Method ToCsvString

cpp/src/arrow/csv/writer_test.cc:315–322

 protected:
  template <typename Data>
  Result<std::string> ToCsvString(const Data& data, const WriteOptions& options) {
    std::shared_ptr<io::BufferOutputStream> out;
    ARROW_ASSIGN_OR_RAISE(out, io::BufferOutputStream::Create());

    RETURN_NOT_OK(WriteCSV(data, options, out.get()));
    ARROW_ASSIGN_OR_RAISE(std::shared_ptr<Buffer> buffer, out->Finish());
    return std::string(reinterpret_cast<const char*>(buffer->data()), buffer->size());
  }

  Result<std::string> ToCsvStringUsingWriter(const Table& data,
                                             const WriteOptions& options) {