* @param dataMap additional data map (not currently used)
     * @return the normalized title, or empty string if title is null
     */
    public String getTitle(final ResponseData responseData, final String title, final Map<String, Object> dataMap) {
        if (title == null) {
            return StringUtil.EMPTY; // empty
        }

        final int[] spaceChars = getSpaceChars();

        } catch (InvalidQueryException e) {
            assertTrue(e.getMessage().contains("Unknown q:"));
        }
    }

    @Test
    public void test_convertPhraseQuery_emptyTerms() {
        // Test with empty phrase query - should throw InvalidQueryException
        PhraseQuery.Builder builder = new PhraseQuery.Builder();
        PhraseQuery phraseQuery = builder.build();
        QueryContext context = new QueryContext("test", false);

    @Test
    public void test_setAndGetDocumentItems() {
        // Test with null
        searchRenderData.setDocumentItems(null);
        assertNull(searchRenderData.getDocumentItems());

        // Test with empty list
        List<Map<String, Object>> emptyList = new ArrayList<>();
        searchRenderData.setDocumentItems(emptyList);
        assertEquals(emptyList, searchRenderData.getDocumentItems());

                               aria-controls="listSearchForm"><i class="fas fa-search" aria-hidden="true"></i></a>
                            <div class="collapse <c:if test="${!empty regex || !empty replacement}">show</c:if>" id="listSearchForm">
                                <la:form action="/admin/pathmap/">
                                    <div class="form-group row">

     * @return An optional entity containing the stopwords file, or empty if not found.
     */
    public OptionalEntity<StopwordsFile> getStopwordsFile(final String dictId) {
        return dictionaryManager.getDictionaryFile(dictId)
                .filter(StopwordsFile.class::isInstance)
                .map(file -> OptionalEntity.of((StopwordsFile) file))
                .orElse(OptionalEntity.empty());
    }

    /**

     * @return An optional entity containing the synonym file, or empty if not found.
     */
    public OptionalEntity<SynonymFile> getSynonymFile(final String dictId) {
        return dictionaryManager.getDictionaryFile(dictId)
                .filter(SynonymFile.class::isInstance)
                .map(file -> OptionalEntity.of((SynonymFile) file))
                .orElse(OptionalEntity.empty());
    }

    /**

            // If suppression is disabled, getSuppressed should return empty array
            assertEquals(0, exception.getSuppressed().length);
        } catch (Exception e) {
            // If an exception is thrown when trying to add suppressed, that's also valid
            // since suppression is disabled
        }

        // Stack trace should be empty since writableStackTrace is false

     *
     * @return the application type string, or empty string if not set
     */
    public static String getAppType() {
        final String appType = System.getenv(FESS_APP_TYPE);
        if (StringUtil.isNotBlank(appType)) {
            return appType;
        }
        return StringUtil.EMPTY;
    }

    /**

					arg3="${f:h(currentEndRecordNumber)}" />
			</c:if>
			<c:if test="${execTime!=null}">
				<la:message key="labels.search_result_time" arg0="${f:h(execTime)}" />
			</c:if>
		</p>
		<c:if test="${! empty sdh }">
		<p>
			<la:message key="labels.similar_doc_result_status" />
		</p>
		</c:if>
	</div>
</div>
<c:if test="${partialResults}">
	<div class="alert alert-warning">
		<p>

            assertEquals(0, map.size());
        }

        // Test with empty values
        configParameters = "config.empty=\nfield.xpath.empty=";
        result = ParameterUtil.createConfigParameterMap(configParameters);
        assertEquals(1, result.get(ConfigName.CONFIG).size());
        assertEquals("", result.get(ConfigName.CONFIG).get("empty"));
        assertEquals(1, result.get(ConfigName.XPATH).size());