anchor.diff:  
   
   end_per_testcase(_, _Config) ->
  -	case ets:info(?ETS) of 
  +	case ets:info(?ETS) of
   		undefined -> ok;
   		Info when is_list(Info) -> ets:delete(?ETS)
   	end,
  
positive.code: %% ====================================================================
  %% API functions
  %% ====================================================================
  -export([groups/0, all/0,
  		 init_per_group/2, end_per_group/2,
  		 init_per_testcase/2, end_per_testcase/2]).
  -export([application_startup/1,
  		 consume_base/1, consume_error/1]).
  -export([handle_deliver/1, handle_error/1]).
  
negative.code: init_all(Config) ->
  	?APP:start(),
  	Config.
  
  
  init_per_testcase(_, Config) ->
  	?ETS = ets:new(?ETS, [named_table, public, set]),
  