TrackMediaInfoMap added.

webrtc/api/trackmediainfomap_unittest.cc

+/*
+ *  Copyright 2016 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 "webrtc/api/trackmediainfomap.h"
+
+#include <initializer_list>
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "webrtc/api/audiotrack.h"
+#include "webrtc/api/rtpreceiverinterface.h"
+#include "webrtc/api/rtpsenderinterface.h"
+#include "webrtc/api/test/fakertpsenderreceiver.h"
+#include "webrtc/api/test/fakevideotracksource.h"
+#include "webrtc/api/videotrack.h"
+#include "webrtc/base/refcount.h"
+#include "webrtc/media/base/mediachannel.h"
+#include "webrtc/test/gtest.h"
+
+namespace webrtc {
+
+namespace {
+
+RtpParameters CreateRtpParametersWithSsrcs(
+    std::initializer_list<uint32_t> ssrcs) {
+  RtpParameters params;
+  for (uint32_t ssrc : ssrcs) {
+    RtpEncodingParameters encoding_params;
+    encoding_params.ssrc = rtc::Optional<uint32_t>(ssrc);
+    params.encodings.push_back(encoding_params);
+  }
+  return params;
+}
+
+TrackMediaInfoMap CreateAndInitializeMap(
+    std::unique_ptr<cricket::VoiceMediaInfo> voice_media_info,
+    std::unique_ptr<cricket::VideoMediaInfo> video_media_info,
+    const std::vector<rtc::scoped_refptr<RtpSenderInterface>>& rtp_senders,
+    const std::vector<rtc::scoped_refptr<RtpReceiverInterface>>&
+        rtp_receivers) {
+  TrackMediaInfoMap map(std::move(voice_media_info),
+                        std::move(video_media_info));
+  map.Initialize(rtp_senders, rtp_receivers);
+  return map;
+}
+
+}  // namespace
+
+TEST(TrackMediaInfoMapTest, SingleSenderAndReceiverWithOneSsrc) {
+  cricket::VoiceMediaInfo* voice_media_info = new cricket::VoiceMediaInfo();
+  cricket::VideoMediaInfo* video_media_info = new cricket::VideoMediaInfo();
+  std::vector<rtc::scoped_refptr<RtpSenderInterface>> rtp_senders;
+  std::vector<rtc::scoped_refptr<RtpReceiverInterface>> rtp_receivers;
+
+  // Local audio track and sender info using an RTP sender with SSRC 1.
+  rtc::scoped_refptr<AudioTrack> local_audio_track =
+      AudioTrack::Create("LocalAudioTrack", nullptr);
+
+  rtc::scoped_refptr<FakeRtpSender> audio_sender =
+      new FakeRtpSender(cricket::MEDIA_TYPE_AUDIO,
+                        CreateRtpParametersWithSsrcs({1}));
+  audio_sender->SetTrack(local_audio_track);
+  rtp_senders.push_back(audio_sender);
+
+  voice_media_info->senders.push_back(cricket::VoiceSenderInfo());
+  voice_media_info->senders[0].local_stats.push_back(cricket::SsrcSenderInfo());
+  voice_media_info->senders[0].local_stats[0].ssrc = 1;
+
+  // Remote audio track and receiver info using an RTP sender with SSRC 2.
+  rtc::scoped_refptr<AudioTrack> remote_audio_track =
+      AudioTrack::Create("RemoteAudioTrack", nullptr);
+
+  rtc::scoped_refptr<FakeRtpReceiver> audio_receiver =
+      new FakeRtpReceiver(cricket::MEDIA_TYPE_AUDIO,
+                          CreateRtpParametersWithSsrcs({2}));
+  audio_receiver->SetTrack(remote_audio_track);
+  rtp_receivers.push_back(audio_receiver);
+
+  voice_media_info->receivers.push_back(cricket::VoiceReceiverInfo());
+  voice_media_info->receivers[0].local_stats.push_back(
+      cricket::SsrcReceiverInfo());
+  voice_media_info->receivers[0].local_stats[0].ssrc = 2;
+
+  // Local video track and sender info using an RTP sender with SSRC 3.
