### Question:
PlayerGames implements Iterable<PlayerGame>, Tickable { public List<String> getRooms(boolean isAll) { return all.stream() .filter(((Predicate<PlayerGame>) pg -> isAll).or(withActive())) .map(PlayerGame::getRoomName) .distinct() .collect(toList()); } PlayerGames(); void onAdd(Consumer<PlayerGame> consumer); void onRemove(Consumer<PlayerGame> consumer); void init(ReadWriteLock lock); void removeCurrent(Player player); void remove(Player player); PlayerGame get(String id); PlayerGame get(GamePlayer player); PlayerGame add(Player player, String roomName, PlayerSave save); boolean isEmpty(); @Override Iterator<PlayerGame> iterator(); List<Player> players(); int size(); void clear(); List<PlayerGame> getAll(Predicate<PlayerGame> predicate); static Predicate<PlayerGame> withType(String gameType); static Predicate<PlayerGame> withAll(); static Predicate<PlayerGame> withRoom(String room); Predicate<PlayerGame> withActive(); List<GameType> getGameTypes(); @Override void tick(); void reloadCurrent(PlayerGame playerGame); void reload(Game game, String roomName, JSONObject save); void reloadAll(boolean shuffle); void reloadAll(boolean shuffle, Predicate<PlayerGame> predicate); List<Player> getPlayers(String gameName); void changeLevel(String playerId, int level); void setLevel(String playerId, JSONObject save); void changeRoom(String playerId, String roomName); PlayerGame get(int index); List<PlayerGame> all(); List<PlayerGame> active(); Stream<PlayerGame> stream(); Multimap<String, Room> rooms(); List<String> getRooms(boolean isAll); static final boolean ALL; static final boolean ACTIVE; }### Answer:
@Test public void testGetRooms() { MultiplayerType type = MultiplayerType.SINGLE; createPlayer("player1", "room1", "game1", type); createPlayer("player2", "room1", "game1", type); createPlayer("player3", "room2", "game2", type); createPlayer("player4", "room2", "game2", type); createPlayer("player5", "room3", "game1", type); setActive("room2", false); assertEquals("[room1, room3]", playerGames.getRooms(ACTIVE).toString()); assertEquals("[room1, room2, room3]", playerGames.getRooms(ALL).toString()); }