anchor.diff:      ls_test/1,
       readdir_plus_test/1,
       get_child_attr_test/1,
  +    rm_dir_test/1,
   
       create_file_test/1,
       open_for_read_test/1,
       open_for_write_test/1,
       open_for_rdwr_test/1,
       create_and_open_test/1,
  +    truncate_test/1,
  +    rm_file_test/1,
   
       get_parent_test/1,
       get_file_path_test/1,
  
positive.code:             ParentDirPath = <<TestCaseRootDirPath/binary, "/dir1">>,
              ParentDirGuid = maps:get(ParentDirPath, ExtraData),
              lfm_proxy:create_and_open(W, SessId, ParentDirGuid, <<"file1">>, 8#777)
          end
      }, Config).
  
  
negative.code:     ComplementaryPermsPerFile, AllRequiredPerms, ExtraData, group
  ) ->
      OperationRequiresOwnership = lists:any(fun({_, Perm}) ->
          Perm == owner
      end, AllRequiredPerms),
  
      case OperationRequiresOwnership of
  