assertEquals("_default:fess", clauses.get(0).getQuery().toString());
        assertEquals(Occur.MUST, clauses.get(0).getOccur());
        assertEquals(TermQuery.class, clauses.get(1).getQuery().getClass());
        assertEquals("_default:codelibs", clauses.get(1).getQuery().toString());
        assertEquals(Occur.MUST, clauses.get(1).getOccur());

        query = queryParser.createDefaultFilterChain().parse("fess AND codelibs");

            final QueryBuilder queryBuilder = getQueryProcessor().execute(context, clause.getQuery(), boost);
            if (queryBuilder != null) {
                switch (clause.getOccur()) {
                case MUST:
                    boolQuery.must(queryBuilder);
                    break;
                case SHOULD:
                    boolQuery.should(queryBuilder);
                    break;