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

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

        assertThrows(ChannelLoadBalancer.NoAvailableChannelException.class, () -> loadBalancer.selectChannel(mockMessage));
    }

    @Test

        verify(mockLoadBalancer).selectChannel(mockOperation);
        verify(alternativeChannel).addPendingOperation(mockOperation);
    }

    @Test
    void testFailureWithNoAlternativeChannels() throws Exception {
        failedChannel.addPendingOperation(mockOperation);

     */
    public ChannelInfo selectChannel(String sessionId) {
        ChannelGroup channelGroup = sessionChannels.get(sessionId);
        if (channelGroup == null) {
            log.warn("No channel group found for session {}", sessionId);
            return null;
        }

        ChannelInfo selected = channelGroup.selectChannel(loadBalancingStrategy);

        } catch (NoSuchAlgorithmException e) {
            throw new IOException("SHA-256 not available", e);
        }
    }
    
    public ChannelInfo selectChannel(SMBMessage message) {
        return loadBalancer.selectChannel(message);
    }
    
    public void handleChannelFailure(ChannelInfo channel, Exception error) {
        failover.handleFailure(channel, error);
    }
    

        // For now, just test the empty case
        assertEquals(0, channelManager.getHealthyChannels().size());
    }

    @Test
    void testChannelSelection() {
        try {
            channelManager.selectChannel(mockMessage);
            fail("Should throw exception when no channels available");
        } catch (Exception e) {
            // Expected - no channels available

    /**
     * Select a channel for the given message
     *
     * @param message message to send
     * @return selected channel
     */
    public ChannelInfo selectChannel(CommonServerMessageBlock message) {
        return loadBalancer.selectChannel(message);
    }

    /**
     * Handle channel failure
     *
     * @param channel failed channel
     * @param error error that caused failure
     */

     *
     * @param message SMB message to send
     * @return selected channel
     * @throws NoAvailableChannelException if no healthy channels available
     */
    public ChannelInfo selectChannel(CommonServerMessageBlock message) throws NoAvailableChannelException {
        Collection<ChannelInfo> availableChannels = manager.getHealthyChannels();

        if (availableChannels.isEmpty()) {

        when(mockRequest.getTreeId()).thenReturn(123);

        // Should throw NoAvailableChannelException when no healthy channels
        assertThrows(ChannelLoadBalancer.NoAvailableChannelException.class, () -> loadBalancer.selectChannel(mockRequest),
                "Should throw exception when no healthy channels available");
    }

        // Redistribute to healthy channels
        for (CommonServerMessageBlock op : operationsCopy) {
            try {
                ChannelInfo alternativeChannel = manager.getLoadBalancer().selectChannel(op);
                alternativeChannel.addPendingOperation(op);
                // Operation would be resent on alternative channel
                // For now, skip actual send implementation

     */
    public SmbTransportImpl selectTransport(CommonServerMessageBlockRequest message) {
        if (isUseMultiChannel()) {
            try {
                ChannelInfo channel = channelManager.selectChannel(message);
                return (SmbTransportImpl) channel.getTransport();
            } catch (Exception e) {
                log.debug("Multi-channel selection failed, using primary transport", e);
            }