// Note: isUseMultiChannel() checks if actual multi-channel is negotiated with server
        // In mock environment, this will be false until we mock successful negotiation

        // Verify load balancer is initialized
        assertNotNull(channelManager.getLoadBalancer());
    }

    @Test
    void testNetworkInterfaceInfo() throws Exception {
        // Test NetworkInterfaceInfo creation and scoring

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

    @Override
    public int load() {
        final List<LabelType> labelTypeList = ComponentUtil.getComponent(LabelTypeService.class).getLabelTypeList();
        buildLabelTypeItems(labelTypeList);

    }

    /**
     * Test constructor with an empty token.
     * Empty token causes readObject() to return null, which leads to NullPointerException.
     */
    @Test
    void testConstructor_EmptyToken() {
        // 1. GIVEN
        byte[] emptyToken = new byte[0];
        Map<Integer, KerberosKey> keys = new HashMap<>();

                    }
                } catch (Exception e) {
                    log.error("Failed to load handle file: " + handleFile, e);
                    Files.deleteIfExists(handleFile);
                }
            }
        } catch (IOException e) {
            log.error("Failed to load persisted handles", e);
        }
    }
    
    public void shutdown() {
        scheduler.shutdown();

                return redirect(ErrorAction.class);
            }
            return response;
        } catch (final Exception e) {
            logger.warn("Failed to load: {}", doc, e);
            saveError(messages -> messages.addErrorsNotLoadFromServer(GLOBAL, targetUrl));
            return redirect(ErrorAction.class);
        }
    }

    /**

            }
            return UserDictionary.open(new StringReader(sb.toString()));
        } catch (IOException e) {
            throw new OpenSearchException("failed to load kuromoji user dictionary", e);
        }
    }

    public static JapaneseTokenizer.Mode getMode(Settings settings) {
        JapaneseTokenizer.Mode mode = JapaneseTokenizer.DEFAULT_MODE;

        assertEquals("smb://server/share/", locator.handleDFSReferral(null, ""));
        verify(locator).handleDFSReferral(null, "");
        verifyNoMoreInteractions(locator);
    }

    // Invalid input: null reqPath leads to NPE from implementation
    @Test
    @DisplayName("handleDFSReferral throws NPE on null reqPath")
    void handleDfsReferralNullPathThrows() {

    //                                                                        ============

    /**
     * Saves informational messages to the session.
     * The messages will be displayed to the user on the next page load.
     *
     * @param validationMessagesLambda a lambda function to configure the messages
     */
    protected void saveInfo(final VaMessenger<FessMessages> validationMessagesLambda) {

    }

    /**
     * Clear all pending operations
     */
    public void clearPendingOperations() {
        pendingOperations.clear();
    }

    /**
     * Calculate channel score for load balancing (higher is better)
     *
     * @return channel score
     */
    public int getScore() {
        int score = 100;

        // Adjust based on state
        if (state == ChannelState.ACTIVE)

     *
     * @param <K> the key type of {@link ConcurrentHashMap}
     * @param <V> the value type of {@link ConcurrentHashMap}
     * @param initialCapacity the initial capacity
     * @param loadFactor the load factor threshold for resizing
     * @param concurrencyLevel the estimated number of threads for concurrent updates
     * @return a new instance of {@link ConcurrentHashMap}