content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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
   *
   *      http://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.nacos.sys.utils;
  
  import com.alibaba.nacos.common.utils.StringUtils;
  import com.alibaba.nacos.sys.env.Constants;
  import com.alibaba.nacos.sys.env.EnvUtil;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.springframework.mock.env.MockEnvironment;
  import org.springframework.test.util.ReflectionTestUtils;
  
  import java.net.InetAddress;
  import java.net.NetworkInterface;
  import java.net.SocketException;
  import java.util.List;
  import java.util.concurrent.TimeUnit;
  
  import static com.alibaba.nacos.sys.env.Constants.NACOS_SERVER_IP;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNotEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  class InetUtilsTest {
      
      @BeforeEach
      void setUp() {
          EnvUtil.setEnvironment(new MockEnvironment());
          System.setProperty(NACOS_SERVER_IP, "1.1.1.1");
          System.setProperty(Constants.AUTO_REFRESH_TIME, "100");
      }
      
      @Test
      void testRefreshIp() throws InterruptedException {
          assertNotEquals("1.1.1.2", InetUtils.getSelfIP());
          
          System.setProperty(NACOS_SERVER_IP, "1.1.1.2");
          TimeUnit.MILLISECONDS.sleep(300L);
          
          assertTrue(StringUtils.equalsIgnoreCase(InetUtils.getSelfIP(), "1.1.1.2"));
          
      }
      
      @AfterEach
      void tearDown() {
          System.clearProperty(NACOS_SERVER_IP);
          System.clearProperty(Constants.AUTO_REFRESH_TIME);
      }
      
      @Test
      void getSelfIP() {
          assertNotNull(InetUtils.getSelfIP());
      }
      
      @Test
      void findFirstNonLoopbackAddress() {
          InetAddress address = InetUtils.findFirstNonLoopbackAddress();
          
          assertNotNull(address);
          assertFalse(address.isLoopbackAddress());
      }
      
      @Test
      void testisUp() throws SocketException {
          NetworkInterface nic = mock(NetworkInterface.class);
          when(nic.isUp()).thenReturn(true);
          assertTrue(InetUtils.isUp(nic));
          
          when(nic.isUp()).thenReturn(false);
          assertFalse(InetUtils.isUp(nic));
          
          when(nic.isUp()).thenThrow(new SocketException());
          assertFalse(InetUtils.isUp(nic));
      }
      
      @Test
      void testIsPreferredAddress() {
          try {
              ReflectionTestUtils.setField(InetUtils.class, "useOnlySiteLocalInterface", true);
              InetAddress inetAddress = mock(InetAddress.class);
              assertFalse((boolean) ReflectionTestUtils.invokeMethod(InetUtils.class, "isPreferredAddress", inetAddress));
              when(inetAddress.isSiteLocalAddress()).thenReturn(true);
              assertTrue((boolean) ReflectionTestUtils.invokeMethod(InetUtils.class, "isPreferredAddress", inetAddress));
          } finally {
              ReflectionTestUtils.setField(InetUtils.class, "useOnlySiteLocalInterface", false);
          }
      }
      
      @Test
      void testIsPreferredAddressForPreferredNetwork() {
          List<String> preferredNetworks = (List<String>) ReflectionTestUtils.getField(InetUtils.class,
                  "PREFERRED_NETWORKS");
          try {
              InetAddress inetAddress = mock(InetAddress.class);
              preferredNetworks.add("192.168.1.*");
              preferredNetworks.add("192.168.2");
              when(inetAddress.getHostAddress()).thenReturn("192.168.1.1");
              assertTrue((boolean) ReflectionTestUtils.invokeMethod(InetUtils.class, "isPreferredAddress", inetAddress));
              when(inetAddress.getHostAddress()).thenReturn("192.168.2.1");
              assertTrue((boolean) ReflectionTestUtils.invokeMethod(InetUtils.class, "isPreferredAddress", inetAddress));
              when(inetAddress.getHostAddress()).thenReturn("10.10.10.10");
              assertFalse((boolean) ReflectionTestUtils.invokeMethod(InetUtils.class, "isPreferredAddress", inetAddress));
          } finally {
              preferredNetworks.clear();
          }
      }
      
      @Test
      void testIgnoreInterface() {
          List<String> ignoreInterfaces = (List<String>) ReflectionTestUtils.getField(InetUtils.class,
                  "IGNORED_INTERFACES");
          try {
              ignoreInterfaces.add("eth.*");
              assertTrue((boolean) ReflectionTestUtils.invokeMethod(InetUtils.class, "ignoreInterface", "eth1"));
              assertFalse((boolean) ReflectionTestUtils.invokeMethod(InetUtils.class, "ignoreInterface", "lo0"));
          } finally {
              ignoreInterfaces.clear();
          }
      }
  
      @Test
      void testGetGrpcListenIp() {
          // 保存原始属性值
          String originalValue = System.getProperty(Constants.NACOS_REMOTE_GRPC_LISTEN_IP);
          try {
              // 测试1: 未设置属性时应返回null
              System.clearProperty(Constants.NACOS_REMOTE_GRPC_LISTEN_IP);
              assertNull(InetUtils.getGrpcListenIp());
  
              // 测试2: 设置无效IP应抛异常
              String invalidIp = "12345";
              System.setProperty(Constants.NACOS_REMOTE_GRPC_LISTEN_IP, invalidIp);
              assertThrows(RuntimeException.class, InetUtils::getGrpcListenIp);
  
              // 测试3: 设置有效IP应正确返回
              String validIp = "192.168.1.1";
              System.setProperty(Constants.NACOS_REMOTE_GRPC_LISTEN_IP, validIp);
              assertEquals(validIp, InetUtils.getGrpcListenIp());
  
              // 测试4: 设置空值应返回null (根据实际需求)
              System.setProperty(Constants.NACOS_REMOTE_GRPC_LISTEN_IP, "");
              assertEquals("", InetUtils.getGrpcListenIp());
          } finally {
              // 恢复原始属性值
              if (originalValue != null) {
                  System.setProperty(Constants.NACOS_REMOTE_GRPC_LISTEN_IP, originalValue);
              } else {
                  System.clearProperty(Constants.NACOS_REMOTE_GRPC_LISTEN_IP);
              }
          }
      }
  
  }
  