Method TestMoveDir

cpp/src/arrow/filesystem/test_util.cc:471–532

}

void GenericFileSystemTest::TestMoveDir(FileSystem* fs) {
  if (!allow_move_dir()) {
    GTEST_SKIP() << "Filesystem doesn't allow moving directories";
  }

  ASSERT_OK(fs->CreateDir("AB/CD"));
  ASSERT_OK(fs->CreateDir("EF"));
  CreateFile(fs, "AB/abc", "abc data");
  CreateFile(fs, "AB/CD/def", "def data");
  CreateFile(fs, "EF/ghi", "ghi data");
  AssertAllDirs(fs, {"AB", "AB/CD", "EF"});
  AssertAllFiles(fs, {"AB/CD/def", "AB/abc", "EF/ghi"});

  // Move inside root dir
  ASSERT_OK(fs->Move("AB", "GH"));
  AssertAllDirs(fs, {"EF", "GH", "GH/CD"});
  AssertAllFiles(fs, {"EF/ghi", "GH/CD/def", "GH/abc"});

  // Move out of root dir
  ASSERT_OK(fs->Move("GH", "EF/IJ"));
  AssertAllDirs(fs, {"EF", "EF/IJ", "EF/IJ/CD"});
  AssertAllFiles(fs, {"EF/IJ/CD/def", "EF/IJ/abc", "EF/ghi"});

  // Move back into root dir
  ASSERT_OK(fs->Move("EF/IJ", "KL"));
  AssertAllDirs(fs, {"EF", "KL", "KL/CD"});
  AssertAllFiles(fs, {"EF/ghi", "KL/CD/def", "KL/abc"});

  // Overwrite file with directory => untested (implementation-dependent)

  // Identical source and destination: allowed to succeed or raise IOError,
  // but should not lose data.
  Status st = fs->Move("KL", "KL");
  if (!st.ok()) {
    ASSERT_RAISES(IOError, st);
  }
  AssertAllDirs(fs, {"EF", "KL", "KL/CD"});
  AssertAllFiles(fs, {"EF/ghi", "KL/CD/def", "KL/abc"});

  // Cannot move directory inside itself
  ASSERT_RAISES(IOError, fs->Move("KL", "KL/ZZ"));

  // Contents didn't change
  AssertAllDirs(fs, {"EF", "KL", "KL/CD"});
  AssertFileContents(fs, "KL/abc", "abc data");
  AssertFileContents(fs, "KL/CD/def", "def data");

  // Destination is a non-empty directory
  if (!allow_move_dir_over_non_empty_dir()) {
    ASSERT_RAISES(IOError, fs->Move("KL", "EF"));
    AssertAllDirs(fs, {"EF", "KL", "KL/CD"});
    AssertAllFiles(fs, {"EF/ghi", "KL/CD/def", "KL/abc"});
  } else {
    // In some filesystems such as HDFS, this operation is interpreted
    // as with the Unix `mv` command, i.e. move KL *inside* EF.
    ASSERT_OK(fs->Move("KL", "EF"));
    AssertAllDirs(fs, {"EF", "EF/KL", "EF/KL/CD"});
    AssertAllFiles(fs, {"EF/KL/CD/def", "EF/KL/abc", "EF/ghi"});