assertNull(user.getHomePhone());

        user.setHomePhone("098-765-4321");
        assertEquals("098-765-4321", user.getHomePhone());
    }

    @Test
    public void test_user_employeeNumber() {
        final User user = new User();
        assertNull(user.getEmployeeNumber());

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