}

TEST(MetricsTest, TestReadFingerprint) {
  EXPECT_EQ(SavedModelReadFingerprint().value(), "");
  SavedModelReadFingerprint().Set("foo");
  EXPECT_EQ(SavedModelReadFingerprint().value(), "foo");
  SavedModelReadFingerprint().Set("bar");
  EXPECT_EQ(SavedModelReadFingerprint().value(), "bar");
}

TEST(MetricsTest, TestReadPath) {
  EXPECT_EQ(SavedModelReadPath().value(), "");

  EXPECT_EQ(metrics::SavedModelReadPath().value(), export_dir);

  Json::Value fingerprint = Json::objectValue;
  Json::Reader reader = Json::Reader();
  reader.parse(metrics::SavedModelReadFingerprint().value(), fingerprint);
  EXPECT_EQ(fingerprint["saved_model_checksum"].asUInt64(),
            15788619162413586750ULL);
  EXPECT_EQ(fingerprint["graph_def_program_hash"].asUInt64(),

// Returns "/tensorflow/core/saved_model/read/fingerprint" cell, wich contains
// the saved_model_checksum of the SM's fingerprint when it is imported.
monitoring::GaugeCell<std::string>& SavedModelReadFingerprint();

// Returns "/tensorflow/core/saved_model/read/path" cell, wich contains
// the saved_model_path of the SM when it is imported.
monitoring::GaugeCell<std::string>& SavedModelReadPath();

  }
  // Read the fingerprint.
  auto fingerprint_proto =
      saved_model::fingerprinting::ReadSavedModelFingerprint(export_dir);
  if (fingerprint_proto.ok()) {
    metrics::SavedModelReadFingerprint().Set(
        metrics::MakeFingerprintJson(fingerprint_proto.value()));

    TF_ASSIGN_OR_RETURN(
        std::string path_and_singleprint,
        metrics::MakeSavedModelPathAndSingleprint(

}

monitoring::CounterCell& SavedModelReadApi(absl::string_view api_label) {
  return *saved_model_read_api->GetCell(std::string(api_label));
}

monitoring::GaugeCell<std::string>& SavedModelReadFingerprint() {
  return *saved_model_read_fingerprint->GetCell();
}

monitoring::GaugeCell<std::string>& SavedModelReadPath() {
  return *saved_model_read_path->GetCell();
}

                              {kSavedModelTagServe}, &bundle));

  EXPECT_EQ(metrics::SavedModelReadPath().value(), export_dir);

  EXPECT_EQ(metrics::SavedModelReadFingerprint().value(),
            kV2ModuleSavedModelChecksum);
}

}  // namespace

  auto fingerprint_proto =
      saved_model::fingerprinting::ReadSavedModelFingerprint(export_dir);
  if (fingerprint_proto.ok()) {
    // Set gauge cell with saved_model_checksum.
    metrics::SavedModelReadFingerprint().Set(
        std::to_string(fingerprint_proto->saved_model_checksum()));
  }

  // TODO(robson): Add tests for the counters.
  const uint64 start_microseconds = Env::Default()->NowMicros();