assertEquals(url, viewHelper.appendHTMLSearchWord(document, url));

        ViewHelper.TextFragment[] fragments = new ViewHelper.TextFragment[2];
        fragments[0] = new ViewHelper.TextFragment(null, "test", null, null);
        fragments[1] = new ViewHelper.TextFragment(null, "example", null, null);
        document.put("text_fragments", fragments);

        String result = viewHelper.appendHTMLSearchWord(document, url);

    // Text Fragment Constants
    // ============================================================

    /** Text fragments feature identifier. */
    public static final String TEXT_FRAGMENTS = "text_fragments";

    /** Text fragment type for query highlighting. */
    public static final String TEXT_FRAGMENT_TYPE_QUERY = "query";

    /** Text fragment type for result highlighting. */

                    }
                });
                if (Constants.TEXT_FRAGMENT_TYPE_HIGHLIGHT.equals(fessConfig.getQueryHighlightTextFragmentType())) {
                    docMap.put(Constants.TEXT_FRAGMENTS,
                            viewHelper.createTextFragmentsByHighlight(highlightFields.values().toArray(HighlightField[]::new)));
                }
            }
        } catch (final Exception e) {