public static Criterion matchIPDscp(byte ipDscp) {
        return new IPDscpCriterion(ipDscp);
    }
@Test
    public void testMatchIPDscpMethod() {
        Criterion matchIPDscp = Criteria.matchIPDscp(ipDscp1);
        IPDscpCriterion ipDscpCriterion =
                checkAndConvert(matchIPDscp,
                                Criterion.Type.IP_DSCP,
                                IPDscpCriterion.class);
        assertThat(ipDscpCriterion.ipDscp(), is(equalTo(ipDscp1)));
    }