assertNull(transformer.getThumbnailUrl(responseData, getDocument(data)));

        data = "<img src=\"http://example/foo.jpg\" width=\"x\" height=\"x\">";
        assertNull(transformer.getThumbnailUrl(responseData, getDocument(data)));

        data = "<img src=\"http://example/foo.jpg\" width=\"10\" height=\"100\">";
        assertNull(transformer.getThumbnailUrl(responseData, getDocument(data)));

            public OptionalEntity<Map<String, Object>> getDocument(final String index,
                    final SearchCondition<SearchRequestBuilder> condition) {
                return OptionalEntity.empty();
            }
        };
        ComponentUtil.register(client, "searchEngineClient");

        final Map<String, Object> document = indexingHelper.getDocument(client, "999", new String[] { "title" });

        final ByteArrayInputStream is = new ByteArrayInputStream(html.getBytes("UTF-8"));
        parser.parse(new InputSource(is));
        Node node = parser.getDocument().getFirstChild().getLastChild().getFirstChild();
        return tag.matches(node);
    }

    @Test
    public void test_normalizeQueryLanguages() {
        FessProp.propMap.clear();

            } else {
                docId = null;
            }
            if (StringUtil.isNotBlank(docId)) {
                return searchEngineClient.getDocument(fessConfig.getIndexDocumentUpdateIndex(), builder -> {
                    builder.setQuery(QueryBuilders.termQuery(fessConfig.getIndexFieldDocId(), docId));
                    return true;
                });

            parser.parse(is);
        } catch (final Exception e) {
            throw new CrawlingAccessException("Could not parse " + responseData.getUrl(), e);
        }

        final Document document = parser.getDocument();

        processMetaRobots(responseData, resultData, document);
        processXRobotsTag(responseData, resultData);

        Map<String, Object> dataMap = new LinkedHashMap<>();

     * @param condition the search condition
     * @return an optional containing the document if found
     */
    public OptionalEntity<Map<String, Object>> getDocument(final String index, final SearchCondition<SearchRequestBuilder> condition) {
        return getDocument(index, condition, (response, hit) -> {
            final FessConfig fessConfig = ComponentUtil.getFessConfig();