}

    // Test register with null factory throws exception
    public void test_register_nullFactory() {
        ComponentUtil.register(null, "scriptEngineFactory");

        try {
            testScriptEngine.register();
            fail("Should throw exception when factory is null");
        } catch (NullPointerException e) {
            // Expected exception
        }

    public Suggester build(final Client client, final String id) {
        if (settings == null) {
            if (settingsBuilder == null) {
                settingsBuilder = SuggestSettings.builder();
            }
            settings = settingsBuilder.build(client, id);
        }
        settings.init();

        if (readingConverter == null) {
            readingConverter = SuggestUtil.createDefaultReadingConverter(client, settings);

        assertNull(DocumentUtil.getValue(null, "key", String.class));
        assertNull(DocumentUtil.getValue(null, "key", Integer.class));
    }

    public void test_getValue_with_null_key() {
        Map<String, Object> doc = new HashMap<>();
        doc.put("key", "value");
        assertNull(DocumentUtil.getValue(doc, null, String.class));
        assertNull(DocumentUtil.getValue(doc, null, Integer.class));
    }

        assertEquals(0, response.writeDataWireFormat(null, 0));

        // Read methods return 0 without accessing null buffer
        assertEquals(0, response.readSetupWireFormat(null, 0, 0));
        assertEquals(0, response.readParametersWireFormat(null, 0, 0));
        assertEquals(0, response.readDataWireFormat(null, 0, 0));
    }

    @Test
    @DisplayName("Methods should handle empty buffer")

        initializeFilter();

        // Test request without Authorization header should challenge client
        when(request.getHeader("Authorization")).thenReturn(null);
        when(httpSession.getAttribute("NtlmHttpAuth")).thenReturn(null);

        filter.doFilter(request, response, filterChain);

        verify(response).setStatus(HttpServletResponse.SC_UNAUTHORIZED);

        objAttr.decode(mockNdrBuffer);

        assertEquals(100, objAttr.length);
        assertNull(objAttr.root_directory); // null because _root_directoryp was 0
        assertNull(objAttr.object_name); // Should be null when _object_namep is 0

                assertTrue(true);
                return;
            }
            // Should handle null keywords gracefully
            assertNotNull(functionBuilders);
        } catch (Exception e) {
            // May throw exception due to null handling
            assertNotNull(e);
        }
    }

    public void test_keyMatchHelper_constructor() {

     *
     * @param file The file, must not be {@code null}.
     * @deprecated Use {@link #FileSource(Path)} instead.
     */
    @Deprecated
    public FileSource(File file) {
        this(Objects.requireNonNull(file, "file cannot be null").toPath());
    }

    /**
     * Creates a new source backed by the specified file.
     *
     * @param path The file, must not be {@code null}.
     * @since 4.0.0
     */

        *             If null, the method returns null.
        * @return The SmbAuthentication associated with the path, or null if no
        *         matching authentication is found or if the path is null.
        */
    public SmbAuthentication get(final String path) {
        if (path == null) {
            return null;
        }

        if (StringUtil.isBlank(requestPath)) {
            return null;
        }
        final String virtualHostKey = ComponentUtil.getVirtualHostHelper().getVirtualHostKey();
        if (StringUtil.isBlank(virtualHostKey)) {
            return null;
        }
        final String prefix = "/" + virtualHostKey;
        if (requestPath.startsWith(prefix)) {