assertNull(user.getBusinessCategory());

        user.setBusinessCategory("Engineering");
        assertEquals("Engineering", user.getBusinessCategory());
    }

    @Test
    public void test_user_departmentNumber() {
        final User user = new User();
        assertNull(user.getDepartmentNumber());

        user.setDepartmentNumber("DEPT001");
        assertEquals("DEPT001", user.getDepartmentNumber());
    }