List<String> result = SuggestUtil.getAsList(emptyList);
        assertNotNull(result);
        assertEquals(0, result.size());
    }

    @Test
    public void testGetKeywordsWithEmptyField() {
        // Test with empty field array
        String query = "test query";
        String[] fields = {};
        List<String> keywords = SuggestUtil.getKeywords(query, fields);