anchor.diff:      %% kill process
       syn_test_suite_helper:kill_process(Pid).
   
  -single_node_when_mnesia_is_disc_find_by_key(_Config) ->
  -    %% set schema location
  -    application:set_env(mnesia, schema_location, disc),
  -    %% create schema
  -    mnesia:create_schema([node()]),
  -    %% start
  -    ok = syn:start(),
  -    %% start process
  -    Pid = syn_test_suite_helper:start_process(),
  -    %% retrieve
  -    undefined = syn:find_by_key(<<"my proc">>),
  -    %% register
  -    ok = syn:register(<<"my proc">>, Pid),
  -    %% retrieve
  -    Pid = syn:find_by_key(<<"my proc">>),
  -    %% kill process
  -    syn_test_suite_helper:kill_process(Pid),
  -    timer:sleep(100),
  -    %% retrieve
  -    undefined = syn:find_by_key(<<"my proc">>).
  -
   single_node_when_mnesia_is_ram_process_count(_Config) ->
       %% set schema location
       application:set_env(mnesia, schema_location, ram),
  
positive.code:     0 = syn:count(SlaveNodeName),
      0 = rpc:call(SlaveNodeName, syn, count, [CurrentNode]),
      0 = rpc:call(SlaveNodeName, syn, count, [SlaveNodeName]).
  
negative.code:     %% retrieve
      undefined = syn:find_by_key(<<"my proc">>),
      undefined = rpc:call(SlaveNodeName, syn, find_by_key, [<<"my proc">>]).
  
  two_nodes_when_mnesia_is_ram_process_count(Config) ->
      %% get slave
  