Method OpenFile

cpp/src/arrow/io/file_test.cc:95–97

class TestFileOutputStream : public FileTestFixture {
 public:
  void OpenFile(bool append = false) {
    ASSERT_OK_AND_ASSIGN(file_, FileOutputStream::Open(path_, append));
  }

  void OpenFileDescriptor() {
    ASSERT_OK_AND_ASSIGN(auto file_name, PlatformFilename::FromString(path_));