Method CreateStdinWithData

cpp/src/arrow/io/file_test.cc:1124–1132

class TestStdio : public FileTestFixture {
 public:
  void CreateStdinWithData(const char* data, size_t size) {
    EnsureFileDeleted();

    ASSERT_OK_AND_ASSIGN(auto file, FileOutputStream::Open(path_, false));
    ASSERT_OK(file->Write(data, size));
    ASSERT_OK(file->Close());
    cin_.reset(new std::ifstream(path_));
    std::cin.rdbuf(cin_->rdbuf());
  }

 protected:
  std::shared_ptr<std::ifstream> cin_;