String[] keywords = SuggestUtil.parseQuery(query, field);
        assertNotNull(keywords);
        assertEquals(0, keywords.length); // Should return empty array
    }

    @Test
    public void testGetKeywords() {
        // Test normal query
        String query = "test AND query";
        String[] fields = { "content", "title" };
        List<String> keywords = SuggestUtil.getKeywords(query, fields);