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.client.naming.core;
  
  import com.alibaba.nacos.api.PropertyKeyConst;
  import com.alibaba.nacos.api.exception.NacosException;
  import com.alibaba.nacos.client.address.AbstractServerListManager;
  import com.alibaba.nacos.client.address.EndpointServerListProvider;
  import com.alibaba.nacos.client.address.ServerListProvider;
  import com.alibaba.nacos.client.env.NacosClientProperties;
  import com.alibaba.nacos.common.http.HttpClientBeanHolder;
  import com.alibaba.nacos.common.http.HttpRestResult;
  import com.alibaba.nacos.common.http.client.NacosRestTemplate;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.Mock;
  import org.mockito.Mockito;
  import org.mockito.junit.jupiter.MockitoExtension;
  import org.mockito.junit.jupiter.MockitoSettings;
  import org.mockito.quality.Strictness;
  
  import java.lang.reflect.Field;
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  import java.util.List;
  import java.util.Map;
  import java.util.Properties;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertInstanceOf;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.ArgumentMatchers.contains;
  import static org.mockito.ArgumentMatchers.eq;
  
  @ExtendWith(MockitoExtension.class)
  @MockitoSettings(strictness = Strictness.LENIENT)
  class NamingServerListManagerTest {
      
      @Mock
      NacosRestTemplate nacosRestTemplate;
      
      NacosRestTemplate cachedNacosRestTemplate;
      
      NacosClientProperties clientProperties;
      
      HttpRestResult httpRestResult;
      
      NamingServerListManager serverListManager;
      
      @BeforeEach
      void setUp() throws Exception {
          clientProperties = NacosClientProperties.PROTOTYPE.derive();
          Field restMapField = HttpClientBeanHolder.class.getDeclaredField("SINGLETON_REST");
          restMapField.setAccessible(true);
          Map<String, NacosRestTemplate> restMap = (Map<String, NacosRestTemplate>) restMapField.get(null);
          cachedNacosRestTemplate = restMap.get(
                  "com.alibaba.nacos.client.naming.remote.http.NamingHttpClientManager$NamingHttpClientFactory");
          restMap.put("com.alibaba.nacos.client.naming.remote.http.NamingHttpClientManager$NamingHttpClientFactory",
                  nacosRestTemplate);
          httpRestResult = new HttpRestResult<>();
          httpRestResult.setData("127.0.0.1:8848");
          httpRestResult.setCode(200);
          Mockito.when(nacosRestTemplate.get(contains("127.0.0.1"), any(), any(), any())).thenReturn(httpRestResult);
      }
      
      @AfterEach
      void tearDown() throws Exception {
          if (null != cachedNacosRestTemplate) {
              Field restMapField = HttpClientBeanHolder.class.getDeclaredField("SINGLETON_REST");
              restMapField.setAccessible(true);
              Map<String, NacosRestTemplate> restMap = (Map<String, NacosRestTemplate>) restMapField.get(null);
              restMap.put("com.alibaba.nacos.client.naming.remote.http.NamingHttpClientManager$NamingHttpClientFactory",
                      cachedNacosRestTemplate);
          }
          if (null != serverListManager) {
              serverListManager.shutdown();
          }
      }
      
      @Test
      void testConstructWithAddr() throws NacosException {
          Properties properties = new Properties();
          properties.put(PropertyKeyConst.SERVER_ADDR, "127.0.0.1:8848,127.0.0.1:8849");
          serverListManager = new NamingServerListManager(properties);
          serverListManager.start();
          final List<String> serverList = serverListManager.getServerList();
          assertEquals(2, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
          assertEquals("127.0.0.1:8849", serverList.get(1));
      }
      
      @Test
      void testConstructWithAddrTryToRefresh() throws Exception {
          Properties properties = new Properties();
          properties.put(PropertyKeyConst.SERVER_ADDR, "127.0.0.1:8848,127.0.0.1:8849");
          serverListManager = new NamingServerListManager(properties);
          serverListManager.start();
          List<String> serverList = serverListManager.getServerList();
          assertEquals(2, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
          assertEquals("127.0.0.1:8849", serverList.get(1));
          serverList = serverListManager.getServerList();
          assertEquals(2, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
          assertEquals("127.0.0.1:8849", serverList.get(1));
      }
      
