**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**:

     */
    @Test
    @DisplayName("Test constructor with null file names")
    public void testConstructorWithNullFileNames() {
        // When & Then - should not throw exception during construction
        assertDoesNotThrow(() -> {
            new SmbComRename(config, null, null);
        });
    }

    /**
     * Test with very long file names
     */
    @Test

    public SearchEngineApiManager() {
        super();
        setPathPrefix(ADMIN_SERVER);
    }

    /**
     * Registers this API manager with the web API manager factory.
     * Called automatically after construction via @PostConstruct.
     */
    @PostConstruct
    public void register() {
        if (logger.isInfoEnabled()) {
            logger.info("Loaded {}", this.getClass().getSimpleName());
        }

        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

        assertEquals("remove", ex.getMessage());
    }

    @Test
    @DisplayName("Null tree handle throws NullPointerException during construction")
    void nullTreeHandle() {
        // Arrange
        SmbTreeHandleImpl nullTree = null;

        // Act + Assert
        assertThrows(NullPointerException.class,

  // propagate to the input. Cancellation propagation is fundamentally racy so this is fine.
  //
  // Future versions of the JMM may revise safe construction semantics in such a way that we can
  // safely publish these objects and we won't need this whole discussion.
  // TODO(user,lukes): consider adding volatile to all these fields since in current known JVMs

     * @return the execution result message or summary
     */
    public abstract String execute();

    /**
     * Returns the execution type identifier for this job.
     * This type is used for classpath construction, configuration, and logging purposes.
     *
     * @return the execution type (e.g., "crawler", "suggest", etc.)
     */
    protected abstract String getExecuteType();

    /**

        SmbTreeConnection freshConnection = mock(SmbTreeConnection.class);
        when(freshConnection.acquire()).thenReturn(freshConnection);

        // Should not throw NPE during construction
        SmbTreeHandleImpl handleWithNullLoc = new SmbTreeHandleImpl(null, freshConnection);
        assertNotNull(handleWithNullLoc);

        // But operations that use resourceLoc might fail

    /**
     * Initializes the protocol helper by loading configured protocols from FessConfig
     * and scanning for available protocol handlers in the classpath.
     * This method is called automatically after bean construction.
     */
    @PostConstruct
    public void init() {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        webProtocols = split(fessConfig.getCrawlerWebProtocols(), ",")

        assertEquals('W', asciiBytes[10]);
        assertEquals('z', asciiBytes[11]);
        assertEquals(0, asciiBytes[12]); // null character
    }

    @Test
    @DisplayName("Test field values after construction")
    void testFieldValuesAfterConstruction() {
        netShareEnum = new NetShareEnum(realConfig);

        // Test all important fields
        assertEquals("\\PIPE\\LANMAN", getFieldValue(netShareEnum, "name"));