anchor.diff:  
   -include("modules/errors.hrl").
   -include_lib("eunit/include/eunit.hrl").
  +
  +-define(CLUSTER_ID, "clusterId").
   
   %%%===================================================================
   %%% Test generators
  
positive.code:             after
                  0 -> {ok, 400, #{}, <<>>}
              end;
          (provider, "/gui-upload/op_panel", post, _Headers, _Body, _Opts) ->
              self() ! gui_uploaded,
              {ok, 200, #{}, <<>>};
          (Auth, URN, Method, Headers, Body, Opts) ->
  
negative.code:     service_oneprovider:set_up_service_in_onezone(),
  
      ?assertMatch({provider, "/clusters/" ++ _Id, patch, _, _Body, _}, pop_request()),
      ?assertMatch({provider, "/opp/" ++ ?CLUSTER_ID ++ "/gui-upload", post, _, _Body, _},
          pop_request()).
  
  
  existing_gui_is_not_uploaded() ->
  