE(caller->observer()->negotiation_needed());
EXPECT_EQ(RtpTransceiverDirection::kSendRecv, transceiver->direction());
}
TEST_F(PeerConnectionRtpUnifiedPlanTest, AddTrackCreatesSenderWithTrackId) {
const std::string kTrackId = "audio_track";
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto audio_track = caller->CreateAudioTrack(kTrackId);
auto sender = caller->AddTrack(audio_track);
EXPECT_EQ(kTrackId, sender->id());
}
// Unified Plan AddTrack error handling.
TEST_F(PeerConnectionRtpUnifiedPlanTest, AddTrackErrorIfClosed) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto audio_track = caller->CreateAudioTrack("a");
caller->pc()->Close();
caller->observer()->clear_negotiation_needed();
auto result = caller->pc()
->AddTrack(audio_track, std::vector<std::string>());
EXPECT_EQ(RTCErrorType::INVALID_STATE, result.error().type());
EXPECT_FALSE(caller->observer()->negotiation_needed());
}
TEST_F(PeerConnectionRtpUnifiedPlanTest, AddTrackErrorIfTrackAlreadyHasSender) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto audio_track = caller->CreateAudioTrack("a");
ASSERT_TRUE(caller->AddTrack(audio_track));
caller->observer()->clear_negotiation_needed();
auto result = caller->pc()
->AddTrack(audio_track, std::vector<std::string>());
EXPECT_EQ(RTCErrorType::INVALID_PARAMETER, result.error().type());
EXPECT_FALSE(caller->observer()->negotiation_needed());
}
// Unified Plan RemoveTrack tests.
// Test that calling RemoveTrack on a sender with a previously-added track
// clears the sender's track.
TEST_F(PeerConnectionRtpUnifiedPlanTest, RemoveTrackClearsSenderTrack) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto sender = caller->AddAudioTrack("a");
ASSERT_TRUE(caller->pc()->RemoveTrack(sender));
EXPECT_FALSE(sender->track());
}
// Test that calling RemoveTrack on a sender where the transceiver is configured
// in the sendrecv direction changes the transceiver's direction to recvonly.
TEST_F(PeerConnectionRtpUnifiedPlanTest,
RemoveTrackChangesDirectionFromSendRecvToRecvOnly) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
RtpTransceiverInit init;
init.direction = RtpTransceiverDirection::kSendRecv;
auto transceiver =
caller->AddTransceiver(caller->CreateAudioTrack("a"), init);
caller->observer()->clear_negotiation_needed();
ASSERT_TRUE(caller->pc()->RemoveTrack(transceiver->sender()));
EXPECT_TRUE(caller->observer()->negotiation_needed());
EXPECT_EQ(RtpTransceiverDirection::kRecvOnly, transceiver->direction());
EXPECT_TRUE(caller->observer()->renegotiation_needed_);
}
// Test that calling RemoveTrack on a sender where the transceiver is configured
// in the sendonly direction changes the transceiver's direction to inactive.
TEST_F(PeerConnectionRtpUnifiedPlanTest,
RemoveTrackChangesDirectionFromSendOnlyToInactive) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
RtpTransceiverInit init;
init.direction = RtpTransceiverDirection::kSendOnly;
auto transceiver =
caller->AddTransceiver(caller->CreateAudioTrack("a"), init);
caller->observer()->clear_negotiation_needed();
ASSERT_TRUE(caller->pc()->RemoveTrack(transceiver->sender()));
EXPECT_TRUE(caller->observer()->negotiation_needed());
EXPECT_EQ(RtpTransceiverDirection::kInactive, transceiver->direction());
}
// Test that calling RemoveTrack with a sender that has a null track results in
// no change in state.
TEST_F(PeerConnectionRtpUnifiedPlanTest, RemoveTrackWithNullSenderTrackIsNoOp) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto sender = caller->AddAudioTrack("a");
auto transceiver = caller->pc()->GetTransceivers()[0];
ASSERT_TRUE(sender->SetTrack(nullptr));
caller->observer()->clear_negotiation_needed();
ASSERT_TRUE(caller->pc()->RemoveTrack(sender));
EXPECT_FALSE(caller->observer()->negotiation_needed());
EXPECT_EQ(RtpTransceiverDirection::kSendRecv, transceiver->direction());
}
// Unified Plan RemoveTrack error handling.
