text: /*
   *  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 <stdint.h>
  #include <string.h>
  
  #include <algorithm>
  #include <memory>
  #include <set>
  #include <string>
  #include <vector>
  
  #include "absl/algorithm/container.h"
  #include "absl/strings/match.h"
  #include "api/audio_codecs/audio_decoder_factory.h"
  #include "api/audio_codecs/audio_encoder_factory.h"
  #include "api/audio_codecs/builtin_audio_decoder_factory.h"
  #include "api/audio_codecs/builtin_audio_encoder_factory.h"
  #include "api/audio_options.h"
  #include "api/data_channel_interface.h"
  #include "api/peer_connection_interface.h"
  #include "api/rtp_receiver_interface.h"
  #include "api/rtp_sender_interface.h"
  #include "api/scoped_refptr.h"
  #include "api/stats/rtc_stats.h"
  #include "api/stats/rtc_stats_report.h"
  #include "api/stats/rtcstats_objects.h"
  #include "pc/rtc_stats_traversal.h"
  #include "pc/test/peer_connection_test_wrapper.h"
  #include "pc/test/rtc_stats_obtainer.h"
  #include "rtc_base/checks.h"
  #include "rtc_base/event_tracer.h"
  #include "rtc_base/gunit.h"
  #include "rtc_base/ref_counted_object.h"
  #include "rtc_base/thread.h"
  #include "rtc_base/trace_event.h"
  #include "rtc_base/virtual_socket_server.h"
  #include "test/gmock.h"
  #include "test/gtest.h"
  
  using ::testing::Contains;
  
  namespace webrtc {
  
  namespace {
  
  const int64_t kGetStatsTimeoutMs = 10000;
  
  const unsigned char* GetCategoryEnabledHandler(const char* name) {
    if (strcmp("webrtc_stats", name) != 0) {
      return reinterpret_cast<const unsigned char*>("");
    }
    return reinterpret_cast<const unsigned char*>(name);
  }
  
  class RTCStatsReportTraceListener {
   public:
    static void SetUp() {
      if (!traced_report_)
        traced_report_ = new RTCStatsReportTraceListener();
      traced_report_->last_trace_ = "";
      SetupEventTracer(&GetCategoryEnabledHandler,
                       &RTCStatsReportTraceListener::AddTraceEventHandler);
    }
  
    static const std::string& last_trace() {
      RTC_DCHECK(traced_report_);
      return traced_report_->last_trace_;
    }
  
   private:
    static void AddTraceEventHandler(
        char phase,
        const unsigned char* category_enabled,
        const char* name,
        unsigned long long id,  // NOLINT(runtime/int)
        int num_args,
        const char** arg_names,
        const unsigned char* arg_types,
        const unsigned long long* arg_values,  // NOLINT(runtime/int)
        unsigned char flags) {
      RTC_DCHECK(traced_report_);
      EXPECT_STREQ("webrtc_stats",
                   reinterpret_cast<const char*>(category_enabled));
      EXPECT_STREQ("webrtc_stats", name);
      EXPECT_EQ(1, num_args);
      EXPECT_STREQ("report", arg_names[0]);
      EXPECT_EQ(TRACE_VALUE_TYPE_COPY_STRING, arg_types[0]);
  
      traced_report_->last_trace_ = reinterpret_cast<const char*>(arg_values[0]);
    }
  
    static RTCStatsReportTraceListener* traced_report_;
    std::string last_trace_;
  };
  
  RTCStatsReportTraceListener* RTCStatsReportTraceListener::traced_report_ =
      nullptr;
  
  class RTCStatsIntegrationTest : public ::testing::Test {
   public:
    RTCStatsIntegrationTest()
        : network_thread_(new rtc::Thread(&virtual_socket_server_)),
          worker_thread_(rtc::Thread::Create()) {
      RTCStatsReportTraceListener::SetUp();
  
      RTC_CHECK(network_thread_->Start());
      RTC_CHECK(worker_thread_->Start());
  
      caller_ = rtc::make_ref_counted<PeerConnectionTestWrapper>(
          "caller", network_thread_.get(), worker_thread_.get());
      callee_ = rtc::make_ref_counted<PeerConnectionTestWrapper>(
          "callee", network_thread_.get(), worker_thread_.get());
    }
  
    void StartCall() {
      // Create PeerConnections and "connect" sigslots
      PeerConnectionInterface::RTCConfiguration config;
      PeerConnectionInterface::IceServer ice_server;
      ice_server.uri = "stun:1.1.1.1:3478";
      config.servers.push_back(ice_server);
      EXPECT_TRUE(caller_->CreatePc(config, CreateBuiltinAudioEncoderFactory(),
                                    CreateBuiltinAudioDecoderFactory()));
      EXPECT_TRUE(callee_->CreatePc(config, CreateBuiltinAudioEncoderFactory(),
                                    CreateBuiltinAudioDecoderFactory()));
      PeerConnectionTestWrapper::Connect(caller_.get(), callee_.get());
  
      // Get user media for audio and video
      caller_->GetAndAddUserMedia(true, cricket::AudioOptions(), true);
      callee_->GetAndAddUserMedia(true, cricket::AudioOptions(), true);
  
      // Create data channels
      DataChannelInit init;
      caller_->CreateDataChannel("data", init);
      callee_->CreateDataChannel("data", init);
  
      // Negotiate and wait for call to establish
      caller_->CreateOffer(PeerConnectionInterface::RTCOfferAnswerOptions());
      caller_->WaitForCallEstablished();
      callee_->WaitForCallEstablished();
    }
  
    rtc::scoped_refptr<const RTCStatsReport> GetStatsFromCaller() {
      return GetStats(caller_->pc());
    }
    rtc::scoped_refptr<const RTCStatsReport> GetStatsFromCaller(
        rtc::scoped_refptr<RtpSenderInterface> selector) {
      return GetStats(caller_->pc(), selector);
    }
    rtc::scoped_refptr<const RTCStatsReport> GetStatsFromCaller(
        rtc::scoped_refptr<RtpReceiverInterface> selector) {
      return GetStats(caller_->pc(), selector);
    }
  
    rtc::scoped_refptr<const RTCStatsReport> GetStatsFromCallee() {
      return GetStats(callee_->pc());
    }
    rtc::scoped_refptr<const RTCStatsReport> GetStatsFromCallee(
        rtc::scoped_refptr<RtpSenderInterface> selector) {
      return GetStats(callee_->pc(), selector);
    }
    rtc::scoped_refptr<const RTCStatsReport> GetStatsFromCallee(
        rtc::scoped_refptr<RtpReceiverInterface> selector) {
      return GetStats(callee_->pc(), selector);
    }
  
   protected:
    static rtc::scoped_refptr<const RTCStatsReport> GetStats(
        PeerConnectionInterface* pc) {
      rtc::scoped_refptr<RTCStatsObtainer> stats_obtainer =
          RTCStatsObtainer::Create();
      pc->GetStats(stats_obtainer);
      EXPECT_TRUE_WAIT(stats_obtainer->report(), kGetStatsTimeoutMs);
      return stats_obtainer->report();
    }
  
    template <typename T>
    static rtc::scoped_refptr<const RTCStatsReport> GetStats(
        PeerConnectionInterface* pc,
        rtc::scoped_refptr<T> selector) {
      rtc::scoped_refptr<RTCStatsObtainer> stats_obtainer =
          RTCStatsObtainer::Create();
      pc->GetStats(selector, stats_obtainer);
      EXPECT_TRUE_WAIT(stats_obtainer->report(), kGetStatsTimeoutMs);
      return stats_obtainer->report();
    }
  
