}

    @Test
    @DisplayName("createChannelTransport should fail with null addresses")
    void testCreateChannelTransportWithNullAddresses() {
        // Use reflection to access private method for testing
        Exception exception = assertThrows(Exception.class, () -> {
            java.lang.reflect.Method method =
                    MultiChannelManager.class.getDeclaredMethod("createChannelTransport", InetAddress.class, InetAddress.class);

                        // Create transport for this channel (simplified - in real implementation would be more complex)
                        SmbTransportImpl transport = createChannelTransport(localAddress, serverAddress);

                        ChannelInfo channel = new ChannelInfo(channelId, localAddress, serverAddress, netInterface, transport);
                        channelGroup.addChannel(channel);