suggester.indexer().index(items);
        suggester.refresh();

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

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

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

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

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

    @Test
    public void test_deleteDocumentWords() throws Exception {

    }

    /**
     * Gets the number of words from queries in the suggest index.
     *
     * @return The number of query words.
     */
    public long getQueryWordsNum() {
        return suggester.getQueryWordsNum();
    }

    /**
     * Deletes all words from the suggest index.
     *
     * @return true if the operation was successful, false otherwise.
     */

 *   <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>
 *   <li>{@link #getQueryWordsNum()}: Returns the number of query words in the suggestion index.</li>
 * </ul>
 *
 * <p>Protected Methods:
 * <ul>
 *   <li>{@link #createDefaultIndexer()}: Creates a default SuggestIndexer instance.</li>
 * </ul>