    // |network_thread_| uses |virtual_socket_server_| so they must be
    // constructed/destructed in the correct order.
    rtc::VirtualSocketServer virtual_socket_server_;
    std::unique_ptr<rtc::Thread> network_thread_;
    std::unique_ptr<rtc::Thread> worker_thread_;
    rtc::scoped_refptr<PeerConnectionTestWrapper> caller_;
    rtc::scoped_refptr<PeerConnectionTestWrapper> callee_;
  };
  
  class RTCStatsVerifier {
   public:
    RTCStatsVerifier(const RTCStatsReport* report, const RTCStats* stats)
        : report_(report), stats_(stats), all_tests_successful_(true) {
      RTC_CHECK(report_);
      RTC_CHECK(stats_);
      for (const RTCStatsMemberInterface* member : stats_->Members()) {
        untested_members_.insert(member);
      }
    }
  
    void MarkMemberTested(const RTCStatsMemberInterface& member,
                          bool test_successful) {
      untested_members_.erase(&member);
      all_tests_successful_ &= test_successful;
    }
  
    void TestMemberIsDefined(const RTCStatsMemberInterface& member) {
      EXPECT_TRUE(member.is_defined())
          << stats_->type() << "." << member.name() << "[" << stats_->id()
          << "] was undefined.";
      MarkMemberTested(member, member.is_defined());
    }
  
    void TestMemberIsUndefined(const RTCStatsMemberInterface& member) {
      EXPECT_FALSE(member.is_defined())
          << stats_->type() << "." << member.name() << "[" << stats_->id()
          << "] was defined (" << member.ValueToString() << ").";
      MarkMemberTested(member, !member.is_defined());
    }
  
    template <typename T>
    void TestMemberIsPositive(const RTCStatsMemberInterface& member) {
      EXPECT_TRUE(member.is_defined())
          << stats_->type() << "." << member.name() << "[" << stats_->id()
          << "] was undefined.";
      if (!member.is_defined()) {
        MarkMemberTested(member, false);
        return;
      }
      bool is_positive = *member.cast_to<RTCStatsMember<T>>() > T(0);
      EXPECT_TRUE(is_positive)
          << stats_->type() << "." << member.name() << "[" << stats_->id()
          << "] was not positive (" << member.ValueToString() << ").";
      MarkMemberTested(member, is_positive);
    }
  
    template <typename T>
    void TestMemberIsNonNegative(const RTCStatsMemberInterface& member) {
      EXPECT_TRUE(member.is_defined())
          << stats_->type() << "." << member.name() << "[" << stats_->id()
          << "] was undefined.";
      if (!member.is_defined()) {
        MarkMemberTested(member, false);
        return;
      }
      bool is_non_negative = *member.cast_to<RTCStatsMember<T>>() >= T(0);
      EXPECT_TRUE(is_non_negative)
          << stats_->type() << "." << member.name() << "[" << stats_->id()
          << "] was not non-negative (" << member.ValueToString() << ").";
      MarkMemberTested(member, is_non_negative);
    }
  
    void TestMemberIsIDReference(const RTCStatsMemberInterface& member,
                                 const char* expected_type) {
      TestMemberIsIDReference(member, expected_type, false);
    }
  
    void TestMemberIsOptionalIDReference(const RTCStatsMemberInterface& member,
                                         const char* expected_type) {
      TestMemberIsIDReference(member, expected_type, true);
    }
  
    bool ExpectAllMembersSuccessfullyTested() {
      if (untested_members_.empty())
        return all_tests_successful_;
      for (const RTCStatsMemberInterface* member : untested_members_) {
        EXPECT_TRUE(false) << stats_->type() << "." << member->name() << "["
                           << stats_->id() << "] was not tested.";
      }
      return false;
    }
  
   private:
    void TestMemberIsIDReference(const RTCStatsMemberInterface& member,
                                 const char* expected_type,
                                 bool optional) {
      if (optional && !member.is_defined()) {
        MarkMemberTested(member, true);
        return;
      }
      bool valid_reference = false;
      if (member.is_defined()) {
        if (member.type() == RTCStatsMemberInterface::kString) {
          // A single ID.
          const RTCStatsMember<std::string>& id =
              member.cast_to<RTCStatsMember<std::string>>();
          const RTCStats* referenced_stats = report_->Get(*id);
          valid_reference =
              referenced_stats && referenced_stats->type() == expected_type;
        } else if (member.type() == RTCStatsMemberInterface::kSequenceString) {
          // A vector of IDs.
          valid_reference = true;
          const RTCStatsMember<std::vector<std::string>>& ids =
              member.cast_to<RTCStatsMember<std::vector<std::string>>>();
          for (const std::string& id : *ids) {
            const RTCStats* referenced_stats = report_->Get(id);
            if (!referenced_stats || referenced_stats->type() != expected_type) {
              valid_reference = false;
              break;
            }
          }
        }
      }
      EXPECT_TRUE(valid_reference)
          << stats_->type() << "." << member.name()
          << " is not a reference to an "
             "existing dictionary of type "
          << expected_type << " (value: "
          << (member.is_defined() ? member.ValueToString() : "null") << ").";
      MarkMemberTested(member, valid_reference);
    }
  
    rtc::scoped_refptr<const RTCStatsReport> report_;
    const RTCStats* stats_;
    std::set<const RTCStatsMemberInterface*> untested_members_;
    bool all_tests_successful_;
  };
  
  class RTCStatsReportVerifier {
   public:
    static std::set<const char*> StatsTypes() {
      std::set<const char*> stats_types;
      stats_types.insert(RTCCertificateStats::kType);
      stats_types.insert(RTCCodecStats::kType);
      stats_types.insert(RTCDataChannelStats::kType);
      stats_types.insert(RTCIceCandidatePairStats::kType);
      stats_types.insert(RTCLocalIceCandidateStats::kType);
      stats_types.insert(RTCRemoteIceCandidateStats::kType);
      stats_types.insert(RTCMediaStreamStats::kType);
      stats_types.insert(RTCMediaStreamTrackStats::kType);
      stats_types.insert(RTCPeerConnectionStats::kType);
      stats_types.insert(RTCInboundRTPStreamStats::kType);
      stats_types.insert(RTCOutboundRTPStreamStats::kType);
      stats_types.insert(RTCTransportStats::kType);
      return stats_types;
    }
  
    explicit RTCStatsReportVerifier(const RTCStatsReport* report)
        : report_(report) {}
  
    void VerifyReport(std::vector<const char*> allowed_missing_stats) {
      std::set<const char*> missing_stats = StatsTypes();
      bool verify_successful = true;
      std::vector<const RTCTransportStats*> transport_stats =
          report_->GetStatsOfType<RTCTransportStats>();
      EXPECT_EQ(transport_stats.size(), 1U);
      std::string selected_candidate_pair_id =
          *transport_stats[0]->selected_candidate_pair_id;
      for (const RTCStats& stats : *report_) {
        missing_stats.erase(stats.type());
        if (stats.type() == RTCCertificateStats::kType) {
          verify_successful &=
              VerifyRTCCertificateStats(stats.cast_to<RTCCertificateStats>());
        } else if (stats.type() == RTCCodecStats::kType) {
          verify_successful &=
              VerifyRTCCodecStats(stats.cast_to<RTCCodecStats>());
        } else if (stats.type() == RTCDataChannelStats::kType) {
          verify_successful &=
              VerifyRTCDataChannelStats(stats.cast_to<RTCDataChannelStats>());
        } else if (stats.type() == RTCIceCandidatePairStats::kType) {
          verify_successful &= VerifyRTCIceCandidatePairStats(
              stats.cast_to<RTCIceCandidatePairStats>(),
              stats.id() == selected_candidate_pair_id);
        } else if (stats.type() == RTCLocalIceCandidateStats::kType) {
          verify_successful &= VerifyRTCLocalIceCandidateStats(
              stats.cast_to<RTCLocalIceCandidateStats>());
        } else if (stats.type() == RTCRemoteIceCandidateStats::kType) {
          verify_successful &= VerifyRTCRemoteIceCandidateStats(
              stats.cast_to<RTCRemoteIceCandidateStats>());
        } else if (stats.type() == RTCMediaStreamStats::kType) {
          verify_successful &=
              VerifyRTCMediaStreamStats(stats.cast_to<RTCMediaStreamStats>());
        } else if (stats.type() == RTCMediaStreamTrackStats::kType) {
          verify_successful &= VerifyRTCMediaStreamTrackStats(
              stats.cast_to<RTCMediaStreamTrackStats>());
        } else if (stats.type() == RTCPeerConnectionStats::kType) {
          verify_successful &= VerifyRTCPeerConnectionStats(
              stats.cast_to<RTCPeerConnectionStats>());
        } else if (stats.type() == RTCInboundRTPStreamStats::kType) {
          verify_successful &= VerifyRTCInboundRTPStreamStats(
              stats.cast_to<RTCInboundRTPStreamStats>());
        } else if (stats.type() == RTCOutboundRTPStreamStats::kType) {
          verify_successful &= VerifyRTCOutboundRTPStreamStats(
              stats.cast_to<RTCOutboundRTPStreamStats>());
        } else if (stats.type() == RTCRemoteInboundRtpStreamStats::kType) {
          verify_successful &= VerifyRTCRemoteInboundRtpStreamStats(
              stats.cast_to<RTCRemoteInboundRtpStreamStats>());
        } else if (stats.type() == RTCRemoteOutboundRtpStreamStats::kType) {
          verify_successful &= VerifyRTCRemoteOutboundRTPStreamStats(
              stats.cast_to<RTCRemoteOutboundRtpStreamStats>());
        } else if (stats.type() == RTCAudioSourceStats::kType) {
          // RTCAudioSourceStats::kType and RTCVideoSourceStats::kType both have
          // the value "media-source", but they are distinguishable with pointer
          // equality (==). In JavaScript they would be distinguished with |kind|.
          verify_successful &=
              VerifyRTCAudioSourceStats(stats.cast_to<RTCAudioSourceStats>());
        } else if (stats.type() == RTCVideoSourceStats::kType) {
          // RTCAudioSourceStats::kType and RTCVideoSourceStats::kType both have
          // the value "media-source", but they are distinguishable with pointer
          // equality (==). In JavaScript they would be distinguished with |kind|.
          verify_successful &=
              VerifyRTCVideoSourceStats(stats.cast_to<RTCVideoSourceStats>());
        } else if (stats.type() == RTCTransportStats::kType) {
          verify_successful &=
              VerifyRTCTransportStats(stats.cast_to<RTCTransportStats>());
        } else {
          EXPECT_TRUE(false) << "Unrecognized stats type: " << stats.type();
          verify_successful = false;
        }
      }
      for (const char* missing : missing_stats) {
        if (!absl::c_linear_search(allowed_missing_stats, missing)) {
          verify_successful = false;
          EXPECT_TRUE(false) << "Missing expected stats type: " << missing;
        }
      }
      EXPECT_TRUE(verify_successful)
          << "One or more problems with the stats. This is the report:\n"
          << report_->ToJson();
    }
  
