### Question:
UserFriendServiceImpl implements UserFriendService { @Override public List<UserFriend> listByUid(Long uid, Integer page, Integer limit) { Integer offset = PageUtils.createOffset(page, limit); return userFriendDao.listByUid(uid, offset, limit); }  @Override List<UserFriend> listByUid(Long uid, Integer page, Integer limit); @Override UserFriend findByUidAndFriendUid(Long uid, Long friendUid); @Override boolean insertUserFriendAll(List<UserFriend> userFriends); @Override boolean updateUserFriend(UserFriend userFriend); @Override boolean deleteByUidAndFriendUid(Long uid, Long friendUid);  }### Answer:
@Test public void listByUid() { }