anchor.diff:            % ok, now how can we check the graph???  hmm.
           end,
   
  +        % run fetch
  +        fun() -> 
  +          { ok, _Data } = erlrrd:fetch([
  +            RRDFile, " AVERAGE ",
  +            io_lib:format(" --start ~B --end ~B", [ Then, Now ])
  +          ]),
  +          %?spew(Data),
  +          %TODO check data
  +          ok
  +        end,
  +
           % dump the rrd
           fun() -> 
             ?assertEnoent(RRDDump),
  
positive.code:             Response
            end
          },
  
          % info 
          fun() -> 
  
negative.code: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %%  eunit,  test starting and stopping.
  %% 
  
  -define(spew(Args), io:format(user, "~p~n", [{Args}])).
  test_start_stop_(StartFun, StopFun, Tag) -> 
    { spawn, 
      { inorder,
  