    bool VerifyRTCCertificateStats(const RTCCertificateStats& certificate) {
      RTCStatsVerifier verifier(report_, &certificate);
      verifier.TestMemberIsDefined(certificate.fingerprint);
      verifier.TestMemberIsDefined(certificate.fingerprint_algorithm);
      verifier.TestMemberIsDefined(certificate.base64_certificate);
      verifier.TestMemberIsOptionalIDReference(certificate.issuer_certificate_id,
                                               RTCCertificateStats::kType);
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
    bool VerifyRTCCodecStats(const RTCCodecStats& codec) {
      RTCStatsVerifier verifier(report_, &codec);
      verifier.TestMemberIsIDReference(codec.transport_id,
                                       RTCTransportStats::kType);
      verifier.TestMemberIsDefined(codec.payload_type);
      verifier.TestMemberIsDefined(codec.mime_type);
      verifier.TestMemberIsPositive<uint32_t>(codec.clock_rate);
  
      if (codec.mime_type->rfind("audio", 0) == 0)
        verifier.TestMemberIsPositive<uint32_t>(codec.channels);
      else
        verifier.TestMemberIsUndefined(codec.channels);
  
      // sdp_fmtp_line is an optional field.
      verifier.MarkMemberTested(codec.sdp_fmtp_line, true);
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
    bool VerifyRTCDataChannelStats(const RTCDataChannelStats& data_channel) {
      RTCStatsVerifier verifier(report_, &data_channel);
      verifier.TestMemberIsDefined(data_channel.label);
      verifier.TestMemberIsDefined(data_channel.protocol);
      verifier.TestMemberIsDefined(data_channel.data_channel_identifier);
      verifier.TestMemberIsDefined(data_channel.state);
      verifier.TestMemberIsNonNegative<uint32_t>(data_channel.messages_sent);
      verifier.TestMemberIsNonNegative<uint64_t>(data_channel.bytes_sent);
      verifier.TestMemberIsNonNegative<uint32_t>(data_channel.messages_received);
      verifier.TestMemberIsNonNegative<uint64_t>(data_channel.bytes_received);
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
    bool VerifyRTCIceCandidatePairStats(
        const RTCIceCandidatePairStats& candidate_pair,
        bool is_selected_pair) {
      RTCStatsVerifier verifier(report_, &candidate_pair);
      verifier.TestMemberIsIDReference(candidate_pair.transport_id,
                                       RTCTransportStats::kType);
      verifier.TestMemberIsIDReference(candidate_pair.local_candidate_id,
                                       RTCLocalIceCandidateStats::kType);
      verifier.TestMemberIsIDReference(candidate_pair.remote_candidate_id,
                                       RTCRemoteIceCandidateStats::kType);
      verifier.TestMemberIsDefined(candidate_pair.state);
      verifier.TestMemberIsNonNegative<uint64_t>(candidate_pair.priority);
      verifier.TestMemberIsDefined(candidate_pair.nominated);
      verifier.TestMemberIsDefined(candidate_pair.writable);
      verifier.TestMemberIsUndefined(candidate_pair.readable);
      verifier.TestMemberIsNonNegative<uint64_t>(candidate_pair.bytes_sent);
      verifier.TestMemberIsNonNegative<uint64_t>(candidate_pair.bytes_received);
      verifier.TestMemberIsNonNegative<double>(
          candidate_pair.total_round_trip_time);
      verifier.TestMemberIsNonNegative<double>(
          candidate_pair.current_round_trip_time);
      if (is_selected_pair) {
        verifier.TestMemberIsNonNegative<double>(
            candidate_pair.available_outgoing_bitrate);
        // A pair should be nominated in order to be selected.
        EXPECT_TRUE(*candidate_pair.nominated);
      } else {
        verifier.TestMemberIsUndefined(candidate_pair.available_outgoing_bitrate);
      }
      verifier.TestMemberIsUndefined(candidate_pair.available_incoming_bitrate);
      verifier.TestMemberIsNonNegative<uint64_t>(
          candidate_pair.requests_received);
      verifier.TestMemberIsNonNegative<uint64_t>(candidate_pair.requests_sent);
      verifier.TestMemberIsNonNegative<uint64_t>(
          candidate_pair.responses_received);
      verifier.TestMemberIsNonNegative<uint64_t>(candidate_pair.responses_sent);
      verifier.TestMemberIsUndefined(candidate_pair.retransmissions_received);
      verifier.TestMemberIsUndefined(candidate_pair.retransmissions_sent);
      verifier.TestMemberIsUndefined(candidate_pair.consent_requests_received);
      verifier.TestMemberIsNonNegative<uint64_t>(
          candidate_pair.consent_requests_sent);
      verifier.TestMemberIsUndefined(candidate_pair.consent_responses_received);
      verifier.TestMemberIsUndefined(candidate_pair.consent_responses_sent);
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
    bool VerifyRTCIceCandidateStats(const RTCIceCandidateStats& candidate) {
      RTCStatsVerifier verifier(report_, &candidate);
      verifier.TestMemberIsIDReference(candidate.transport_id,
                                       RTCTransportStats::kType);
      verifier.TestMemberIsDefined(candidate.is_remote);
      if (*candidate.is_remote) {
        verifier.TestMemberIsUndefined(candidate.network_type);
      } else {
        verifier.TestMemberIsDefined(candidate.network_type);
      }
      verifier.TestMemberIsDefined(candidate.ip);
      verifier.TestMemberIsDefined(candidate.address);
      verifier.TestMemberIsNonNegative<int32_t>(candidate.port);
      verifier.TestMemberIsDefined(candidate.protocol);
      verifier.TestMemberIsDefined(candidate.candidate_type);
      verifier.TestMemberIsNonNegative<int32_t>(candidate.priority);
      verifier.TestMemberIsUndefined(candidate.url);
      verifier.TestMemberIsUndefined(candidate.relay_protocol);
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
    bool VerifyRTCLocalIceCandidateStats(
        const RTCLocalIceCandidateStats& local_candidate) {
      return VerifyRTCIceCandidateStats(local_candidate);
    }
  
