final User user = new User();
        user.setPassword("hashedpassword");
        assertEquals("hashedpassword", user.getPassword());
    }

    @Test
    public void test_user_groups() {
        final User user = new User();
        assertNull(user.getGroups());

        final String[] groups = new String[] { "group1", "group2" };
        user.setGroups(groups);