@BeforeEach
    public void setUp() {
        this.grpcPluginDataHandler = new GrpcPluginDataHandler();
        List<DivideUpstream> divideUpstreamList = Stream.of(3)
                .map(weight -> DivideUpstream.builder()
                        .upstreamUrl("localhost:8080" + weight)
                        .build())
                .collect(Collectors.toList());
        this.selectorData = mock(SelectorData.class);
        
        when(selectorData.getHandle()).thenReturn(GsonUtils.getGson().toJson(divideUpstreamList));
    }
The Test Case For {@link GrpcPluginDataHandler}.
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-rpc/shenyu-plugin-grpc/src/test/java/org/apache/shenyu/plugin/grpc/handler/GrpcPluginDataHandlerTest.java