concreteImplementation = createInitializedDfsReferralDataImpl();
    }

    private DfsReferralDataImpl createInitializedDfsReferralDataImpl() {
        // Create a properly initialized instance using combine method
        DfsReferralDataImpl base = new DfsReferralDataImpl();
        DfsReferralData mockData = mock(DfsReferralData.class);
        when(mockData.getServer()).thenReturn("SERVER");

                // Any result is acceptable as long as no unexpected exception
                assertNotNull(result);
            } catch (Exception e) {
                // Expected behavior when components are not fully initialized
                Throwable cause = e.getCause();
                assertNotNull(cause);
            }
        } catch (Exception e) {
            // Test setup exception is acceptable
            assertNotNull(e);

    /** The content type for OSDD response. */
    protected String contentType = "text/xml"; // "application/opensearchdescription+xml"

    /** The OSDD file. */
    protected File osddFile;

    /**
     * Initializes the OSDD helper.
     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {
            logger.debug("Initializing {}", this.getClass().getSimpleName());
        }

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class AbstractListTester<E extends @Nullable Object> extends AbstractCollectionTester<E> {
  /*
   * Previously we had a field named list that was initialized to the value of
   * collection in setUp(), but that caused problems when a tester changed the
   * value of list or collection but not both.
   */
  protected final List<E> getList() {
    return (List<E>) collection;

    void testActivityTracking() {
        long initialTime = channelInfo.getLastActivityTime();

        // Wait a bit and update activity
        try {
            Thread.sleep(10);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }

        channelInfo.updateActivity();
        assertTrue(channelInfo.getLastActivityTime() > initialTime);

    public void testKeyAge() throws InterruptedException {
        String sessionId = "age-test";
        keyManager.storeSessionKey(sessionId, testKey, "AES");

        long initialAge = keyManager.getKeyAge(sessionId);
        assertTrue(initialAge >= 0 && initialAge < 100, "Initial age should be small");

        Thread.sleep(200);

        long laterAge = keyManager.getKeyAge(sessionId);

    /**
     * Default constructor for ProtocolHelper.
     * Initializes the helper with empty protocol arrays that will be populated during init().
     */
    public ProtocolHelper() {
        // Default constructor
    }

    /**
     * Initializes the protocol helper by loading configured protocols from FessConfig

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class AbstractListTester<E extends @Nullable Object> extends AbstractCollectionTester<E> {
  /*
   * Previously we had a field named list that was initialized to the value of
   * collection in setUp(), but that caused problems when a tester changed the
   * value of list or collection but not both.
   */
  protected final List<E> getList() {
    return (List<E>) collection;

    private Name mockName;

    @BeforeEach
    void setUp() {
        MockitoAnnotations.openMocks(this);
    }

    @Test
    void testConstructor() {
        // Test that the constructor correctly initializes questionName and questionType
        NameQueryRequest request = new NameQueryRequest(mockConfig, mockName);

        assertNotNull(request);
        assertEquals(mockName, request.questionName);

        try {
            generator.isTarget(docMap);
        } catch (IllegalStateException e) {
            // Expected when container is not initialized
            assertTrue(e.getMessage().contains("Not initialized"));
        }
    }

    @Test
    public void test_addCondition() {
        // Test adding conditions
        generator = new TestThumbnailGenerator();