anchor.diff:      edis_db:process(0),
       #edis_command{cmd = <<"SINTERSTORE">>, args = [?KEY | Keys],
                     group = sets, result_type = multi_bulk}).
  +
  +-spec sismember([binary()]) -> true.
  +sismember([Key|_]) ->
  +  catch edis_db:run(
  +    edis_db:process(0),
  +    #edis_command{cmd = <<"SISMEMBER">>, args = [?KEY, Key], group = sets, result_type = boolean}).
  
positive.code:          init/0, init_per_testcase/1, init_per_round/2,
           quit/0, quit_per_testcase/1, quit_per_round/2]).
  -export([sadd/1, scard/1, sdiff/1, sdiffstore/1, sinter_min/1, sinter_n/1, sinter_m/1,
           sinterstore_min/1, sinterstore_n/1, sinterstore_m/1]).
  
  %% ====================================================================
  %% External functions
  
negative.code: quit_per_testcase(_Function) -> ok.
  
  -spec init_per_round(atom(), [binary()]) -> ok.
  init_per_round(Fun, Keys) when Fun =:= scard;
                                 Fun =:= sismember ->
    sadd(Keys),
    ok;
  init_per_round(Fun, Keys) when Fun =:= sinter_min;
                                 Fun =:= sinterstore_min ->
    edis_db:run(
  