if (viewHelper != null) {
            docMap.put(fessConfig.getResponseFieldContentTitle(), viewHelper.getContentTitle(docMap));
            docMap.put(fessConfig.getResponseFieldContentDescription(), viewHelper.getContentDescription(docMap));
            docMap.put(fessConfig.getResponseFieldUrlLink(), viewHelper.getUrlLink(docMap));
            docMap.put(fessConfig.getResponseFieldSitePath(), viewHelper.getSitePath(docMap));
        }

        viewHelper.init();

        Map<String, Object> document = new HashMap<>();
        assertEquals("", viewHelper.getContentDescription(document));

        try {
            document.put("content", "test content");
            String result = viewHelper.getContentDescription(document);
            assertNotNull(result);
        } catch (Exception e) {
            assertTrue(true);
        }
    }

                        docMap.put(fessConfig.getResponseFieldContentTitle(), viewHelper.getContentTitle(docMap));
                        docMap.put(fessConfig.getResponseFieldContentDescription(), viewHelper.getContentDescription(docMap));
                        docMap.put(fessConfig.getResponseFieldUrlLink(), viewHelper.getUrlLink(docMap));
                        docMap.put(fessConfig.getResponseFieldSitePath(), viewHelper.getSitePath(docMap));

     * Returns the first non-blank highlighted field content.
     *
     * @param document the document data map
     * @return the content description with highlighting
     */
    public String getContentDescription(final Map<String, Object> document) {
        for (final String field : highlightedFields) {
            final String text = DocumentUtil.getValue(document, field, String.class);