assertNull(user.getEmployeeNumber());

        user.setEmployeeNumber("EMP001");
        assertEquals("EMP001", user.getEmployeeNumber());
    }

    @Test
    public void test_user_givenName() {
        final User user = new User();
        assertNull(user.getGivenName());

        user.setGivenName("John");
        assertEquals("John", user.getGivenName());
    }

    @Test