//                                                                        Empty String
    //                                                                        ============
    protected String convertEmptyToNull(String value) {
        return (value != null && value.length() == 0) ? null : value;
    }

    // ===================================================================================

    @Test
    public void test_user_surnameDefaultsToName() {
        final User user = new User();
        user.setName("testuser");
        assertNull(user.getSurname());

        // When surname is blank, convertEmptyToNull converts it to null
        user.setSurname("");
        assertNull(user.getSurname());

        user.setSurname(user.getName());
        assertEquals("testuser", user.getSurname());
    }

    @Test