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());

        Suggester suggester = createSuggester();
        suggester.createIndexIfNothing();

        assertEquals("Empty index should have 0 query words", 0, suggester.getQueryWordsNum());
    }

    @Test
    public void test_settings_returnsNonNull() throws Exception {
        Suggester suggester = createSuggester();