@Test
public void testBuild() {

    List<URL> urls = builder.build(new DefaultServiceInstance("127.0.0.1", "test", 8080));
    assertEquals(0, urls.size());
    urls = builder.build(serviceInstance);
    assertEquals(1, urls.size());
    URL url = urls.get(0);
    assertEquals("192.168.0.102", url.getHost());
    assertEquals(20881, url.getPort());
    assertEquals("com.alibaba.cloud.dubbo.service.DubboMetadataService", url.getServiceInterface());
}