@Test
	public void testGetServerAddr() {
		assertThat(properties.getServerAddr()).isEqualTo("321.321.321.321:8848");
	}
@author <a href="mailto:lyuzb@lyuzb.com">lyuzb</a>
spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-discovery/src/test/java/com/alibaba/cloud/nacos/NacosDiscoveryPropertiesServerAddressBothLevelTests.java