    static ChunkSpec validFramesThenInvalidFrames() {
      grpc::health::v1::HealthCheckResponse response;
      response.set_status(grpc::health::v1::HealthCheckResponse::SERVING);
      const auto data = Grpc::Common::serializeToGrpcFrame(response);
      std::vector<uint8_t> buffer_vector = std::vector<uint8_t>(data->length(), 0);
      data->copyOut(0, data->length(), &buffer_vector[0]);
      // Invalid frame here
      for (size_t i = 0; i < 6; i++) {
        buffer_vector.push_back(48); // Represents ASCII Character of 0
      }
      ChunkSpec spec;
      spec.valid = true;
      spec.data = buffer_vector;
      return spec;
    }
    static ChunkSpec validFramesThenInvalidFrames() {
      grpc::health::v1::HealthCheckResponse response;
      response.set_status(grpc::health::v1::HealthCheckResponse::SERVING);
      const auto data = Grpc::Common::serializeToGrpcFrame(response);
      std::vector<uint8_t> buffer_vector = std::vector<uint8_t>(data->length(), 0);
      data->copyOut(0, data->length(), &buffer_vector[0]);
       
      for (size_t i = 0; i < 6; i++) {
        buffer_vector.push_back(48);  
      }
      ChunkSpec spec;
      spec.valid = true;
      spec.data = buffer_vector;
      return spec;
    }