    bool VerifyRTCRemoteIceCandidateStats(
        const RTCRemoteIceCandidateStats& remote_candidate) {
      return VerifyRTCIceCandidateStats(remote_candidate);
    }
  
    bool VerifyRTCMediaStreamStats(const RTCMediaStreamStats& media_stream) {
      RTCStatsVerifier verifier(report_, &media_stream);
      verifier.TestMemberIsDefined(media_stream.stream_identifier);
      verifier.TestMemberIsIDReference(media_stream.track_ids,
                                       RTCMediaStreamTrackStats::kType);
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
    bool VerifyRTCMediaStreamTrackStats(
        const RTCMediaStreamTrackStats& media_stream_track) {
      RTCStatsVerifier verifier(report_, &media_stream_track);
      verifier.TestMemberIsDefined(media_stream_track.track_identifier);
      verifier.TestMemberIsDefined(media_stream_track.remote_source);
      verifier.TestMemberIsDefined(media_stream_track.ended);
      verifier.TestMemberIsDefined(media_stream_track.detached);
      verifier.TestMemberIsDefined(media_stream_track.kind);
      RTC_DCHECK(media_stream_track.remote_source.is_defined());
      // Video or audio media stream track?
      if (*media_stream_track.kind == RTCMediaStreamTrackKind::kVideo) {
        // The type of the referenced media source depends on kind.
        if (*media_stream_track.remote_source) {
          verifier.TestMemberIsUndefined(media_stream_track.media_source_id);
          verifier.TestMemberIsNonNegative<double>(
              media_stream_track.jitter_buffer_delay);
          verifier.TestMemberIsNonNegative<uint64_t>(
              media_stream_track.jitter_buffer_emitted_count);
          verifier.TestMemberIsUndefined(media_stream_track.frames_sent);
          verifier.TestMemberIsUndefined(media_stream_track.huge_frames_sent);
          verifier.TestMemberIsNonNegative<uint32_t>(
              media_stream_track.frames_received);
          verifier.TestMemberIsNonNegative<uint32_t>(
              media_stream_track.frames_decoded);
          verifier.TestMemberIsNonNegative<uint32_t>(
              media_stream_track.frames_dropped);
          verifier.TestMemberIsNonNegative<uint32_t>(
              media_stream_track.freeze_count);
          verifier.TestMemberIsNonNegative<uint32_t>(
              media_stream_track.pause_count);
          verifier.TestMemberIsNonNegative<double>(
              media_stream_track.total_freezes_duration);
          verifier.TestMemberIsNonNegative<double>(
              media_stream_track.total_pauses_duration);
          verifier.TestMemberIsNonNegative<double>(
              media_stream_track.total_frames_duration);
          verifier.TestMemberIsNonNegative<double>(
              media_stream_track.sum_squared_frame_durations);
        } else {
          verifier.TestMemberIsIDReference(media_stream_track.media_source_id,
                                           RTCVideoSourceStats::kType);
          // Local tracks have no jitter buffer.
          verifier.TestMemberIsUndefined(media_stream_track.jitter_buffer_delay);
          verifier.TestMemberIsUndefined(
              media_stream_track.jitter_buffer_emitted_count);
          verifier.TestMemberIsNonNegative<uint32_t>(
              media_stream_track.frames_sent);
          verifier.TestMemberIsNonNegative<uint32_t>(
              media_stream_track.huge_frames_sent);
          verifier.TestMemberIsUndefined(media_stream_track.frames_received);
          verifier.TestMemberIsUndefined(media_stream_track.frames_decoded);
          verifier.TestMemberIsUndefined(media_stream_track.frames_dropped);
          verifier.TestMemberIsUndefined(media_stream_track.freeze_count);
          verifier.TestMemberIsUndefined(media_stream_track.pause_count);
          verifier.TestMemberIsUndefined(
              media_stream_track.total_freezes_duration);
          verifier.TestMemberIsUndefined(
              media_stream_track.total_pauses_duration);
          verifier.TestMemberIsUndefined(
              media_stream_track.total_frames_duration);
          verifier.TestMemberIsUndefined(
              media_stream_track.sum_squared_frame_durations);
        }
        // Video-only members
        verifier.TestMemberIsNonNegative<uint32_t>(
            media_stream_track.frame_width);
        verifier.TestMemberIsNonNegative<uint32_t>(
            media_stream_track.frame_height);
        verifier.TestMemberIsUndefined(media_stream_track.frames_per_second);
        verifier.TestMemberIsUndefined(media_stream_track.frames_corrupted);
        verifier.TestMemberIsUndefined(media_stream_track.partial_frames_lost);
        verifier.TestMemberIsUndefined(media_stream_track.full_frames_lost);
        // Audio-only members should be undefined
        verifier.TestMemberIsUndefined(media_stream_track.audio_level);
        verifier.TestMemberIsUndefined(media_stream_track.echo_return_loss);
        verifier.TestMemberIsUndefined(
            media_stream_track.echo_return_loss_enhancement);
        verifier.TestMemberIsUndefined(media_stream_track.total_audio_energy);
        verifier.TestMemberIsUndefined(media_stream_track.total_samples_duration);
        verifier.TestMemberIsUndefined(media_stream_track.total_samples_received);
        verifier.TestMemberIsUndefined(media_stream_track.concealed_samples);
        verifier.TestMemberIsUndefined(
            media_stream_track.silent_concealed_samples);
        verifier.TestMemberIsUndefined(media_stream_track.concealment_events);
        verifier.TestMemberIsUndefined(
            media_stream_track.inserted_samples_for_deceleration);
        verifier.TestMemberIsUndefined(
            media_stream_track.removed_samples_for_acceleration);
        verifier.TestMemberIsUndefined(media_stream_track.jitter_buffer_flushes);
        verifier.TestMemberIsUndefined(
            media_stream_track.delayed_packet_outage_samples);
        verifier.TestMemberIsUndefined(
            media_stream_track.relative_packet_arrival_delay);
        verifier.TestMemberIsUndefined(media_stream_track.interruption_count);
        verifier.TestMemberIsUndefined(
            media_stream_track.total_interruption_duration);
        verifier.TestMemberIsUndefined(
            media_stream_track.jitter_buffer_target_delay);
      } else {
        RTC_DCHECK_EQ(*media_stream_track.kind, RTCMediaStreamTrackKind::kAudio);
        // The type of the referenced media source depends on kind.
        if (*media_stream_track.remote_source) {
          // Remote tracks don't have media source stats.
          verifier.TestMemberIsUndefined(media_stream_track.media_source_id);
          verifier.TestMemberIsNonNegative<double>(
              media_stream_track.jitter_buffer_delay);
          verifier.TestMemberIsNonNegative<uint64_t>(
              media_stream_track.jitter_buffer_emitted_count);
          verifier.TestMemberIsNonNegative<double>(
              media_stream_track.jitter_buffer_target_delay);
          verifier.TestMemberIsPositive<double>(media_stream_track.audio_level);
          verifier.TestMemberIsPositive<double>(
              media_stream_track.total_audio_energy);
          verifier.TestMemberIsPositive<uint64_t>(
              media_stream_track.total_samples_received);
          verifier.TestMemberIsPositive<double>(
              media_stream_track.total_samples_duration);
          verifier.TestMemberIsNonNegative<uint64_t>(
              media_stream_track.concealed_samples);
          verifier.TestMemberIsNonNegative<uint64_t>(
              media_stream_track.silent_concealed_samples);
          verifier.TestMemberIsNonNegative<uint64_t>(
              media_stream_track.concealment_events);
          verifier.TestMemberIsNonNegative<uint64_t>(
              media_stream_track.inserted_samples_for_deceleration);
          verifier.TestMemberIsNonNegative<uint64_t>(
              media_stream_track.removed_samples_for_acceleration);
          verifier.TestMemberIsNonNegative<uint64_t>(
              media_stream_track.jitter_buffer_flushes);
          verifier.TestMemberIsNonNegative<uint64_t>(
              media_stream_track.delayed_packet_outage_samples);
          verifier.TestMemberIsNonNegative<double>(
              media_stream_track.relative_packet_arrival_delay);
          verifier.TestMemberIsNonNegative<uint32_t>(
              media_stream_track.interruption_count);
          verifier.TestMemberIsNonNegative<double>(
              media_stream_track.total_interruption_duration);
        } else {
          verifier.TestMemberIsIDReference(media_stream_track.media_source_id,
                                           RTCAudioSourceStats::kType);
          // Local audio tracks have no jitter buffer.
          verifier.TestMemberIsUndefined(media_stream_track.jitter_buffer_delay);
          verifier.TestMemberIsUndefined(
              media_stream_track.jitter_buffer_emitted_count);
          verifier.TestMemberIsUndefined(
              media_stream_track.jitter_buffer_target_delay);
          verifier.TestMemberIsUndefined(media_stream_track.audio_level);
          verifier.TestMemberIsUndefined(media_stream_track.total_audio_energy);
          verifier.TestMemberIsUndefined(
              media_stream_track.total_samples_received);
          verifier.TestMemberIsUndefined(
              media_stream_track.total_samples_duration);
          verifier.TestMemberIsUndefined(media_stream_track.concealed_samples);
          verifier.TestMemberIsUndefined(
              media_stream_track.silent_concealed_samples);
          verifier.TestMemberIsUndefined(media_stream_track.concealment_events);
          verifier.TestMemberIsUndefined(
              media_stream_track.inserted_samples_for_deceleration);
          verifier.TestMemberIsUndefined(
              media_stream_track.removed_samples_for_acceleration);
          verifier.TestMemberIsUndefined(
              media_stream_track.jitter_buffer_flushes);
          verifier.TestMemberIsUndefined(
              media_stream_track.delayed_packet_outage_samples);
          verifier.TestMemberIsUndefined(
              media_stream_track.relative_packet_arrival_delay);
          verifier.TestMemberIsUndefined(media_stream_track.interruption_count);
          verifier.TestMemberIsUndefined(
              media_stream_track.total_interruption_duration);
        }
        // Video-only members should be undefined
        verifier.TestMemberIsUndefined(media_stream_track.frame_width);
        verifier.TestMemberIsUndefined(media_stream_track.frame_height);
        verifier.TestMemberIsUndefined(media_stream_track.frames_per_second);
        verifier.TestMemberIsUndefined(media_stream_track.frames_sent);
        verifier.TestMemberIsUndefined(media_stream_track.huge_frames_sent);
        verifier.TestMemberIsUndefined(media_stream_track.frames_received);
        verifier.TestMemberIsUndefined(media_stream_track.frames_decoded);
        verifier.TestMemberIsUndefined(media_stream_track.frames_dropped);
        verifier.TestMemberIsUndefined(media_stream_track.frames_corrupted);
        verifier.TestMemberIsUndefined(media_stream_track.partial_frames_lost);
        verifier.TestMemberIsUndefined(media_stream_track.full_frames_lost);
        verifier.TestMemberIsUndefined(media_stream_track.freeze_count);
        verifier.TestMemberIsUndefined(media_stream_track.pause_count);
        verifier.TestMemberIsUndefined(media_stream_track.total_freezes_duration);
        verifier.TestMemberIsUndefined(media_stream_track.total_pauses_duration);
        verifier.TestMemberIsUndefined(media_stream_track.total_frames_duration);
        verifier.TestMemberIsUndefined(
            media_stream_track.sum_squared_frame_durations);
        // Audio-only members
        // TODO(hbos): |echo_return_loss| and |echo_return_loss_enhancement| are
        // flaky on msan bot (sometimes defined, sometimes undefined). Should the
        // test run until available or is there a way to have it always be
        // defined? crbug.com/627816
        verifier.MarkMemberTested(media_stream_track.echo_return_loss, true);
        verifier.MarkMemberTested(media_stream_track.echo_return_loss_enhancement,
                                  true);
      }
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
    bool VerifyRTCPeerConnectionStats(
        const RTCPeerConnectionStats& peer_connection) {
      RTCStatsVerifier verifier(report_, &peer_connection);
      verifier.TestMemberIsNonNegative<uint32_t>(
          peer_connection.data_channels_opened);
      verifier.TestMemberIsNonNegative<uint32_t>(
          peer_connection.data_channels_closed);
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
    void VerifyRTCRTPStreamStats(const RTCRTPStreamStats& stream,
                                 RTCStatsVerifier& verifier) {
      verifier.TestMemberIsDefined(stream.ssrc);
      verifier.TestMemberIsDefined(stream.kind);
      // Some legacy metrics are only defined for some of the RTP types in the
      // hierarcy.
      if (stream.type() == RTCInboundRTPStreamStats::kType ||
          stream.type() == RTCOutboundRTPStreamStats::kType) {
        verifier.TestMemberIsDefined(stream.media_type);
        verifier.TestMemberIsIDReference(stream.track_id,
                                         RTCMediaStreamTrackStats::kType);
      } else {
        verifier.TestMemberIsUndefined(stream.media_type);
        verifier.TestMemberIsUndefined(stream.track_id);
      }
      verifier.TestMemberIsIDReference(stream.transport_id,
                                       RTCTransportStats::kType);
      verifier.TestMemberIsIDReference(stream.codec_id, RTCCodecStats::kType);
    }
  
