try {
                TestIterator.create(tree, parent, "*", null, 0, entry("first"), pages);
            } finally {
                TestIterator.staticThrowOnOpen = false; // Reset flag
            }
        });
        assertEquals("open fail", ex.getMessage());
        verify(tree, times(1)).release(); // closed on constructor failure
    }

    @Test

/**
 * A {@code UnicodeEscaper} that escapes some set of Java characters using a UTF-8 based percent
 * encoding scheme. The set of safe characters (those which remain unescaped) can be specified on
 * construction.
 *
 * <p>This class is primarily used for creating URI escapers in {@link UrlEscapers} but can be used
 * directly if required. While URI escapers impose specific semantics on which characters are

   * that accepts zero or more arguments, all of type {@code String} or {@code Throwable}
   * (preferring constructors with at least one {@code String}) and calling the constructor via
   * reflection. If the exception did not already have a cause, one is set by calling {@link
   * Throwable#initCause(Throwable)} on it. If no such constructor exists, an {@code

**Strategy**: `CrawlerClient`, `Extractor`, `Transformer` - pluggable implementations
**Builder**: `RequestDataBuilder`, `ExtractorBuilder` - fluent construction
**Template Method**: `AbstractCrawlerClient`, `AbstractExtractor` - common logic with overrides
**DI**: LastaFlute container with `@Resource` and XML config

### Core Principles

**Thread Safety**:

    /**
     * Default constructor.
     * Initializes the API manager with the admin server path prefix.
     */
    public SearchEngineApiManager() {
        super();
        setPathPrefix(ADMIN_SERVER);
    }

    /**
     * Registers this API manager with the web API manager factory.
     * Called automatically after construction via @PostConstruct.
     */
    @PostConstruct

        // Tree connection is acquired in the constructor and should return itself
        when(treeConnection.acquire()).thenReturn(treeConnection);
        when(treeConnection.getSession()).thenReturn(session);
        when(session.getTransport()).thenReturn(transport);
        handle = new SmbTreeHandleImpl(resourceLoc, treeConnection);
    }

    @Test
    @DisplayName("Constructor acquires tree connection; getConfig/isConnected delegate")

    /** Flag indicating whether the process has timed out */
    protected boolean processTimeout = false;

    /**
     * Default constructor for ExecJob.
     * Initializes default values for job configuration.
     */
    protected ExecJob() {
        // Default constructor
    }

    /**
     * Executes the job and returns the result as a string.

    protected String[] fileProtocols = StringUtil.EMPTY_STRINGS;

    /**
     * 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

        byte[] actual = NtlmUtil.getNTLMv2Response(key, server, clientChallenge, nanos1601, avPairs);

        // Assert
        assertArrayEquals(expected, actual, "Computed response must match manual construction");
        // Also verify client challenge sits at mac(16) + blob offset 16
        assertArrayEquals(clientChallenge, Arrays.copyOfRange(actual, 16 + 16, 16 + 16 + 8));
    }

    @Test

    /** Timer for managing process destruction. */
    private Timer destoryTimer;

    /**
     * Default constructor for CommandGenerator.
     */
    public CommandGenerator() {
        super();
    }

    /**
     * Initializes the command generator after construction.
     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {