@Test(expected = KiePMMLException.class)
public void getPredicateUnknown() {

    Predicate unknownPredicate = new Predicate() {
        @Override
        public VisitorAction accept(Visitor visitor) {
            return null;
        }
    };
    KiePMMLPredicateFactory.getPredicate(unknownPredicate, dataDictionary);
}