TEST_F(PeerConnectionRtpUnifiedPlanTest, RemoveTrackErrorIfClosed) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto sender = caller->AddAudioTrack("a");
caller->pc()->Close();
caller->observer()->clear_negotiation_needed();
EXPECT_FALSE(caller->pc()->RemoveTrack(sender));
EXPECT_FALSE(caller->observer()->negotiation_needed());
}
TEST_F(PeerConnectionRtpUnifiedPlanTest,
RemoveTrackNoErrorIfTrackAlreadyRemoved) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
auto sender = caller->AddAudioTrack("a");
ASSERT_TRUE(caller->pc()->RemoveTrack(sender));
caller->observer()->clear_negotiation_needed();
EXPECT_TRUE(caller->pc()->RemoveTrack(sender));
EXPECT_FALSE(caller->observer()->negotiation_needed());
}
// Test MSID signaling between Unified Plan and Plan B endpoints. There are two
// options for this kind of signaling: media section based (a=msid) and ssrc
// based (a=ssrc MSID). While JSEP only specifies media section MSID signaling,
// we want to ensure compatibility with older Plan B endpoints that might expect
// ssrc based MSID signaling. Thus we test here that Unified Plan offers both
// types but answers with the same type as the offer.
class PeerConnectionMsidSignalingTest : public PeerConnectionRtpTest {};
TEST_F(PeerConnectionMsidSignalingTest, UnifiedPlanTalkingToOurself) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
caller->AddAudioTrack("caller_audio");
auto callee = CreatePeerConnectionWithUnifiedPlan();
callee->AddAudioTrack("callee_audio");
auto caller_observer =
new rtc::RefCountedObject<webrtc::FakeMetricsObserver>();
caller->pc()->RegisterUMAObserver(caller_observer);
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
// Offer should have had both a=msid and a=ssrc MSID lines.
auto* offer = callee->pc()->remote_description();
EXPECT_EQ((cricket::kMsidSignalingMediaSection |
cricket::kMsidSignalingSsrcAttribute),
offer->description()->msid_signaling());
// Answer should have had only a=msid lines.
auto* answer = caller->pc()->remote_description();
EXPECT_EQ(cricket::kMsidSignalingMediaSection,
answer->description()->msid_signaling());
// Check that this is counted correctly
EXPECT_EQ(1, caller_observer->GetEnumCounter(
webrtc::kEnumCounterSdpSemanticNegotiated,
webrtc::kSdpSemanticNegotiatedUnifiedPlan));
EXPECT_EQ(0, caller_observer->GetEnumCounter(
webrtc::kEnumCounterSdpSemanticNegotiated,
webrtc::kSdpSemanticNegotiatedNone));
EXPECT_EQ(0, caller_observer->GetEnumCounter(
webrtc::kEnumCounterSdpSemanticNegotiated,
webrtc::kSdpSemanticNegotiatedPlanB));
EXPECT_EQ(0, caller_observer->GetEnumCounter(
webrtc::kEnumCounterSdpSemanticNegotiated,
webrtc::kSdpSemanticNegotiatedMixed));
}
TEST_F(PeerConnectionMsidSignalingTest, PlanBOfferToUnifiedPlanAnswer) {
auto caller = CreatePeerConnectionWithPlanB();
caller->AddAudioTrack("caller_audio");
auto callee = CreatePeerConnectionWithUnifiedPlan();
callee->AddAudioTrack("callee_audio");
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
// Offer should have only a=ssrc MSID lines.
auto* offer = callee->pc()->remote_description();
EXPECT_EQ(cricket::kMsidSignalingSsrcAttribute,
offer->description()->msid_signaling());
// Answer should have only a=ssrc MSID lines to match the offer.
auto* answer = caller->pc()->remote_description();
EXPECT_EQ(cricket::kMsidSignalingSsrcAttribute,
answer->description()->msid_signaling());
}
TEST_F(PeerConnectionMsidSignalingTest, PureUnifiedPlanToUs) {
auto caller = CreatePeerConnectionWithUnifiedPlan();
caller->AddAudioTrack("caller_audio");
auto callee = CreatePeerConnectionWithUnifiedPlan();
callee->AddAudioTrack("callee_audio");
auto offer = caller->CreateOffer();
// Simulate a pure Unified Plan offerer by setting the MSID signaling to media
// section only.
offer->description()->set_msid_signaling(cricket::kMsidSignalingMediaSection);
ASSERT_TRUE(
caller->SetLocalDescription(CloneSessionDescription(offer.get())));
ASSERT_TRUE(callee->SetRemoteDescription(std::move(offer)));
// Answer should have only a=msid to match the offer.
auto answer = callee->CreateAnswer();
EXPECT_EQ(cricket::kMsidSignalingMediaSection,
answer->description()->msid_signaling());
}
// Sender setups in a call.
class PeerConnectionSenderTest : public PeerConnectionRtpTest {};
TEST_F(PeerConnectionSenderTest, CreateTwoSendersWithSameTrack) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
auto track = caller->CreateAudioTrack("audio_track");
auto sender1 = caller->AddTrack(track);
ASSERT_TRUE(sender1);
// We need to temporarily reset the track for the subsequent AddTrack() to
// succeed.
EXPECT_TRUE(sender1->SetTrack(nullptr));
auto sender2 = caller->AddTrack(track);
EXPECT_TRUE(sender2);
EXPECT_TRUE(sender1->SetTrack(track));
// TODO(hbos): When https://crbug.com/webrtc/8734 is resolved, this should
// return true, and doing |callee->SetRemoteDescription()| should work.
EXPECT_FALSE(caller->CreateOfferAndSetAsLocal());
}
} // namespace webrtc