@Test
    void testSingleChannelSelection() {
        when(mockChannelManager.getHealthyChannels()).thenReturn(Collections.singletonList(channel1));

        ChannelInfo selected = loadBalancer.selectChannel(mockMessage);
        assertEquals(channel1, selected);
    }

    @Test
    void testNoChannelsAvailable() {
        when(mockChannelManager.getHealthyChannels()).thenReturn(Collections.emptyList());

    }

    protected void registerSpecifiedProperty(String propertyName) { // basically called by modified property registration
        if (__specifiedProperties != null) { // normally false, true if e.g. setting after selected
            __specifiedProperties.addPropertyName(propertyName);
        }
    }

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

    }

    protected void registerSpecifiedProperty(String propertyName) { // basically called by modified property registration
        if (__specifiedProperties != null) { // normally false, true if e.g. setting after selected
            __specifiedProperties.addPropertyName(propertyName);
        }
    }

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

     *
     * @param item the item to update
     */
    public abstract void update(T item);

    /**
     * Deletes a dictionary item.
     *
     * @param item the item to delete
     */
    public abstract void delete(T item);

    /**
     * A paginated list implementation that wraps another list and provides
     * pagination metadata and functionality.
     *

    }

    protected void registerSpecifiedProperty(String propertyName) { // basically called by modified property registration
        if (__specifiedProperties != null) { // normally false, true if e.g. setting after selected
            __specifiedProperties.addPropertyName(propertyName);
        }
    }

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

                        }
                    }));
        } else {
            // do nothing
        }
    }

    /**
     * Deletes a user from the LDAP directory.
     *
     * @param user the user object to delete
     */
    public void delete(final User user) {
        if (!fessConfig.isLdapAdminEnabled(user.getName())) {
            return;
        }

								key="labels.advance_search_filetype_html"
							/></option>
						<option value="pdf" <c:if test="${as.filetype.contains('pdf')}">selected</c:if>><la:message
								key="labels.advance_search_filetype_pdf"
							/></option>
						<option value="word" <c:if test="${as.filetype.contains('word')}">selected</c:if>><la:message

        });
        return redirect(getClass());
    }

    /**
     * Deletes a request header item.
     *
     * @param form the edit form containing the ID of the item to delete
     * @return HTML response redirecting to the list page after deletion
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse delete(final EditForm form) {
        verifyCrudMode(form.crudMode, CrudMode.DETAILS, this::asListHtml);

        });
        return redirect(getClass());
    }

    /**
     * Deletes an existing elevate word entry.
     *
     * @param form edit form containing the elevate word ID to delete
     * @return redirect response to the main elevate word page
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse delete(final EditForm form) {
        verifyCrudMode(form.crudMode, CrudMode.DETAILS, this::asListHtml);

        }
        insertAll(urlFilterList, OpType.INDEX);
        excludeFilterCache.invalidate(sessionId);
    }

    /**
     * Deletes all URL filters for the specified session.
     *
     * @param sessionId The session ID.
     */
    @Override
    public void delete(final String sessionId) {
        deleteBySessionId(sessionId);
        includeFilterCache.invalidate(sessionId);