anchor.diff:  
   complicated(Config) when is_list(Config) ->
       Previous = get(),
  +    ok = match_keys(Previous),
       Previous = erase(),
       N = case ?t:is_debug() of
   	    false -> 500000;
  
positive.code: suite() -> [{ct_hooks,[ts_install_cth]}].
  
  all() -> 
      [simple, complicated, heavy, info].
  
  groups() -> 
      [].
  
negative.code: 
  -export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
  	 init_per_group/2,end_per_group/2,
  	 simple/1, complicated/1, heavy/1, simple_all_keys/1, info/1]).
  -export([init_per_testcase/2, end_per_testcase/2]).
  -export([other_process/2]).
  
  