### Question:
HibernateUserDAO extends HibernatePersistentObjectDAO<User> implements UserDAO { @Override public boolean store(User user) { return store(user, null); } private  HibernateUserDAO(); static boolean ignoreCaseLogin(); @Override boolean delete(long userId, int code); @Override List<User> findByName(String name); @Override User findByUsername(String username); @Override User findByUsernameIgnoreCase(String username); List<User> findByLikeUsername(String username); @Override List<User> findByUsernameAndName(String username, String name); @Override boolean store(User user); @Override boolean store(User user, UserHistory transaction); boolean validateUser(String username, String password); @Override boolean validateUser(String username); int getPasswordTtl(); @Override boolean isPasswordExpired(String username); @Override int count(Long tenantId); @Override int countGuests(Long tenantId); @Override boolean delete(long userId, UserHistory transaction); UserHistoryDAO getUserHistoryDAO(); void setUserHistoryDAO(UserHistoryDAO userHistoryDAO); void setUserListenerManager(UserListenerManager userListenerManager); UserListenerManager getUserListenerManager(); @Override void initialize(User user); @Override Map<String, Generic> findUserSettings(long userId, String namePrefix); void setGenericDAO(GenericDAO genericDAO); @Override User findAdminUser(String tenantName); void setConfig(ContextProperties config); @Override Set<User> findByGroup(long groupId); @Override User findById(long id); @Override User getUser(String username);  }### Answer:
@Test public void testStore() throws PersistenceException { User user = new User(); user.setUsername("xxx"); user.setDecodedPassword("xxxpwd"); user.setName("claus"); user.setFirstName("valca"); user.setEmail("valca@acme.com"); UserHistory transaction = new UserHistory(); transaction.setEvent(UserEvent.LOGIN.toString()); transaction.setUserId(user.getId()); transaction.setNotified(0); Assert.assertTrue(dao.store(user, transaction)); Assert.assertNotNull(groupDao.findByName(user.getUserGroupName(), 1)); user.addGroup(groupDao.findById(1L)); dao.store(user); User storedUser = dao.findByUsername("xxx"); Assert.assertNotNull(user); Assert.assertEquals(user, storedUser); Assert.assertEquals(2, storedUser.getGroups().size()); Assert.assertNotNull(storedUser.getUserGroup()); Assert.assertEquals(CryptUtil.cryptString("xxxpwd"), storedUser.getPassword()); user = dao.findById(1); user.setDecodedPassword("xxxpwd"); transaction = new UserHistory(); transaction.setEvent(UserEvent.PASSWORDCHANGED.toString()); transaction.setUserId(user.getId()); transaction.setNotified(0); dao.store(user, transaction); user.addGroup(groupDao.findById(1L)); user.addGroup(groupDao.findById(10L)); dao.store(user); user = dao.findById(1); dao.initialize(user); Assert.assertEquals(3, user.getGroups().size()); }