### Code Standards
- Follow the project's Eclipse formatter configuration
- Add Apache License 2.0 headers to new files: `mvn license:format`
- Maintain comprehensive JavaDoc documentation
- Write thorough unit tests with good coverage
- Follow existing naming conventions and patterns

## 📄 License

    }

    public void test_init() {
        DocumentHelper documentHelper = new DocumentHelper();

        try {
            documentHelper.init();
        } catch (Exception e) {
            fail("init() should not throw an exception: " + e.getMessage());
        }
    }

    public void test_getTitle() {
        DocumentHelper documentHelper = new DocumentHelper();

import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.opensearch.config.exbhv.RelatedContentBhv;
import org.codelibs.fess.opensearch.config.exentity.RelatedContent;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;

public class RelatedContentHelperTest extends UnitFessTestCase {

    private RelatedContentHelper relatedContentHelper;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;

import org.codelibs.fess.entity.DataStoreParams;
import org.codelibs.fess.unit.UnitFessTestCase;

public class IndexUpdateCallbackTest extends UnitFessTestCase {

    public void test_interface_methods() {
        // Test with anonymous implementation

 */
package org.codelibs.fess.util;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

import org.codelibs.fess.Constants;
import org.codelibs.fess.unit.UnitFessTestCase;

public class SystemUtilTest extends UnitFessTestCase {

    public void test_getSearchEngineHttpAddress_null() {
        // Clear the system property to test null case

import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

import jcifs.Configuration;
import jcifs.internal.dtyp.SecurityDescriptor;
import jcifs.internal.util.SMBUtil;

/**
 * Unit tests for NtTransQuerySecurityDescResponse class
 */
class NtTransQuerySecurityDescResponseTest {

    @Mock
    private Configuration mockConfig;

    private NtTransQuerySecurityDescResponse response;

import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.io.FileUtils;
import org.codelibs.core.collection.Maps;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.sai.internal.ir.debug.ObjectSizeCalculator;

import com.google.common.collect.Lists;

public class MemoryUtilTest extends UnitFessTestCase {

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.codelibs.fess.unit.UnitFessTestCase;
import org.dbflute.optional.OptionalEntity;

public class OptionalUtilTest extends UnitFessTestCase {

    public void test_ofNullable_withNonNullString() {
        String testValue = "test string";

import org.codelibs.fess.opensearch.config.exentity.BoostDocumentRule;
import org.codelibs.fess.opensearch.config.exentity.FileConfig;
import org.codelibs.fess.opensearch.config.exentity.WebConfig;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;

public class WebFsIndexHelperTest extends UnitFessTestCase {

    private WebFsIndexHelper webFsIndexHelper;

    @Override

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.helper;

import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;

public class PermissionHelperTest extends UnitFessTestCase {

    public PermissionHelper permissionHelper;

    @Override