assertNull(user.getPostOfficeBox());

        user.setPostOfficeBox("PO Box 123");
        assertEquals("PO Box 123", user.getPostOfficeBox());
    }

    @Test
    public void test_user_postalAddress() {
        final User user = new User();
        assertNull(user.getPostalAddress());

        user.setPostalAddress("123 Main St, San Francisco, CA 12345");