anchor.diff:      ?assertMatch(true, is_gui_upload_registered(UserId, FileGuid, Worker)),
   
       % but if upload is not resumed or finished before INACTIVITY_PERIOD then file should be deleted
  -    timer:sleep(timer:seconds(100)),
  -    ?assertMatch(false, is_gui_upload_registered(UserId, FileGuid, Worker), ?ATTEMPTS),
  +    ?assertMatch(false, is_gui_upload_registered(UserId, FileGuid, Worker), 100),
       ?assertMatch({error, ?ENOENT}, lfm_proxy:stat(Worker, UserSessId, {guid, FileGuid}), ?ATTEMPTS).
  -
  -
  -gui_finished_upload_file_should_be_left_intact(Config) ->
  -    UserId = api_test_env:get_user_id(user3, Config),
  -    UserSessId = api_test_env:get_user_session_id(user3, p1, Config),
  -    [Worker] = api_test_env:get_provider_nodes(p1, Config),
  -
  -    {ok, FileGuid} = lfm_proxy:create(Worker, UserSessId, ?FILE_PATH, ?DEFAULT_FILE_MODE),
  -    ?assertMatch({ok, _}, lfm_proxy:stat(Worker, UserSessId, {guid, FileGuid})),
  -
  -    ?assertMatch({ok, _}, initialize_gui_upload(UserId, UserSessId, FileGuid, Worker)),
  -    ?assertMatch(true, is_gui_upload_registered(UserId, FileGuid, Worker)),
  -
  -    % file being uploaded shouldn't be deleted after only 30s of inactivity
  -    timer:sleep(timer:seconds(30)),
  -    ?assertMatch(true, is_gui_upload_registered(UserId, FileGuid, Worker)),
  -    ?assertMatch({ok, _}, lfm_proxy:stat(Worker, UserSessId, {guid, FileGuid})),
  -
  -    % uploaded files shouldn't be deleted automatically after INACTIVITY_PERIOD
  -    ?assertMatch({ok, _}, finalize_gui_upload(UserId, UserSessId, FileGuid, Worker)),
  -    ?assertMatch(false, is_gui_upload_registered(UserId, FileGuid, Worker), ?ATTEMPTS),
  -
  -    timer:sleep(timer:seconds(100)),
  -
  -    ?assertMatch(false, is_gui_upload_registered(UserId, FileGuid, Worker), ?ATTEMPTS),
  -    ?assertMatch({ok, _}, lfm_proxy:stat(Worker, UserSessId, {guid, FileGuid})).
   
   
   gui_upload_with_time_warps_test(Config) ->
  
positive.code:     gui_not_registered_upload_should_fail,
      gui_upload_test,
      gui_stale_upload_file_should_be_deleted,
      gui_finished_upload_file_should_be_left_intact,
      gui_upload_with_time_warps_test
  ].
  
  
negative.code:     gui_not_registered_upload_should_fail/1,
      gui_upload_test/1,
      gui_stale_upload_file_should_be_deleted/1,
      gui_upload_with_time_warps_test/1
  ]).
  
  