anchor.diff:  
   check_group_principal_permission_test_() ->
       SpaceId = <<"space">>,
  -    FileGuid = <<"file_guid">>,
  +    FileGuid = file_id:pack_guid(<<"file_guid">>, <<"space_id">>),
       FileDoc = #document{key = FileGuid, value = #file_meta{}},
       FileCtx = file_ctx:new_by_doc(FileDoc, SpaceId),
   
  
positive.code:     UserId2 = <<"id2">>,
      User2 = #document{key = UserId2, value = #od_user{}},
  
      FileGuid = <<"file_guid">>,
      FileCtx = file_ctx:new_by_guid(FileGuid),
  
      Ace1 = #access_control_entity{
  
negative.code: 
  
  check_normal_group_permission_test_() ->
      FileGuid = file_id:pack_guid(<<"file_guid">>, <<"space_id">>),
      FileCtx = file_ctx:new_by_guid(FileGuid),
  
      GroupId1 = <<"gid1">>,
  