+  rtc::scoped_refptr<VideoTrack> local_video_track =
+      VideoTrack::Create("LocalVideoTrack",
+                         FakeVideoTrackSource::Create(false));
+
+  rtc::scoped_refptr<FakeRtpSender> video_sender =
+      new FakeRtpSender(cricket::MEDIA_TYPE_VIDEO,
+                        CreateRtpParametersWithSsrcs({3}));
+  video_sender->SetTrack(local_video_track);
+  rtp_senders.push_back(video_sender);
+
+  video_media_info->senders.push_back(cricket::VideoSenderInfo());
+  video_media_info->senders[0].local_stats.push_back(cricket::SsrcSenderInfo());
+  video_media_info->senders[0].local_stats[0].ssrc = 3;
+
+  // Remote video track and receiver info using an RTP sender with SSRC 4.
+  rtc::scoped_refptr<VideoTrack> remote_video_track =
+      VideoTrack::Create("RemoteVideoTrack",
+                         FakeVideoTrackSource::Create(false));
+
+  rtc::scoped_refptr<FakeRtpReceiver> video_receiver =
+      new FakeRtpReceiver(cricket::MEDIA_TYPE_VIDEO,
+                          CreateRtpParametersWithSsrcs({4}));
+  video_receiver->SetTrack(remote_video_track);
+  rtp_receivers.push_back(video_receiver);
+
+  video_media_info->receivers.push_back(cricket::VideoReceiverInfo());
+  video_media_info->receivers[0].local_stats.push_back(
+      cricket::SsrcReceiverInfo());
+  video_media_info->receivers[0].local_stats[0].ssrc = 4;
+
+  TrackMediaInfoMap map = CreateAndInitializeMap(
+      std::unique_ptr<cricket::VoiceMediaInfo>(voice_media_info),
+      std::unique_ptr<cricket::VideoMediaInfo>(video_media_info),
+      rtp_senders,
+      rtp_receivers);
+
+  // Local audio track <-> RTP audio sender
+  ASSERT_TRUE(map.GetVoiceSenderInfos(*local_audio_track));
+  EXPECT_EQ(*map.GetVoiceSenderInfos(*local_audio_track),
+            std::vector<cricket::VoiceSenderInfo*>({
+                &voice_media_info->senders[0] }));
+  EXPECT_EQ(map.GetAudioTrack(voice_media_info->senders[0]),
+            local_audio_track.get());
+
+  // Remote audio track <-> RTP audio receiver
+  EXPECT_EQ(map.GetVoiceReceiverInfo(*remote_audio_track),
+            &voice_media_info->receivers[0]);
+  EXPECT_EQ(map.GetAudioTrack(voice_media_info->receivers[0]),
+            remote_audio_track.get());
+
+  // Local video track <-> RTP video sender
+  ASSERT_TRUE(map.GetVideoSenderInfos(*local_video_track));
+  EXPECT_EQ(*map.GetVideoSenderInfos(*local_video_track),
+            std::vector<cricket::VideoSenderInfo*>({
+                &video_media_info->senders[0] }));
+  EXPECT_EQ(map.GetVideoTrack(video_media_info->senders[0]),
+            local_video_track.get());
+
+  // Remote video track <-> RTP video receiver
+  EXPECT_EQ(map.GetVideoReceiverInfo(*remote_video_track),
+            &video_media_info->receivers[0]);
+  EXPECT_EQ(map.GetVideoTrack(video_media_info->receivers[0]),
+            remote_video_track.get());
+}
+
+TEST(TrackMediaInfoMapTest, SingleSenderWithMissingSsrc) {
+  cricket::VoiceMediaInfo* voice_media_info = new cricket::VoiceMediaInfo();
+  cricket::VideoMediaInfo* video_media_info = new cricket::VideoMediaInfo();
+  std::vector<rtc::scoped_refptr<RtpSenderInterface>> rtp_senders;
+
+  // Local audio track and sender info using an RTP sender without an SSRC.
+  rtc::scoped_refptr<AudioTrack> local_audio_track =
+      AudioTrack::Create("LocalAudioTrack", nullptr);
+
+  rtc::scoped_refptr<FakeRtpSender> audio_sender =
+      new FakeRtpSender(cricket::MEDIA_TYPE_AUDIO,
+                        CreateRtpParametersWithSsrcs({}));
+  audio_sender->SetTrack(local_audio_track);
+  rtp_senders.push_back(audio_sender);
+
+  // Local video track and sender info using an RTP sender without an SSRC.