    void VerifyRTCSentRTPStreamStats(const RTCSentRtpStreamStats& sent_stream,
                                     RTCStatsVerifier& verifier) {
      VerifyRTCRTPStreamStats(sent_stream, verifier);
      verifier.TestMemberIsDefined(sent_stream.packets_sent);
      verifier.TestMemberIsDefined(sent_stream.bytes_sent);
    }
  
    bool VerifyRTCInboundRTPStreamStats(
        const RTCInboundRTPStreamStats& inbound_stream) {
      RTCStatsVerifier verifier(report_, &inbound_stream);
      VerifyRTCReceivedRtpStreamStats(inbound_stream, verifier);
      verifier.TestMemberIsOptionalIDReference(
          inbound_stream.remote_id, RTCRemoteOutboundRtpStreamStats::kType);
      if (inbound_stream.media_type.is_defined() &&
          *inbound_stream.media_type == "video") {
        verifier.TestMemberIsNonNegative<uint64_t>(inbound_stream.qp_sum);
        verifier.TestMemberIsDefined(inbound_stream.decoder_implementation);
      } else {
        verifier.TestMemberIsUndefined(inbound_stream.qp_sum);
        verifier.TestMemberIsUndefined(inbound_stream.decoder_implementation);
      }
      verifier.TestMemberIsNonNegative<uint32_t>(inbound_stream.packets_received);
      if (inbound_stream.media_type.is_defined() &&
          *inbound_stream.media_type == "audio") {
        verifier.TestMemberIsNonNegative<uint64_t>(
            inbound_stream.fec_packets_received);
        verifier.TestMemberIsNonNegative<uint64_t>(
            inbound_stream.fec_packets_discarded);
      } else {
        verifier.TestMemberIsUndefined(inbound_stream.fec_packets_received);
        verifier.TestMemberIsUndefined(inbound_stream.fec_packets_discarded);
      }
      verifier.TestMemberIsNonNegative<uint64_t>(inbound_stream.bytes_received);
      verifier.TestMemberIsNonNegative<uint64_t>(
          inbound_stream.header_bytes_received);
      verifier.TestMemberIsDefined(inbound_stream.last_packet_received_timestamp);
      if (inbound_stream.frames_received.ValueOrDefault(0) > 0) {
        verifier.TestMemberIsNonNegative<uint32_t>(inbound_stream.frame_width);
        verifier.TestMemberIsNonNegative<uint32_t>(inbound_stream.frame_height);
      } else {
        verifier.TestMemberIsUndefined(inbound_stream.frame_width);
        verifier.TestMemberIsUndefined(inbound_stream.frame_height);
      }
      if (inbound_stream.frames_per_second.is_defined()) {
        verifier.TestMemberIsNonNegative<double>(
            inbound_stream.frames_per_second);
      } else {
        verifier.TestMemberIsUndefined(inbound_stream.frames_per_second);
      }
      verifier.TestMemberIsUndefined(inbound_stream.frame_bit_depth);
      verifier.TestMemberIsNonNegative<double>(
          inbound_stream.jitter_buffer_delay);
      verifier.TestMemberIsNonNegative<uint64_t>(
          inbound_stream.jitter_buffer_emitted_count);
      if (inbound_stream.media_type.is_defined() &&
          *inbound_stream.media_type == "video") {
        verifier.TestMemberIsUndefined(inbound_stream.total_samples_received);
        verifier.TestMemberIsUndefined(inbound_stream.concealed_samples);
        verifier.TestMemberIsUndefined(inbound_stream.silent_concealed_samples);
        verifier.TestMemberIsUndefined(inbound_stream.concealment_events);
        verifier.TestMemberIsUndefined(
            inbound_stream.inserted_samples_for_deceleration);
        verifier.TestMemberIsUndefined(
            inbound_stream.removed_samples_for_acceleration);
        verifier.TestMemberIsUndefined(inbound_stream.audio_level);
        verifier.TestMemberIsUndefined(inbound_stream.total_audio_energy);
        verifier.TestMemberIsUndefined(inbound_stream.total_samples_duration);
        verifier.TestMemberIsNonNegative<int32_t>(inbound_stream.frames_received);
        verifier.TestMemberIsNonNegative<uint32_t>(inbound_stream.fir_count);
        verifier.TestMemberIsNonNegative<uint32_t>(inbound_stream.pli_count);
        verifier.TestMemberIsNonNegative<uint32_t>(inbound_stream.nack_count);
      } else {
        verifier.TestMemberIsUndefined(inbound_stream.fir_count);
        verifier.TestMemberIsUndefined(inbound_stream.pli_count);
        verifier.TestMemberIsUndefined(inbound_stream.nack_count);
        verifier.TestMemberIsPositive<uint64_t>(
            inbound_stream.total_samples_received);
        verifier.TestMemberIsNonNegative<uint64_t>(
            inbound_stream.concealed_samples);
        verifier.TestMemberIsNonNegative<uint64_t>(
            inbound_stream.silent_concealed_samples);
        verifier.TestMemberIsNonNegative<uint64_t>(
            inbound_stream.concealment_events);
        verifier.TestMemberIsNonNegative<uint64_t>(
            inbound_stream.inserted_samples_for_deceleration);
        verifier.TestMemberIsNonNegative<uint64_t>(
            inbound_stream.removed_samples_for_acceleration);
        verifier.TestMemberIsPositive<double>(inbound_stream.audio_level);
        verifier.TestMemberIsPositive<double>(inbound_stream.total_audio_energy);
        verifier.TestMemberIsPositive<double>(
            inbound_stream.total_samples_duration);
        verifier.TestMemberIsUndefined(inbound_stream.frames_received);
      }
      verifier.TestMemberIsUndefined(inbound_stream.round_trip_time);
      verifier.TestMemberIsUndefined(inbound_stream.packets_discarded);
      verifier.TestMemberIsUndefined(inbound_stream.packets_repaired);
      verifier.TestMemberIsUndefined(inbound_stream.burst_packets_lost);
      verifier.TestMemberIsUndefined(inbound_stream.burst_packets_discarded);
      verifier.TestMemberIsUndefined(inbound_stream.burst_loss_count);
      verifier.TestMemberIsUndefined(inbound_stream.burst_discard_count);
      verifier.TestMemberIsUndefined(inbound_stream.burst_loss_rate);
      verifier.TestMemberIsUndefined(inbound_stream.burst_discard_rate);
      verifier.TestMemberIsUndefined(inbound_stream.gap_loss_rate);
      verifier.TestMemberIsUndefined(inbound_stream.gap_discard_rate);
      // Test runtime too short to get an estimate (at least two RTCP sender
      // reports need to be received).
      verifier.MarkMemberTested(inbound_stream.estimated_playout_timestamp, true);
      if (inbound_stream.media_type.is_defined() &&
          *inbound_stream.media_type == "video") {
        verifier.TestMemberIsDefined(inbound_stream.frames_decoded);
        verifier.TestMemberIsDefined(inbound_stream.key_frames_decoded);
        verifier.TestMemberIsNonNegative<uint32_t>(inbound_stream.frames_dropped);
        verifier.TestMemberIsNonNegative<double>(
            inbound_stream.total_decode_time);
        verifier.TestMemberIsNonNegative<double>(
            inbound_stream.total_inter_frame_delay);
        verifier.TestMemberIsNonNegative<double>(
