anchor.diff:  %%
   %% Description: Initialization before each test case group.
   %%--------------------------------------------------------------------
  -init_per_group(_group, Config) ->
  +init_per_group(_GroupName, Config) ->
       Config.
   
   %%--------------------------------------------------------------------
  
positive.code: %%      NB: By default, we export all 1-arity user defined functions
  %%--------------------------------------------------------------------
  all() ->
      [ {exports, Functions} | _ ] = ?MODULE:module_info(),
      [ FName || {FName, _} <- lists:filter(
                                 fun ({module_info,_}) -> false;
                                     ({all,_}) -> false;
                                     ({init_per_suite,1}) -> false;
                                     ({end_per_suite,1}) -> false;
                                     ({_,1}) -> true;
                                     ({_,_}) -> false
                                 end, Functions)].
  
negative.code: %%
  %% Description: Cleanup after each test case.
  %%--------------------------------------------------------------------
  end_per_testcase(_TestCase, Config) ->
      Config.
  
  test_{{testmod}}() ->
  