+  rtc::scoped_refptr<VideoTrack> local_video_track =
+      VideoTrack::Create("LocalVideoTrack",
+                         FakeVideoTrackSource::Create(false));
+
+  rtc::scoped_refptr<FakeRtpSender> video_sender =
+      new FakeRtpSender(cricket::MEDIA_TYPE_VIDEO,
+                        CreateRtpParametersWithSsrcs({}));
+  video_sender->SetTrack(local_video_track);
+  rtp_senders.push_back(video_sender);
+
+  TrackMediaInfoMap map = CreateAndInitializeMap(
+      std::unique_ptr<cricket::VoiceMediaInfo>(voice_media_info),
+      std::unique_ptr<cricket::VideoMediaInfo>(video_media_info),
+      rtp_senders,
+      std::vector<rtc::scoped_refptr<RtpReceiverInterface>>());
+
+  EXPECT_FALSE(map.GetVoiceSenderInfos(*local_audio_track));
+  EXPECT_FALSE(map.GetVideoSenderInfos(*local_video_track));
+}
+
+TEST(TrackMediaInfoMapTest, SingleSenderWithMultipleSsrcs) {
+  cricket::VoiceMediaInfo* voice_media_info = new cricket::VoiceMediaInfo();
+  cricket::VideoMediaInfo* video_media_info = new cricket::VideoMediaInfo();
+  std::vector<rtc::scoped_refptr<RtpSenderInterface>> rtp_senders;
+
+  // Local audio track and sender infos using RTP sender with SSRCs 1 and 2.
+  rtc::scoped_refptr<AudioTrack> local_audio_track =
+      AudioTrack::Create("LocalAudioTrack", nullptr);
+
+  rtc::scoped_refptr<FakeRtpSender> audio_sender =
+      new FakeRtpSender(cricket::MEDIA_TYPE_AUDIO,
+                        CreateRtpParametersWithSsrcs({1, 2}));
+  audio_sender->SetTrack(local_audio_track);
+  rtp_senders.push_back(audio_sender);
+
+  voice_media_info->senders.push_back(cricket::VoiceSenderInfo());
+  voice_media_info->senders[0].local_stats.push_back(cricket::SsrcSenderInfo());
+  voice_media_info->senders[0].local_stats[0].ssrc = 1;
+  voice_media_info->senders.push_back(cricket::VoiceSenderInfo());
+  voice_media_info->senders[1].local_stats.push_back(cricket::SsrcSenderInfo());
+  voice_media_info->senders[1].local_stats[0].ssrc = 2;
+
+  // Local video track and sender infos using RTP sender with SSRCs 3 and 4.
+  rtc::scoped_refptr<VideoTrack> local_video_track =
+      VideoTrack::Create("LocalVideoTrack",
+                         FakeVideoTrackSource::Create(false));
+
+  rtc::scoped_refptr<FakeRtpSender> video_sender =
+      new FakeRtpSender(cricket::MEDIA_TYPE_VIDEO,
+                        CreateRtpParametersWithSsrcs({3, 4}));
+  video_sender->SetTrack(local_video_track);
+  rtp_senders.push_back(video_sender);
+
+  video_media_info->senders.push_back(cricket::VideoSenderInfo());

[hta-webrtc, 2017/01/05 09:46:56]

There's a ton of repeated code here.

Can you make a helper?
Something like

AddVideoSender(video_media_info, ssrc)?

It would reduce the size of this test file by a large number of lines, and
increase readability.

[hbos, 2017/01/05 15:27:56]

Done.

