suggester.refresh();

        assertEquals(3, suggester.getAllWordsNum());

        SuggestDeleteResponse deleteResponse = suggester.indexer().deleteAll();

        assertNotNull(deleteResponse);
        assertFalse(deleteResponse.hasError());

        suggester.refresh();
        assertEquals(0, suggester.getAllWordsNum());
    }

    @Test

        assertEquals(3, suggester.getAllWordsNum());

        SuggestWriterResult result =
                writer.deleteByQuery(runner.client(), suggester.settings(), suggester.getIndex(), QueryBuilders.matchAllQuery());

        assertNotNull(result);
        assertFalse(result.hasFailure());

        runner.refresh();

        assertEquals(0, suggester.getAllWordsNum());
    }

    @Test

        suggester.refresh();

        assertEquals(2, suggester.getAllWordsNum());
        assertEquals(2, suggester.getDocumentWordsNum());
        assertEquals(1, suggester.getQueryWordsNum());

        suggester.indexer().deleteAll();
        suggester.refresh();
        assertEquals(0, suggester.getAllWordsNum());
        assertEquals(0, suggester.getDocumentWordsNum());

    }

    /**
     * Gets the total number of words in the suggest index.
     *
     * @return The total number of words.
     */
    public long getAllWordsNum() {
        return suggester.getAllWordsNum();
    }

    /**
     * Gets the number of words from documents in the suggest index.
     *
     * @return The number of document words.
     */

     */
    // GET /api/admin/suggest
    @Execute
    public JsonResponse<ApiResult> get$index() {
        final SuggestBody body = new SuggestBody();
        body.totalWordsNum = suggestHelper.getAllWordsNum();
        body.documentWordsNum = suggestHelper.getDocumentWordsNum();
        body.queryWordsNum = suggestHelper.getQueryWordsNum();

        super.setupHtmlData(runtime);
        runtime.registerData("helpLink", systemHelper.getHelpLink(fessConfig.getOnlineHelpNameSuggest()));
        runtime.registerData("totalWordsNum", suggestHelper.getAllWordsNum());
        runtime.registerData("documentWordsNum", suggestHelper.getDocumentWordsNum());
        runtime.registerData("queryWordsNum", suggestHelper.getQueryWordsNum());
    }

    @Override

 *   <li>{@link #getNormalizer()}: Returns the Normalizer instance.</li>
 *   <li>{@link #getIndex()}: Returns the index name.</li>
 *   <li>{@link #getAllWordsNum()}: Returns the total number of words in the suggestion index.</li>
 *   <li>{@link #getDocumentWordsNum()}: Returns the number of document words in the suggestion index.</li>