            inbound_stream.total_squared_inter_frame_delay);
        // The integration test is not set up to test screen share; don't require
        // this to be present.
        verifier.MarkMemberTested(inbound_stream.content_type, true);
      } else {
        verifier.TestMemberIsUndefined(inbound_stream.frames_decoded);
        verifier.TestMemberIsUndefined(inbound_stream.key_frames_decoded);
        verifier.TestMemberIsUndefined(inbound_stream.frames_dropped);
        verifier.TestMemberIsUndefined(inbound_stream.total_decode_time);
        verifier.TestMemberIsUndefined(inbound_stream.total_inter_frame_delay);
        verifier.TestMemberIsUndefined(
            inbound_stream.total_squared_inter_frame_delay);
        verifier.TestMemberIsUndefined(inbound_stream.content_type);
      }
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
    bool VerifyRTCOutboundRTPStreamStats(
        const RTCOutboundRTPStreamStats& outbound_stream) {
      RTCStatsVerifier verifier(report_, &outbound_stream);
      VerifyRTCRTPStreamStats(outbound_stream, verifier);
      if (outbound_stream.media_type.is_defined() &&
          *outbound_stream.media_type == "video") {
        verifier.TestMemberIsIDReference(outbound_stream.media_source_id,
                                         RTCVideoSourceStats::kType);
        verifier.TestMemberIsNonNegative<uint32_t>(outbound_stream.fir_count);
        verifier.TestMemberIsNonNegative<uint32_t>(outbound_stream.pli_count);
        if (*outbound_stream.frames_encoded > 0) {
          verifier.TestMemberIsNonNegative<uint64_t>(outbound_stream.qp_sum);
        } else {
          verifier.TestMemberIsUndefined(outbound_stream.qp_sum);
        }
      } else {
        verifier.TestMemberIsUndefined(outbound_stream.fir_count);
        verifier.TestMemberIsUndefined(outbound_stream.pli_count);
        verifier.TestMemberIsIDReference(outbound_stream.media_source_id,
                                         RTCAudioSourceStats::kType);
        verifier.TestMemberIsUndefined(outbound_stream.qp_sum);
      }
      verifier.TestMemberIsNonNegative<uint32_t>(outbound_stream.nack_count);
      verifier.TestMemberIsOptionalIDReference(
          outbound_stream.remote_id, RTCRemoteInboundRtpStreamStats::kType);
      verifier.TestMemberIsNonNegative<uint32_t>(outbound_stream.packets_sent);
      verifier.TestMemberIsNonNegative<uint64_t>(
          outbound_stream.retransmitted_packets_sent);
      verifier.TestMemberIsNonNegative<uint64_t>(outbound_stream.bytes_sent);
      verifier.TestMemberIsNonNegative<uint64_t>(
          outbound_stream.header_bytes_sent);
      verifier.TestMemberIsNonNegative<uint64_t>(
          outbound_stream.retransmitted_bytes_sent);
      verifier.TestMemberIsUndefined(outbound_stream.target_bitrate);
      if (outbound_stream.media_type.is_defined() &&
          *outbound_stream.media_type == "video") {
        verifier.TestMemberIsDefined(outbound_stream.frames_encoded);
        verifier.TestMemberIsDefined(outbound_stream.key_frames_encoded);
        verifier.TestMemberIsNonNegative<double>(
            outbound_stream.total_encode_time);
        verifier.TestMemberIsNonNegative<uint64_t>(
            outbound_stream.total_encoded_bytes_target);
        verifier.TestMemberIsNonNegative<double>(
            outbound_stream.total_packet_send_delay);
        verifier.TestMemberIsDefined(outbound_stream.quality_limitation_reason);
        verifier.TestMemberIsDefined(
            outbound_stream.quality_limitation_durations);
        verifier.TestMemberIsNonNegative<uint32_t>(
            outbound_stream.quality_limitation_resolution_changes);
        // The integration test is not set up to test screen share; don't require
        // this to be present.
        verifier.MarkMemberTested(outbound_stream.content_type, true);
        verifier.TestMemberIsDefined(outbound_stream.encoder_implementation);
        // Unless an implementation-specific amount of time has passed and at
        // least one frame has been encoded, undefined is reported. Because it
        // is hard to tell what is the case here, we treat FPS as optional.
        // TODO(hbos): Update the tests to run until all implemented metrics
        // should be populated.
        if (outbound_stream.frames_per_second.is_defined()) {
          verifier.TestMemberIsNonNegative<double>(
              outbound_stream.frames_per_second);
        } else {
          verifier.TestMemberIsUndefined(outbound_stream.frames_per_second);
        }
        verifier.TestMemberIsNonNegative<uint32_t>(outbound_stream.frame_height);
        verifier.TestMemberIsNonNegative<uint32_t>(outbound_stream.frame_width);
        verifier.TestMemberIsNonNegative<uint32_t>(outbound_stream.frames_sent);
        verifier.TestMemberIsNonNegative<uint32_t>(
            outbound_stream.huge_frames_sent);
        verifier.MarkMemberTested(outbound_stream.rid, true);
      } else {
        verifier.TestMemberIsUndefined(outbound_stream.frames_encoded);
        verifier.TestMemberIsUndefined(outbound_stream.key_frames_encoded);
        verifier.TestMemberIsUndefined(outbound_stream.total_encode_time);
        verifier.TestMemberIsUndefined(
            outbound_stream.total_encoded_bytes_target);
        // TODO(https://crbug.com/webrtc/10635): Implement for audio as well.
        verifier.TestMemberIsUndefined(outbound_stream.total_packet_send_delay);
        verifier.TestMemberIsUndefined(outbound_stream.quality_limitation_reason);
        verifier.TestMemberIsUndefined(
            outbound_stream.quality_limitation_durations);
        verifier.TestMemberIsUndefined(
            outbound_stream.quality_limitation_resolution_changes);
        verifier.TestMemberIsUndefined(outbound_stream.content_type);
        // TODO(hbos): Implement for audio as well.
        verifier.TestMemberIsUndefined(outbound_stream.encoder_implementation);
        verifier.TestMemberIsUndefined(outbound_stream.rid);
        verifier.TestMemberIsUndefined(outbound_stream.frames_per_second);
        verifier.TestMemberIsUndefined(outbound_stream.frame_height);
        verifier.TestMemberIsUndefined(outbound_stream.frame_width);
        verifier.TestMemberIsUndefined(outbound_stream.frames_sent);
        verifier.TestMemberIsUndefined(outbound_stream.huge_frames_sent);
      }
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
    void VerifyRTCReceivedRtpStreamStats(
        const RTCReceivedRtpStreamStats& received_rtp,
        RTCStatsVerifier& verifier) {
      VerifyRTCRTPStreamStats(received_rtp, verifier);
      verifier.TestMemberIsNonNegative<double>(received_rtp.jitter);
      verifier.TestMemberIsDefined(received_rtp.packets_lost);
    }
  