+  video_media_info->senders[0].local_stats.push_back(cricket::SsrcSenderInfo());
+  video_media_info->senders[0].local_stats[0].ssrc = 3;
+  video_media_info->senders.push_back(cricket::VideoSenderInfo());
+  video_media_info->senders[1].local_stats.push_back(cricket::SsrcSenderInfo());
+  video_media_info->senders[1].local_stats[0].ssrc = 4;
+
+  TrackMediaInfoMap map = CreateAndInitializeMap(
+      std::unique_ptr<cricket::VoiceMediaInfo>(voice_media_info),
+      std::unique_ptr<cricket::VideoMediaInfo>(video_media_info),
+      rtp_senders,
+      std::vector<rtc::scoped_refptr<RtpReceiverInterface>>());
+
+  // Local audio track <-> RTP audio senders
+  ASSERT_TRUE(map.GetVoiceSenderInfos(*local_audio_track));
+  EXPECT_EQ(*map.GetVoiceSenderInfos(*local_audio_track),
+            std::vector<cricket::VoiceSenderInfo*>({
+                &voice_media_info->senders[0],
+                &voice_media_info->senders[1] }));
+  EXPECT_EQ(map.GetAudioTrack(voice_media_info->senders[0]),
+            local_audio_track.get());
+  EXPECT_EQ(map.GetAudioTrack(voice_media_info->senders[1]),
+            local_audio_track.get());
+
+  // Local video track <-> RTP video senders
+  ASSERT_TRUE(map.GetVideoSenderInfos(*local_video_track));
+  EXPECT_EQ(*map.GetVideoSenderInfos(*local_video_track),
+            std::vector<cricket::VideoSenderInfo*>({
+                &video_media_info->senders[0],
+                &video_media_info->senders[1] }));
+  EXPECT_EQ(map.GetVideoTrack(video_media_info->senders[0]),
+            local_video_track.get());
+  EXPECT_EQ(map.GetVideoTrack(video_media_info->senders[1]),
+            local_video_track.get());
+}
+
+TEST(TrackMediaInfoMapTest, MultipleSendersWithOneSsrc) {
+  cricket::VoiceMediaInfo* voice_media_info = new cricket::VoiceMediaInfo();
+  cricket::VideoMediaInfo* video_media_info = new cricket::VideoMediaInfo();
+  std::vector<rtc::scoped_refptr<RtpSenderInterface>> rtp_senders;
+
+  // Local audio track and sender infos using RTP senders with SSRC 1 and 2.
+  rtc::scoped_refptr<AudioTrack> local_audio_track =
+      AudioTrack::Create("LocalAudioTrack", nullptr);
+
+  rtc::scoped_refptr<FakeRtpSender> audio_sender_ssrc1 =
+      new FakeRtpSender(cricket::MEDIA_TYPE_AUDIO,
+                        CreateRtpParametersWithSsrcs({1}));
+  audio_sender_ssrc1->SetTrack(local_audio_track);
+  rtp_senders.push_back(audio_sender_ssrc1);
+
+  rtc::scoped_refptr<FakeRtpSender> audio_sender_ssrc2 =
+      new FakeRtpSender(cricket::MEDIA_TYPE_AUDIO,
+                        CreateRtpParametersWithSsrcs({2}));
+  audio_sender_ssrc2->SetTrack(local_audio_track);
+  rtp_senders.push_back(audio_sender_ssrc2);
+
+  voice_media_info->senders.push_back(cricket::VoiceSenderInfo());
+  voice_media_info->senders[0].local_stats.push_back(cricket::SsrcSenderInfo());
+  voice_media_info->senders[0].local_stats[0].ssrc = 1;
+  voice_media_info->senders.push_back(cricket::VoiceSenderInfo());
+  voice_media_info->senders[1].local_stats.push_back(cricket::SsrcSenderInfo());
+  voice_media_info->senders[1].local_stats[0].ssrc = 2;
+
+  // Local video track and sender infos using RTP senders with SSRC 3 and 4.
+  rtc::scoped_refptr<VideoTrack> local_video_track =
+      VideoTrack::Create("LocalVideoTrack",
+                         FakeVideoTrackSource::Create(false));
+
+  rtc::scoped_refptr<FakeRtpSender> video_sender_ssrc3 =
+      new FakeRtpSender(cricket::MEDIA_TYPE_VIDEO,
+                        CreateRtpParametersWithSsrcs({3}));
+  video_sender_ssrc3->SetTrack(local_video_track);
