assertFalse(user.checkPassword(" "));
assertFalse(user.checkPassword("sdfgdsfgsd"));
try {
user.setPassword("pikaron");
assertFalse(user.checkPassword(null));
assertFalse(user.checkPassword(""));
assertTrue(user.checkPassword("pikaron"));
assertFalse(user.checkPassword("pikaron1"));
assertFalse(user.checkPassword("1pikaron"));
} catch (PasswordException e) {