anchor.diff:  
   
   check_normal_group_permission_test_() ->
  -    FileGuid = <<"file_guid">>,
  +    FileGuid = file_id:pack_guid(<<"file_guid">>, <<"space_id">>),
       FileCtx = file_ctx:new_by_guid(FileGuid),
   
       GroupId1 = <<"gid1">>,
  
positive.code: 
  check_everyone_principal_permission_test_() ->
      OwnerId = <<"id1">>,
      FileGuid = <<"file_guid">>,
      FileMeta = #file_meta{owner = OwnerId},
      FileDoc = #document{key = FileGuid, value = FileMeta},
      FileCtx = file_ctx:new_by_doc(FileDoc, <<"space">>),
  
negative.code:     UserId = <<"UserId">>,
      User = #document{key = UserId, value = #od_user{}},
  
      FileGuid = file_id:pack_guid(<<"file_guid">>, <<"space_id">>),
      FileMeta = #file_meta{owner = UserId},
      FileDoc = #document{key = FileGuid, value = FileMeta},
      FileCtx = file_ctx:new_by_doc(FileDoc, <<"SpaceId">>),
  