*
     * This method implements lazy initialization with synchronization to ensure
     * the authenticator is only created once. It configures the authenticator
     * with the appropriate SPNEGO settings and marks initialization as complete.
     *
     * @return The configured SPNEGO authenticator instance
     * @throws SsoLoginException if SPNEGO initialization fails
     */

        }
        dir.delete();
    }

    // Test initialization
    public void test_init() {
        assertNotNull(thumbnailManager.baseDir);
        assertTrue(thumbnailManager.baseDir.exists());
        assertTrue(thumbnailManager.baseDir.isDirectory());
        assertNotNull(thumbnailManager.thumbnailTaskQueue);
    }

    // Test initialization with system property
    public void test_init_withSystemProperty() {

    }

    public void test_constructor_withCause() {
        // Test constructor with cause only
        Throwable cause = new IllegalStateException("Container initialization failed");
        ContainerNotAvailableException exception = new ContainerNotAvailableException(cause);

        assertEquals("Container is not available.", exception.getMessage());

     * Each thread handles crawling for a single data configuration,
     * processing documents and updating the search index.
     *
     * <p>The thread manages:</p>
     * <ul>
     *   <li>Data store initialization and document processing</li>
     *   <li>Index update operations through callbacks</li>
     *   <li>Error handling and failure logging</li>
     *   <li>Cleanup of old documents after successful crawling</li>

    private static FessConfig fessConfig;

    /** List of initialization processes to run after container initialization. */
    private static List<Runnable> initProcesses = new ArrayList<>();

    /**
     * Private constructor to prevent instantiation.
     */
    private ComponentUtil() {
    }

    /**
     * Processes a runnable after container initialization.
     * @param process The process to run after container init.

   * time for AbstractFutureState to potentially use them during class initialization.
   * (AbstractFutureState class initialization can log, and that logging could in theory call into
   * AbstractFuture, which wouldn't yet have had the chance to perform any class initialization of
   * its own.)
   */

  /** A special value to represent {@code null}. */

   * time for AbstractFutureState to potentially use them during class initialization.
   * (AbstractFutureState class initialization can log, and that logging could in theory call into
   * AbstractFuture, which wouldn't yet have had the chance to perform any class initialization of
   * its own.)
   */

  /** A special value to represent {@code null}. */

    public void setUp() throws Exception {
        super.setUp();
        namingConvention = new MockNamingConvention();
        pagerCreator = new PagerCreator(namingConvention);
    }

    // Test constructor initialization
    public void test_constructor() {
        // Verify suffix is set correctly
        assertEquals(PagerCreator.SUFFIX, "Pager");

        // Verify name suffix is set

  /** Table of cells. When non-null, size is a power of 2. */
  transient volatile Cell @Nullable [] cells;

  /**
   * Base value, used mainly when there is no contention, but also as a fallback during table
   * initialization races. Updated via CAS.
   */
  transient volatile long base;

  /** Spinlock (locked via CAS) used when resizing and/or creating Cells. */
  transient volatile int busy;

   * up the necessary in-memory cache information.
   *
   * The initialization time may vary depending on the journal file size and the current actual
   * cache size. The application needs to be aware of calling this function during the
   * initialization phase and preferably in a background worker thread.
   *