content: /*
   * Copyright 2013-2023 the original author or authors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.alibaba.cloud.nacos.registry;
  
  import java.net.Inet4Address;
  import java.net.Inet6Address;
  import java.net.InetAddress;
  import java.net.NetworkInterface;
  import java.util.Enumeration;
  import java.util.Properties;
  
  import com.alibaba.cloud.nacos.NacosDiscoveryProperties;
  import com.alibaba.cloud.nacos.discovery.NacosDiscoveryClientConfiguration;
  import com.alibaba.nacos.api.NacosFactory;
  import org.junit.jupiter.api.AfterAll;
  import org.junit.jupiter.api.Test;
  import org.mockito.MockedStatic;
  import org.mockito.Mockito;
  
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
  import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.cloud.client.serviceregistry.AutoServiceRegistrationConfiguration;
  import org.springframework.cloud.commons.util.InetUtils;
  import org.springframework.context.annotation.Configuration;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.mockito.ArgumentMatchers.any;
  import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
  
  /**
   * @author xiaojing
   */
  
  @SpringBootTest(
  		classes = NacosAutoServiceRegistrationIpNetworkInterfaceTests.TestConfig.class,
  		properties = { "spring.application.name=myTestService1",
  				"spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848" },
  		webEnvironment = RANDOM_PORT)
  public class NacosAutoServiceRegistrationIpNetworkInterfaceTests {
  
  	@Autowired
  	private NacosRegistration registration;
  
  	@Autowired
  	private NacosAutoServiceRegistration nacosAutoServiceRegistration;
  
  	@Autowired
  	private NacosDiscoveryProperties properties;
  
  	@Autowired
  	private InetUtils inetUtils;
  	private static MockedStatic<NacosFactory> nacosFactoryMockedStatic;
  	static {
  		nacosFactoryMockedStatic = Mockito.mockStatic(NacosFactory.class);
  		nacosFactoryMockedStatic.when(() -> NacosFactory.createNamingService((Properties) any()))
  				.thenReturn(new MockNamingService());
  	}
  	@AfterAll
  	public static void finished() {
  		if (nacosFactoryMockedStatic != null) {
  			nacosFactoryMockedStatic.close();
  		}
  	}
  	@Test
  	public void contextLoads() throws Exception {
  		assertThat(registration).isNotNull();
  		assertThat(properties).isNotNull();
  		assertThat(nacosAutoServiceRegistration).isNotNull();
  
  		checkoutNacosDiscoveryServiceIP();
  	}
  
  	private void checkoutNacosDiscoveryServiceIP() {
  		assertThat(registration.getHost())
  				.isEqualTo(getIPFromNetworkInterface(TestConfig.netWorkInterfaceName));
  	}
  
  	private String getIPFromNetworkInterface(String networkInterface) {
  
  		if (!TestConfig.hasValidNetworkInterface) {
  			return inetUtils.findFirstNonLoopbackHostInfo().getIpAddress();
  		}
  
  		try {
  			NetworkInterface netInterface = NetworkInterface.getByName(networkInterface);
  
  			Enumeration<InetAddress> inetAddress = netInterface.getInetAddresses();
  			while (inetAddress.hasMoreElements()) {
  				InetAddress currentAddress = inetAddress.nextElement();
  				if (currentAddress instanceof Inet4Address || currentAddress instanceof Inet6Address
  						&& !currentAddress.isLoopbackAddress()) {
  					return currentAddress.getHostAddress();
  				}
  			}
  			return networkInterface;
  		}
  		catch (Exception e) {
  			return networkInterface;
  		}
  	}
  
  	@Configuration
  	@EnableAutoConfiguration
  	@ImportAutoConfiguration({ AutoServiceRegistrationConfiguration.class,
  			NacosDiscoveryClientConfiguration.class,
  			NacosServiceRegistryAutoConfiguration.class })
  	public static class TestConfig {
  
  		static boolean hasValidNetworkInterface = false;
  		static String netWorkInterfaceName;
  
  		static {
  
  			try {
  				Enumeration<NetworkInterface> enumeration = NetworkInterface
  						.getNetworkInterfaces();
  				while (enumeration.hasMoreElements() && !hasValidNetworkInterface) {
  					NetworkInterface networkInterface = enumeration.nextElement();
  					Enumeration<InetAddress> inetAddress = networkInterface
  							.getInetAddresses();
  					while (inetAddress.hasMoreElements()) {
  						InetAddress currentAddress = inetAddress.nextElement();
  						if (currentAddress instanceof Inet4Address || currentAddress instanceof Inet6Address
  								&& !currentAddress.isLoopbackAddress()) {
  							hasValidNetworkInterface = true;
  							netWorkInterfaceName = networkInterface.getName();
  							System.setProperty(
  									"spring.cloud.nacos.discovery.network-interface",
  									networkInterface.getName());
  							break;
  						}
  					}
  				}
  
  			}
  			catch (Exception e) {
  
  			}
  		}
  
  	}
  
  }
  