+  rtp_senders.push_back(video_sender_ssrc3);
+
+  rtc::scoped_refptr<FakeRtpSender> video_sender_ssrc4 =
+      new FakeRtpSender(cricket::MEDIA_TYPE_VIDEO,
+                        CreateRtpParametersWithSsrcs({4}));
+  video_sender_ssrc4->SetTrack(local_video_track);
+  rtp_senders.push_back(video_sender_ssrc4);
+
+  video_media_info->senders.push_back(cricket::VideoSenderInfo());
+  video_media_info->senders[0].local_stats.push_back(cricket::SsrcSenderInfo());
+  video_media_info->senders[0].local_stats[0].ssrc = 3;
+  video_media_info->senders.push_back(cricket::VideoSenderInfo());
+  video_media_info->senders[1].local_stats.push_back(cricket::SsrcSenderInfo());
+  video_media_info->senders[1].local_stats[0].ssrc = 4;
+
+  TrackMediaInfoMap map = CreateAndInitializeMap(
+      std::unique_ptr<cricket::VoiceMediaInfo>(voice_media_info),
+      std::unique_ptr<cricket::VideoMediaInfo>(video_media_info),
+      rtp_senders,
+      std::vector<rtc::scoped_refptr<RtpReceiverInterface>>());
+
+  // Local audio track <-> RTP audio senders
+  ASSERT_TRUE(map.GetVoiceSenderInfos(*local_audio_track));
+  EXPECT_EQ(*map.GetVoiceSenderInfos(*local_audio_track),
+            std::vector<cricket::VoiceSenderInfo*>({
+                &voice_media_info->senders[0],
+                &voice_media_info->senders[1] }));
+  EXPECT_EQ(map.GetAudioTrack(voice_media_info->senders[0]),
+            local_audio_track.get());
+  EXPECT_EQ(map.GetAudioTrack(voice_media_info->senders[1]),
+            local_audio_track.get());
+
+  // Local video track <-> RTP video senders
+  ASSERT_TRUE(map.GetVideoSenderInfos(*local_video_track));
+  EXPECT_EQ(*map.GetVideoSenderInfos(*local_video_track),
+            std::vector<cricket::VideoSenderInfo*>({
+                &video_media_info->senders[0],
+                &video_media_info->senders[1] }));
+  EXPECT_EQ(map.GetVideoTrack(video_media_info->senders[0]),
+            local_video_track.get());
+  EXPECT_EQ(map.GetVideoTrack(video_media_info->senders[1]),
+            local_video_track.get());
+}
+
+// Death tests.
+// Disabled on Android because death tests misbehave on Android, see
+// base/test/gtest_util.h.
+#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
+
+TEST(TrackMediaInfoMapDeathTest, SingleReceiverWithMultipleSsrcs) {
+  cricket::VoiceMediaInfo* voice_media_info = new cricket::VoiceMediaInfo();
+  cricket::VideoMediaInfo* video_media_info = new cricket::VideoMediaInfo();
+  std::vector<rtc::scoped_refptr<RtpReceiverInterface>> rtp_receivers;
+
+  // Remote audio track and receiver infos using RTP receiver /w SSRCs 1 and 2.
+  rtc::scoped_refptr<AudioTrack> remote_audio_track =
+      AudioTrack::Create("RemoteAudioTrack", nullptr);
+
+  rtc::scoped_refptr<FakeRtpReceiver> audio_receiver =
+      new FakeRtpReceiver(cricket::MEDIA_TYPE_AUDIO,
+                          CreateRtpParametersWithSsrcs({1, 2}));
+  audio_receiver->SetTrack(remote_audio_track);
+  rtp_receivers.push_back(audio_receiver);
+
+  voice_media_info->receivers.push_back(cricket::VoiceReceiverInfo());
+  voice_media_info->receivers[0].local_stats.push_back(
+      cricket::SsrcReceiverInfo());
+  voice_media_info->receivers[0].local_stats[0].ssrc = 1;
+  voice_media_info->receivers.push_back(cricket::VoiceReceiverInfo());
+  voice_media_info->receivers[1].local_stats.push_back(
+      cricket::SsrcReceiverInfo());
+  voice_media_info->receivers[1].local_stats[0].ssrc = 2;
+
+  // Remote video track and receiver infos using RTP receiver /w SSRCs 3 and 4.
