} catch (InvalidQueryException e) {
            assertTrue(e.getMessage().contains("Unknown q:"));
        }
    }

    // Test convertBooleanQuery with MUST clause
    public void test_convertBooleanQuery_withMustClause() {
        BooleanQuery.Builder boolQueryBuilder = new BooleanQuery.Builder();
        TermQuery termQuery = new TermQuery(new Term("field", "value"));