@BeforeEach
    public void setUp() {
        grpcUpstream = GrpcUpstream.builder().upstreamHost("localhost:38888").upstreamUrl("localhost:38888").status(true).build();
    }
The Test Case For {@link ShenyuResolverHelper}.
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-rpc/shenyu-plugin-grpc/src/test/java/org/apache/shenyu/plugin/grpc/resolver/ShenyuResolverHelperTest.java