    bool VerifyRTCRemoteInboundRtpStreamStats(
        const RTCRemoteInboundRtpStreamStats& remote_inbound_stream) {
      RTCStatsVerifier verifier(report_, &remote_inbound_stream);
      VerifyRTCReceivedRtpStreamStats(remote_inbound_stream, verifier);
      verifier.TestMemberIsDefined(remote_inbound_stream.fraction_lost);
      verifier.TestMemberIsIDReference(remote_inbound_stream.local_id,
                                       RTCOutboundRTPStreamStats::kType);
      verifier.TestMemberIsNonNegative<double>(
          remote_inbound_stream.round_trip_time);
      verifier.TestMemberIsNonNegative<double>(
          remote_inbound_stream.total_round_trip_time);
      verifier.TestMemberIsNonNegative<int32_t>(
          remote_inbound_stream.round_trip_time_measurements);
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
    bool VerifyRTCRemoteOutboundRTPStreamStats(
        const RTCRemoteOutboundRtpStreamStats& remote_outbound_stream) {
      RTCStatsVerifier verifier(report_, &remote_outbound_stream);
      VerifyRTCRTPStreamStats(remote_outbound_stream, verifier);
      VerifyRTCSentRTPStreamStats(remote_outbound_stream, verifier);
      verifier.TestMemberIsIDReference(remote_outbound_stream.local_id,
                                       RTCOutboundRTPStreamStats::kType);
      verifier.TestMemberIsNonNegative<double>(
          remote_outbound_stream.remote_timestamp);
      verifier.TestMemberIsDefined(remote_outbound_stream.reports_sent);
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
    void VerifyRTCMediaSourceStats(const RTCMediaSourceStats& media_source,
                                   RTCStatsVerifier* verifier) {
      verifier->TestMemberIsDefined(media_source.track_identifier);
      verifier->TestMemberIsDefined(media_source.kind);
      if (media_source.kind.is_defined()) {
        EXPECT_TRUE((*media_source.kind == "audio" &&
                     media_source.type() == RTCAudioSourceStats::kType) ||
                    (*media_source.kind == "video" &&
                     media_source.type() == RTCVideoSourceStats::kType));
      }
    }
  
    bool VerifyRTCAudioSourceStats(const RTCAudioSourceStats& audio_source) {
      RTCStatsVerifier verifier(report_, &audio_source);
      VerifyRTCMediaSourceStats(audio_source, &verifier);
      // Audio level, unlike audio energy, only gets updated at a certain
      // frequency, so we don't require that one to be positive to avoid a race
      // (https://crbug.com/webrtc/10962).
      verifier.TestMemberIsNonNegative<double>(audio_source.audio_level);
      verifier.TestMemberIsPositive<double>(audio_source.total_audio_energy);
      verifier.TestMemberIsPositive<double>(audio_source.total_samples_duration);
      // TODO(hbos): |echo_return_loss| and |echo_return_loss_enhancement| are
      // flaky on msan bot (sometimes defined, sometimes undefined). Should the
      // test run until available or is there a way to have it always be
      // defined? crbug.com/627816
      verifier.MarkMemberTested(audio_source.echo_return_loss, true);
      verifier.MarkMemberTested(audio_source.echo_return_loss_enhancement, true);
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
    bool VerifyRTCVideoSourceStats(const RTCVideoSourceStats& video_source) {
      RTCStatsVerifier verifier(report_, &video_source);
      VerifyRTCMediaSourceStats(video_source, &verifier);
      // TODO(hbos): This integration test uses fakes that doesn't support
      // VideoTrackSourceInterface::Stats. When this is fixed we should
      // TestMemberIsNonNegative<uint32_t>() for |width| and |height| instead to
      // reflect real code.
      verifier.TestMemberIsUndefined(video_source.width);
      verifier.TestMemberIsUndefined(video_source.height);
      verifier.TestMemberIsNonNegative<uint32_t>(video_source.frames);
      verifier.TestMemberIsNonNegative<uint32_t>(video_source.frames_per_second);
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
    bool VerifyRTCTransportStats(const RTCTransportStats& transport) {
      RTCStatsVerifier verifier(report_, &transport);
      verifier.TestMemberIsNonNegative<uint64_t>(transport.bytes_sent);
      verifier.TestMemberIsNonNegative<uint64_t>(transport.packets_sent);
      verifier.TestMemberIsNonNegative<uint64_t>(transport.bytes_received);
      verifier.TestMemberIsNonNegative<uint64_t>(transport.packets_received);
      verifier.TestMemberIsOptionalIDReference(transport.rtcp_transport_stats_id,
                                               RTCTransportStats::kType);
      verifier.TestMemberIsDefined(transport.dtls_state);
      verifier.TestMemberIsIDReference(transport.selected_candidate_pair_id,
                                       RTCIceCandidatePairStats::kType);
      verifier.TestMemberIsIDReference(transport.local_certificate_id,
                                       RTCCertificateStats::kType);
      verifier.TestMemberIsIDReference(transport.remote_certificate_id,
                                       RTCCertificateStats::kType);
      verifier.TestMemberIsDefined(transport.tls_version);
      verifier.TestMemberIsDefined(transport.dtls_cipher);
      verifier.TestMemberIsDefined(transport.srtp_cipher);
      verifier.TestMemberIsPositive<uint32_t>(
          transport.selected_candidate_pair_changes);
      return verifier.ExpectAllMembersSuccessfullyTested();
    }
  
   private:
    rtc::scoped_refptr<const RTCStatsReport> report_;
  };
  
