ChannelInfo selected = loadBalancer.selectChannel(mockMessage);
        assertEquals(channel2, selected); // Should select less loaded channel
    }

    @Test
    void testWeightedRandomStrategy() {
        loadBalancer.setStrategy(LoadBalancingStrategy.WEIGHTED_RANDOM);
        when(mockChannelManager.getHealthyChannels()).thenReturn(Arrays.asList(channel1, channel2));