* <li>{@link #deleteDocumentWords()} - Delete document words.</li>
 * <li>{@link #deleteQueryWords()} - Delete query words.</li>
 * <li>{@link #indexFromQueryLog(QueryLog)} - Index from a single query log.</li>
 * <li>{@link #indexFromQueryLog(QueryLog[])} - Index from multiple query logs.</li>
 * <li>{@link #indexFromQueryLog(QueryLogReader, int, long)} - Index from query log reader with specified document per request and request interval.</li>

    }

    @Test
    public void test_indexFromEmptyQueryLogs() throws Exception {
        QueryLog[] queryLogs = new QueryLog[0];
        SuggestIndexResponse response = suggester.indexer().indexFromQueryLog(queryLogs);

        assertNotNull(response);
        assertEquals(0, response.getNumberOfInputDocs());
        assertFalse(response.hasError());
    }

    @Test
    @SuppressWarnings("unchecked")

        String field = settings.array().get(SuggestSettings.DefaultKeys.SUPPORTED_FIELDS)[0];

        QueryLog queryLog = new QueryLog(field + ":検索", null);
        SuggestIndexResponse response = suggester.indexer().indexFromQueryLog(queryLog);

        assertNotNull(response);
        assertEquals(1, response.getNumberOfInputDocs());
        assertFalse(response.hasError());
    }

    @Test