anchor.diff:          , game_creation_bad_cols/1
           , join_game_ok/1
           , join_game_wrong/1
  +        , too_many_joins/1
  +        % , start_game_wrong/1
  +        % , start_game_ok/1
           ]).
   
   -spec all() -> [atom()].
  
positive.code:   [Player1Id] = serpents_games:players(serpents_core:fetch_game(GameId)),
  
    {comment, ""}.
  
negative.code: -spec end_per_testcase(atom(), serpents_test_utils:config()) ->
    serpents_test_utils:config().
  end_per_testcase(JoinGameTest, Config)
    when JoinGameTest == join_game_ok
       ; JoinGameTest == join_game_wrong ->
    lists:filter(
      fun ({K, _}) -> not lists:member(K, [game, player1, player2, player3]) end,
      Config);
  