anchor.diff:      Offset = DataSize div 3,
       SizeToFetch = DataSize - Offset,
       DataCounterPid = spawn(?MODULE, data_counter, [SizeToFetch]),
  +    CounterPid = spawn(?MODULE, counter, [0]),
   
       WriteFunOpt = {write_fun,
           fun(_Handle, _Offset, Data) ->
  
positive.code: 
      %% when
      prepare_rtransfer({Worker1, RtransferOpts1}, {Worker2, RtransferOpts2},
          ?TEST_FILE_UUID, Offset, DataSize, notify_fun(), on_complete_fun(self())
      ),
  
      ?assertReceivedMatch({on_complete, {ok, SizeToFetch}}, ?TIMEOUT).
  
  %%%===================================================================
  %%% SetUp and TearDown functions
  
negative.code:         error_open_fun_test,
          error_read_fun_test,
          error_write_fun_test,
          offset_greater_than_file_size_test,
          request_bigger_than_file_test
      ].
  
  -define(FILE_HANDLE, <<"file_handle">>).
  