// Test with empty phrase query - should throw InvalidQueryException
        PhraseQuery.Builder builder = new PhraseQuery.Builder();
        PhraseQuery phraseQuery = builder.build();
        QueryContext context = new QueryContext("test", false);

        try {
            queryCommand.convertPhraseQuery(context, phraseQuery, 1.0f);
            fail("Should throw InvalidQueryException for empty phrase query");

    protected QueryBuilder convertPhraseQuery(final QueryContext context, final PhraseQuery phraseQuery, final float boost) {
        final Term[] terms = phraseQuery.getTerms();
        if (terms.length == 0) {
            throw new InvalidQueryException(messages -> messages.addErrorsInvalidQueryUnknown(UserMessages.GLOBAL_PROPERTY_KEY),
                    "Unknown phrase query: " + phraseQuery);
        }

        query = queryParser.createDefaultFilterChain().parse("\"fess codelibs\"");
        assertEquals(PhraseQuery.class, query.getClass());
        assertEquals("_default:fess", ((PhraseQuery) query).getTerms()[0].toString());
        assertEquals("_default:codelibs", ((PhraseQuery) query).getTerms()[1].toString());

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