@BeforeEach
    public void setUp() {
        Attributes attributes = SubChannels.createAttributes(1, "ok", "127.0.0.1:3888");
        LoadBalancer.Subchannel subchannel =
                SubChannels.createSubChannel(new UnitTestReadHelper(), mock(EquivalentAddressGroup.class), attributes);
        List<LoadBalancer.Subchannel> list = new LinkedList<>();
        list.add(subchannel);
        randomPicker = new RandomPicker(list);
    }
The Test Case For {@link RandomPicker}.
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-rpc/shenyu-plugin-grpc/src/test/java/org/apache/shenyu/plugin/grpc/loadbalance/picker/RandomPickerTest.java