@BeforeEach
    public void setUp() {
        ConfigurableApplicationContext context = mock(ConfigurableApplicationContext.class);
        SpringBeanUtils.getInstance().setApplicationContext(context);
        when(context.getBean(ShenyuResult.class)).thenReturn(new DefaultShenyuResult());

        when(selector.getName()).thenReturn("/grpc");
        when(selector.getId()).thenReturn("grpcId");
    }
The Test Case For {@link GrpcPlugin}.
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-rpc/shenyu-plugin-grpc/src/test/java/org/apache/shenyu/plugin/grpc/GrpcPluginTest.java