+  rtc::scoped_refptr<VideoTrack> remote_video_track =
+      VideoTrack::Create("RemoteVideoTrack",
+                         FakeVideoTrackSource::Create(false));
+
+  rtc::scoped_refptr<FakeRtpReceiver> video_receiver =
+      new FakeRtpReceiver(cricket::MEDIA_TYPE_VIDEO,
+                          CreateRtpParametersWithSsrcs({3, 4}));
+  video_receiver->SetTrack(remote_video_track);
+  rtp_receivers.push_back(video_receiver);
+
+  video_media_info->receivers.push_back(cricket::VideoReceiverInfo());
+  video_media_info->receivers[0].local_stats.push_back(
+      cricket::SsrcReceiverInfo());
+  video_media_info->receivers[0].local_stats[0].ssrc = 3;
+  video_media_info->receivers.push_back(cricket::VideoReceiverInfo());
+  video_media_info->receivers[1].local_stats.push_back(
+      cricket::SsrcReceiverInfo());
+  video_media_info->receivers[1].local_stats[0].ssrc = 4;
+
+  EXPECT_DEATH(CreateAndInitializeMap(
+      std::unique_ptr<cricket::VoiceMediaInfo>(voice_media_info),
+      std::unique_ptr<cricket::VideoMediaInfo>(video_media_info),
+      std::vector<rtc::scoped_refptr<RtpSenderInterface>>(),
+      rtp_receivers), "");
+}
+
+TEST(TrackMediaInfoMapDeathTest, MultipleReceiversWithOneSsrc) {
+  cricket::VoiceMediaInfo* voice_media_info = new cricket::VoiceMediaInfo();
+  cricket::VideoMediaInfo* video_media_info = new cricket::VideoMediaInfo();
+  std::vector<rtc::scoped_refptr<RtpReceiverInterface>> rtp_receivers;
+
+  // Remote audio track and receiver infos using RTP receivers /w SSRC 1 and 2.
+  rtc::scoped_refptr<AudioTrack> remote_audio_track =
+      AudioTrack::Create("RemoteAudioTrack", nullptr);
+
+  rtc::scoped_refptr<FakeRtpReceiver> audio_receiver_ssrc1 =
+      new FakeRtpReceiver(cricket::MEDIA_TYPE_AUDIO,
+                          CreateRtpParametersWithSsrcs({1}));
+  audio_receiver_ssrc1->SetTrack(remote_audio_track);
+  rtp_receivers.push_back(audio_receiver_ssrc1);
+
+  rtc::scoped_refptr<FakeRtpReceiver> audio_receiver_ssrc2 =
+      new FakeRtpReceiver(cricket::MEDIA_TYPE_AUDIO,
+                          CreateRtpParametersWithSsrcs({2}));
+  audio_receiver_ssrc2->SetTrack(remote_audio_track);
+  rtp_receivers.push_back(audio_receiver_ssrc2);
+
+  voice_media_info->receivers.push_back(cricket::VoiceReceiverInfo());
+  voice_media_info->receivers[0].local_stats.push_back(
+      cricket::SsrcReceiverInfo());
+  voice_media_info->receivers[0].local_stats[0].ssrc = 1;
+  voice_media_info->receivers.push_back(cricket::VoiceReceiverInfo());
+  voice_media_info->receivers[1].local_stats.push_back(
+      cricket::SsrcReceiverInfo());
+  voice_media_info->receivers[1].local_stats[0].ssrc = 2;
+
+  // Remote video track and receiver infos using RTP receivers /w SSRC 3 and 4.
+  rtc::scoped_refptr<VideoTrack> remote_video_track =
+      VideoTrack::Create("RemoteVideoTrack",
+                         FakeVideoTrackSource::Create(false));
+
+  rtc::scoped_refptr<FakeRtpReceiver> video_receiver_ssrc3 =
+      new FakeRtpReceiver(cricket::MEDIA_TYPE_VIDEO,
+                          CreateRtpParametersWithSsrcs({3}));
+  video_receiver_ssrc3->SetTrack(remote_video_track);
+  rtp_receivers.push_back(video_receiver_ssrc3);
+
+  rtc::scoped_refptr<FakeRtpReceiver> video_receiver_ssrc4 =
+      new FakeRtpReceiver(cricket::MEDIA_TYPE_VIDEO,
+                          CreateRtpParametersWithSsrcs({4}));
+  video_receiver_ssrc4->SetTrack(remote_video_track);
+  rtp_receivers.push_back(video_receiver_ssrc4);
+
+  video_media_info->receivers.push_back(cricket::VideoReceiverInfo());
+  video_media_info->receivers[0].local_stats.push_back(
+      cricket::SsrcReceiverInfo());
+  video_media_info->receivers[0].local_stats[0].ssrc = 3;
+  video_media_info->receivers.push_back(cricket::VideoReceiverInfo());
+  video_media_info->receivers[1].local_stats.push_back(
+      cricket::SsrcReceiverInfo());
+  video_media_info->receivers[1].local_stats[0].ssrc = 4;
+
+  EXPECT_DEATH(CreateAndInitializeMap(
+      std::unique_ptr<cricket::VoiceMediaInfo>(voice_media_info),
+      std::unique_ptr<cricket::VideoMediaInfo>(video_media_info),
+      std::vector<rtc::scoped_refptr<RtpSenderInterface>>(),
+      rtp_receivers), "");
+}
+
+TEST(TrackMediaInfoMapDeathTest, SingleSenderAndReceiverWithSsrcNotUnique) {
+  cricket::VoiceMediaInfo* voice_media_info = new cricket::VoiceMediaInfo();
+  cricket::VideoMediaInfo* video_media_info = new cricket::VideoMediaInfo();
+  std::vector<rtc::scoped_refptr<RtpSenderInterface>> rtp_senders;
+  std::vector<rtc::scoped_refptr<RtpReceiverInterface>> rtp_receivers;
+
+  // Local audio track and sender info using an RTP sender with SSRC 1.
