anchor.diff:                   erlcloud_s3:put_object(Bucket, ?KEY, Block2, AnotherUser)),
       {Bucket, undefined, undefined}.
   
  -calc_storage_stats() ->
  +calc_storage_stats(CSNode) ->
       Begin = rtcs:datetime(),
       %% TODO workaround to #766
       timer:sleep(1000),
  
positive.code:     lager:info("riak-cs-storage batch result: ~s", [Res]),
      ExpectRegexp = "Batch storage calculation started.\n$",
      ?assertMatch({match, _}, re:run(Res, ExpectRegexp)),
      %% TODO ensure storage calculation finished.
      timer:sleep(1000),
      End = rtcs:datetime(),
      {Begin, End}.
  
  
negative.code:     Config = [{riak, rtcs:riak_config([{riak_kv, [{delete_mode, keep}]}])},
                {stanchion, rtcs:stanchion_config()},
                {cs, rtcs:cs_config([{fold_objects_for_list_keys, true}])}],
      {UserConfig, {RiakNodes, CSNodes, _Stanchion}} = rtcs:setup(1, Config),
      {AccessKey2, SecretKey2} = rtcs:create_user(hd(RiakNodes), 1),
      UserConfig2 = rtcs:config(AccessKey2, SecretKey2, rtcs:cs_port(hd(RiakNodes))),
  
  