  #ifdef WEBRTC_HAVE_SCTP
  TEST_F(RTCStatsIntegrationTest, GetStatsFromCaller) {
    StartCall();
  
    rtc::scoped_refptr<const RTCStatsReport> report = GetStatsFromCaller();
    RTCStatsReportVerifier(report.get()).VerifyReport({});
  
  #if RTC_TRACE_EVENTS_ENABLED
    EXPECT_EQ(report->ToJson(), RTCStatsReportTraceListener::last_trace());
    #endif
  }
  
  TEST_F(RTCStatsIntegrationTest, GetStatsFromCallee) {
    StartCall();
  
    rtc::scoped_refptr<const RTCStatsReport> report = GetStatsFromCallee();
    RTCStatsReportVerifier(report.get()).VerifyReport({});
  
  #if RTC_TRACE_EVENTS_ENABLED
    EXPECT_EQ(report->ToJson(), RTCStatsReportTraceListener::last_trace());
    #endif
  }
  
  // These tests exercise the integration of the stats selection algorithm inside
  // of PeerConnection. See rtcstatstraveral_unittest.cc for more detailed stats
  // traversal tests on particular stats graphs.
  TEST_F(RTCStatsIntegrationTest, GetStatsWithSenderSelector) {
    StartCall();
    ASSERT_FALSE(caller_->pc()->GetSenders().empty());
    rtc::scoped_refptr<const RTCStatsReport> report =
        GetStatsFromCaller(caller_->pc()->GetSenders()[0]);
    std::vector<const char*> allowed_missing_stats = {
        // TODO(hbos): Include RTC[Audio/Video]ReceiverStats when implemented.
        // TODO(hbos): Include RTCRemoteOutboundRtpStreamStats when implemented.
        // TODO(hbos): Include RTCRtpContributingSourceStats when implemented.
        RTCInboundRTPStreamStats::kType,
        RTCPeerConnectionStats::kType,
        RTCMediaStreamStats::kType,
        RTCDataChannelStats::kType,
    };
    RTCStatsReportVerifier(report.get()).VerifyReport(allowed_missing_stats);
    EXPECT_TRUE(report->size());
  }
  
  TEST_F(RTCStatsIntegrationTest, GetStatsWithReceiverSelector) {
    StartCall();
  
    ASSERT_FALSE(caller_->pc()->GetReceivers().empty());
    rtc::scoped_refptr<const RTCStatsReport> report =
        GetStatsFromCaller(caller_->pc()->GetReceivers()[0]);
    std::vector<const char*> allowed_missing_stats = {
        // TODO(hbos): Include RTC[Audio/Video]SenderStats when implemented.
        // TODO(hbos): Include RTCRemoteInboundRtpStreamStats when implemented.
        // TODO(hbos): Include RTCRtpContributingSourceStats when implemented.
        RTCOutboundRTPStreamStats::kType,
        RTCPeerConnectionStats::kType,
        RTCMediaStreamStats::kType,
        RTCDataChannelStats::kType,
    };
    RTCStatsReportVerifier(report.get()).VerifyReport(allowed_missing_stats);
    EXPECT_TRUE(report->size());
  }
  
  TEST_F(RTCStatsIntegrationTest, GetStatsWithInvalidSenderSelector) {
    StartCall();
  
    ASSERT_FALSE(callee_->pc()->GetSenders().empty());
    // The selector is invalid for the caller because it belongs to the callee.
    auto invalid_selector = callee_->pc()->GetSenders()[0];
    rtc::scoped_refptr<const RTCStatsReport> report =
        GetStatsFromCaller(invalid_selector);
    EXPECT_FALSE(report->size());
  }
  
  TEST_F(RTCStatsIntegrationTest, GetStatsWithInvalidReceiverSelector) {
    StartCall();
  
    ASSERT_FALSE(callee_->pc()->GetReceivers().empty());
    // The selector is invalid for the caller because it belongs to the callee.
    auto invalid_selector = callee_->pc()->GetReceivers()[0];
    rtc::scoped_refptr<const RTCStatsReport> report =
        GetStatsFromCaller(invalid_selector);
    EXPECT_FALSE(report->size());
  }
  
  // TODO(bugs.webrtc.org/10041) For now this is equivalent to the following
  // test GetsStatsWhileClosingPeerConnection, because pc() is closed by
  // PeerConnectionTestWrapper. See: bugs.webrtc.org/9847
  TEST_F(RTCStatsIntegrationTest,
         DISABLED_GetStatsWhileDestroyingPeerConnection) {
    StartCall();
  
    rtc::scoped_refptr<RTCStatsObtainer> stats_obtainer =
        RTCStatsObtainer::Create();
    caller_->pc()->GetStats(stats_obtainer);
    // This will destroy the peer connection.
    caller_ = nullptr;
    // Any pending stats requests should have completed in the act of destroying
    // the peer connection.
    ASSERT_TRUE(stats_obtainer->report());
    #if RTC_TRACE_EVENTS_ENABLED
    EXPECT_EQ(stats_obtainer->report()->ToJson(),
              RTCStatsReportTraceListener::last_trace());
    #endif
  }
  
  TEST_F(RTCStatsIntegrationTest, GetsStatsWhileClosingPeerConnection) {
    StartCall();
  
    rtc::scoped_refptr<RTCStatsObtainer> stats_obtainer =
        RTCStatsObtainer::Create();
    caller_->pc()->GetStats(stats_obtainer);
    caller_->pc()->Close();
  
    ASSERT_TRUE(stats_obtainer->report());
    #if RTC_TRACE_EVENTS_ENABLED
    EXPECT_EQ(stats_obtainer->report()->ToJson(),
              RTCStatsReportTraceListener::last_trace());
    #endif
  }
  
  // GetStatsReferencedIds() is optimized to recognize what is or isn't a
  // referenced ID based on dictionary type information and knowing what members
  // are used as references, as opposed to iterating all members to find the ones
  // with the "Id" or "Ids" suffix. As such, GetStatsReferencedIds() is tested as
  // an integration test instead of a unit test in order to guard against adding
  // new references and forgetting to update GetStatsReferencedIds().
  TEST_F(RTCStatsIntegrationTest, GetStatsReferencedIds) {
    StartCall();
  
    rtc::scoped_refptr<const RTCStatsReport> report = GetStatsFromCallee();
    for (const RTCStats& stats : *report) {
      // Find all references by looking at all string members with the "Id" or
      // "Ids" suffix.
      std::set<const std::string*> expected_ids;
      for (const auto* member : stats.Members()) {
        if (!member->is_defined())
          continue;
        if (member->type() == RTCStatsMemberInterface::kString) {
          if (absl::EndsWith(member->name(), "Id")) {
            const auto& id = member->cast_to<const RTCStatsMember<std::string>>();
            expected_ids.insert(&(*id));
          }
        } else if (member->type() == RTCStatsMemberInterface::kSequenceString) {
          if (absl::EndsWith(member->name(), "Ids")) {
            const auto& ids =
                member->cast_to<const RTCStatsMember<std::vector<std::string>>>();
            for (const std::string& id : *ids)
              expected_ids.insert(&id);
          }
        }
      }
  
      std::vector<const std::string*> neighbor_ids = GetStatsReferencedIds(stats);
      EXPECT_EQ(neighbor_ids.size(), expected_ids.size());
      for (const std::string* neighbor_id : neighbor_ids) {
        EXPECT_THAT(expected_ids, Contains(neighbor_id));
      }
      for (const std::string* expected_id : expected_ids) {
        EXPECT_THAT(neighbor_ids, Contains(expected_id));
      }
    }
  }
  
  TEST_F(RTCStatsIntegrationTest, GetStatsContainsNoDuplicateMembers) {
    StartCall();
  
    rtc::scoped_refptr<const RTCStatsReport> report = GetStatsFromCallee();
    for (const RTCStats& stats : *report) {
      std::set<std::string> member_names;
      for (const auto* member : stats.Members()) {
        EXPECT_TRUE(member_names.find(member->name()) == member_names.end())
            << member->name() << " is a duplicate!";
        member_names.insert(member->name());
      }
    }
  }
  #endif  // WEBRTC_HAVE_SCTP
  
  }  // namespace
  
  }  // namespace webrtc
  