Method OpenFileDescriptor

cpp/src/arrow/io/file_test.cc:99–105

  }

  void OpenFileDescriptor() {
    ASSERT_OK_AND_ASSIGN(auto file_name, PlatformFilename::FromString(path_));
    ASSERT_OK_AND_ASSIGN(
        FileDescriptor fd,
        FileOpenWritable(file_name, true /* write_only */, false /* truncate */));
    ASSERT_OK_AND_ASSIGN(file_, FileOutputStream::Open(fd.Detach()));
  }

 protected:
  std::shared_ptr<FileOutputStream> file_;