      @Test
      void testConstructWithEndpointAndRefresh() throws Exception {
          Properties properties = new Properties();
          properties.put(PropertyKeyConst.ENDPOINT, "127.0.0.1");
          serverListManager = new NamingServerListManager(properties);
          serverListManager.start();
          List<String> serverList = serverListManager.getServerList();
          assertEquals(1, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
          
          httpRestResult.setData("127.0.0.1:8848\n127.0.0.1:8948");
          mockThreadInvoke(serverListManager, true);
          serverList = serverListManager.getServerList();
          assertEquals(2, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
          assertEquals("127.0.0.1:8948", serverList.get(1));
      }
      
      @Test
      void testConstructWithEndpointAndTimedNotNeedRefresh() throws Exception {
          Properties properties = new Properties();
          properties.put(PropertyKeyConst.ENDPOINT, "127.0.0.1");
          serverListManager = new NamingServerListManager(properties);
          serverListManager.start();
          List<String> serverList = serverListManager.getServerList();
          assertEquals(1, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
          
          httpRestResult.setData("127.0.0.1:8848\n127.0.0.1:8948");
          serverList = serverListManager.getServerList();
          assertEquals(1, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
      }
      
      @Test
      void testConstructWithEndpointAndRefreshEmpty() throws Exception {
          Properties properties = new Properties();
          properties.put(PropertyKeyConst.ENDPOINT, "127.0.0.1");
          serverListManager = new NamingServerListManager(properties);
          serverListManager.start();
          List<String> serverList = serverListManager.getServerList();
          assertEquals(1, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
          
          httpRestResult.setData("");
          serverList = serverListManager.getServerList();
          assertEquals(1, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
      }
      
      @Test
      void testConstructWithEndpointAndRefreshException() throws Exception {
          Properties properties = new Properties();
          properties.put(PropertyKeyConst.ENDPOINT, "127.0.0.1");
          serverListManager = new NamingServerListManager(properties);
          serverListManager.start();
          List<String> serverList = serverListManager.getServerList();
          assertEquals(1, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
          
          httpRestResult.setCode(500);
          serverList = serverListManager.getServerList();
          assertEquals(1, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
      }
      
      @Test
      void testConstructWithEndpointWithCustomPathAndName() throws Exception {
          clientProperties.setProperty(PropertyKeyConst.CONTEXT_PATH, "aaa");
          clientProperties.setProperty(PropertyKeyConst.ENDPOINT_CLUSTER_NAME, "bbb");
          clientProperties.setProperty(PropertyKeyConst.ENDPOINT, "127.0.0.1");
          Mockito.reset(nacosRestTemplate);
          Mockito.when(nacosRestTemplate.get(eq("http://127.0.0.1:8080/aaa/bbb"), any(), any(), any()))
                  .thenReturn(httpRestResult);
          serverListManager = new NamingServerListManager(clientProperties, "");
          serverListManager.start();
          List<String> serverList = serverListManager.getServerList();
          assertEquals(1, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
      }
      
      @Test
      void testConstructWithEndpointWithEndpointPathAndName() throws Exception {
          clientProperties.setProperty(PropertyKeyConst.ENDPOINT_CONTEXT_PATH, "aaa");
          clientProperties.setProperty(PropertyKeyConst.ENDPOINT_CLUSTER_NAME, "bbb");
          clientProperties.setProperty(PropertyKeyConst.ENDPOINT, "127.0.0.1");
          Mockito.reset(nacosRestTemplate);
          Mockito.when(nacosRestTemplate.get(eq("http://127.0.0.1:8080/aaa/bbb"), any(), any(), any()))
                  .thenReturn(httpRestResult);
          serverListManager = new NamingServerListManager(clientProperties, "");
          serverListManager.start();
          List<String> serverList = serverListManager.getServerList();
          assertEquals(1, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
      }
      
