### Question:
UserDatabaseModelJpa implements UserDatabaseModel, Serializable { @Transactional public int getRegisteredUserCount(Date since) { return userEntityDao.getRegisteredUserCount(since); }  @Transactional boolean addPasswordResetToken(PasswordResetToken token); @Transactional int addUser(User newUser); @Transactional boolean cancelAllPasswordResetTokens(int userId); @Transactional boolean confirmUserRegistration(String email); @Transactional boolean deleteUser(int userId); @Transactional int getRegisteredUserCount(Date since); PasswordResetToken getNewestPasswordResetToken(String email); User getUserByEmail(String email); User getUserByName(String name); User getUserBySocialAccount(SocialAccountDetails details); int getUserIdByEmail(String email); UserPassword getUserPassword(int userId); boolean isEmailRegistered(String email); boolean isUserNameRegistered(String name); @Transactional boolean makeLogInRecord(int userId, boolean logInSuccessfull, String usersIp); @Transactional int saveUserWithSocialAccount(User user, SocialAccountDetails details); @Transactional boolean setUserPassword(int userId, UserPassword password);  }### Answer:
@Test public void testGetRegisteredUserCount() throws DatabaseUnitException, SQLException, Exception { fillDatabase("userDatabaseModelHbnTest/beforeGetRegisteredUserCount.xml"); int result = databaseModel.getRegisteredUserCount(null); assertEquals(2, result); result = databaseModel.getRegisteredUserCount(parseDate("2013-01-02")); assertEquals(1, result); }