@Test
public void testHashCode() {

    RegistryConfig config1 = new RegistryConfig();
    RegistryConfig config2 = new RegistryConfig();
    config1.setAddress("127.0.0.1:1234").setProtocol("xxx");
    config2.setAddress("127.0.0.1:1234").setProtocol("yyy");
    Assert.assertFalse(config1.hashCode() == config2.hashCode());
    config2.setProtocol("xxx");
    Assert.assertTrue(config1.hashCode() == config2.hashCode());
}