+  rtc::scoped_refptr<AudioTrack> local_audio_track =
+      AudioTrack::Create("LocalAudioTrack", nullptr);
+
+  rtc::scoped_refptr<FakeRtpSender> audio_sender =
+      new FakeRtpSender(cricket::MEDIA_TYPE_AUDIO,
+                        CreateRtpParametersWithSsrcs({1}));
+  audio_sender->SetTrack(local_audio_track);
+  rtp_senders.push_back(audio_sender);
+
+  voice_media_info->senders.push_back(cricket::VoiceSenderInfo());
+  voice_media_info->senders[0].local_stats.push_back(cricket::SsrcSenderInfo());
+  voice_media_info->senders[0].local_stats[0].ssrc = 1;
+
+  // Remote audio track and receiver info using an RTP sender with SSRC 1.
+  rtc::scoped_refptr<AudioTrack> remote_audio_track =
+      AudioTrack::Create("RemoteAudioTrack", nullptr);
+
+  rtc::scoped_refptr<FakeRtpReceiver> audio_receiver =
+      new FakeRtpReceiver(cricket::MEDIA_TYPE_AUDIO,
+                          CreateRtpParametersWithSsrcs({1}));
+  audio_receiver->SetTrack(remote_audio_track);
+  rtp_receivers.push_back(audio_receiver);
+
+  voice_media_info->receivers.push_back(cricket::VoiceReceiverInfo());
+  voice_media_info->receivers[0].local_stats.push_back(
+      cricket::SsrcReceiverInfo());
+  voice_media_info->receivers[0].local_stats[0].ssrc = 1;
+
+  // Local video track and sender info using an RTP sender with SSRC 1.
+  rtc::scoped_refptr<VideoTrack> local_video_track =
+      VideoTrack::Create("LocalVideoTrack",
+                         FakeVideoTrackSource::Create(false));
+
+  rtc::scoped_refptr<FakeRtpSender> video_sender =
+      new FakeRtpSender(cricket::MEDIA_TYPE_VIDEO,
+                        CreateRtpParametersWithSsrcs({1}));
+  video_sender->SetTrack(local_video_track);
+  rtp_senders.push_back(video_sender);
+
+  video_media_info->senders.push_back(cricket::VideoSenderInfo());
+  video_media_info->senders[0].local_stats.push_back(cricket::SsrcSenderInfo());
+  video_media_info->senders[0].local_stats[0].ssrc = 1;
+
+  // Remote video track and receiver info using an RTP sender with SSRC 1.
+  rtc::scoped_refptr<VideoTrack> remote_video_track =
+      VideoTrack::Create("RemoteVideoTrack",
+                         FakeVideoTrackSource::Create(false));
+
+  rtc::scoped_refptr<FakeRtpReceiver> video_receiver =
+      new FakeRtpReceiver(cricket::MEDIA_TYPE_VIDEO,
+                          CreateRtpParametersWithSsrcs({1}));
+  video_receiver->SetTrack(remote_video_track);
+  rtp_receivers.push_back(video_receiver);
+
+  video_media_info->receivers.push_back(cricket::VideoReceiverInfo());
+  video_media_info->receivers[0].local_stats.push_back(
+      cricket::SsrcReceiverInfo());
+  video_media_info->receivers[0].local_stats[0].ssrc = 1;
+
+  EXPECT_DEATH(CreateAndInitializeMap(
+      std::unique_ptr<cricket::VoiceMediaInfo>(voice_media_info),
+      std::unique_ptr<cricket::VideoMediaInfo>(video_media_info),
+      std::vector<rtc::scoped_refptr<RtpSenderInterface>>(),
+      rtp_receivers), "");
+}
+
+#endif  // RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
+
+}  // namespace webrtc