### Question:
PlayerGamesView { public Map<String, String> getReadableNames() { return service.all().stream() .collect(toMap(pg -> pg.getPlayer().getId(), pg -> pg.getPlayer().getNotNullReadableName())); }  Map<String, GameData> getGamesDataMap(); Map<String, List<String>> getGroupsMap(); List<List<String>> getGroupsByRooms(); List<List<String>> getGroupsByField(); Map<String, Object> getScores(); List<PScoresOf> getScoresForGame(String gameName); List<PScoresOf> getScoresForRoom(String roomName); Map<String, String> getReadableNames();  }### Answer:
@Test public void testGetReadableNames() { givenUsersInSameGroup(); Map<String, String> names = playerGamesView.getReadableNames(); assertEquals("{user1=readable_user1, user2=readable_user2, " + "user3=readable_user3, user4=readable_user4}", sortKeys(names).toString()); }