ISO9660Directory dir_abcdefgh = root.addDirectory("abcdefgh");
dir_abcdefgh.addDirectory("abcdefgh");
dir_abcdefgh.addDirectory("abcdefgh");
ISO9660Directory dir_abcde321 = root.addDirectory("abcde321");
dir_abcde321.addDirectory("abcde321");
dir_abcde321.addDirectory("abcde321");
// Additional test cases
// (file without extension, tar.gz, deeply nested directory;
// sort order tests, renaming tests: filename + extension,