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

        ViewHelper viewHelper = new ViewHelper();
        viewHelper.init();

        try {
            ViewHelper.TextFragment[] result =
                    viewHelper.createTextFragmentsByHighlight(new org.opensearch.search.fetch.subphase.highlight.HighlightField[0]);
            assertNotNull(result);
            assertEquals(0, result.length);
        } catch (Exception e) {
            assertTrue(true);