      @Test
      void testConstructEndpointContextPathPriority() throws Exception {
          clientProperties.setProperty(PropertyKeyConst.ENDPOINT_CONTEXT_PATH, "aaa");
          clientProperties.setProperty(PropertyKeyConst.CONTEXT_PATH, "bbb");
          clientProperties.setProperty(PropertyKeyConst.ENDPOINT_CLUSTER_NAME, "ccc");
          clientProperties.setProperty(PropertyKeyConst.ENDPOINT, "127.0.0.1");
          Mockito.reset(nacosRestTemplate);
          Mockito.when(nacosRestTemplate.get(eq("http://127.0.0.1:8080/aaa/ccc"), any(), any(), any()))
                  .thenReturn(httpRestResult);
          serverListManager = new NamingServerListManager(clientProperties, "");
          serverListManager.start();
          List<String> serverList = serverListManager.getServerList();
          assertEquals(1, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
      }
      
      @Test
      void testConstructEndpointContextPathIsEmpty() throws Exception {
          clientProperties.setProperty(PropertyKeyConst.ENDPOINT_CONTEXT_PATH, "");
          clientProperties.setProperty(PropertyKeyConst.CONTEXT_PATH, "bbb");
          clientProperties.setProperty(PropertyKeyConst.ENDPOINT_CLUSTER_NAME, "ccc");
          clientProperties.setProperty(PropertyKeyConst.ENDPOINT, "127.0.0.1");
          Mockito.reset(nacosRestTemplate);
          Mockito.when(nacosRestTemplate.get(eq("http://127.0.0.1:8080/bbb/ccc"), any(), any(), any()))
                  .thenReturn(httpRestResult);
          serverListManager = new NamingServerListManager(clientProperties, "");
          serverListManager.start();
          List<String> serverList = serverListManager.getServerList();
          assertEquals(1, serverList.size());
          assertEquals("127.0.0.1:8848", serverList.get(0));
      }
      
      @Test
      void testIsDomain() throws Exception {
          Properties properties = new Properties();
          properties.put(PropertyKeyConst.SERVER_ADDR, "127.0.0.1:8848");
          serverListManager = new NamingServerListManager(properties);
          serverListManager.start();
          assertTrue(serverListManager.isDomain());
          assertEquals("127.0.0.1:8848", serverListManager.getNacosDomain());
      }
      
      @Test
      void testGetCurrentServer() throws NacosException {
          Properties properties = new Properties();
          properties.put(PropertyKeyConst.SERVER_ADDR, "127.0.0.1:8848");
          final NamingServerListManager serverListManager = new NamingServerListManager(properties);
          serverListManager.start();
          assertEquals("127.0.0.1:8848", serverListManager.getCurrentServer());
          assertEquals("127.0.0.1:8848", serverListManager.genNextServer());
      }
      
      @Test
      void testShutdown() throws NacosException {
          Properties properties = new Properties();
          properties.put(PropertyKeyConst.SERVER_ADDR, "127.0.0.1:8848");
          final NamingServerListManager serverListManager = new NamingServerListManager(properties);
          serverListManager.start();
          Assertions.assertDoesNotThrow(() -> {
              serverListManager.shutdown();
          });
      }
      
      @Test
      void testStartWithEmptyServerList() {
          Properties properties = new Properties();
          properties.setProperty("EmptyList", "true");
          properties.setProperty("MockTest", "true");
          final NamingServerListManager serverListManager = new NamingServerListManager(properties);
          assertThrows(NacosException.class, serverListManager::start);
      }
      
      private void mockThreadInvoke(NamingServerListManager serverListManager, boolean expectedInvoked)
              throws NoSuchFieldException, IllegalAccessException, NoSuchMethodException, InvocationTargetException {
          Field providerField = AbstractServerListManager.class.getDeclaredField("serverListProvider");
          providerField.setAccessible(true);
          ServerListProvider serverListProvider = (ServerListProvider) providerField.get(serverListManager);
          assertInstanceOf(EndpointServerListProvider.class, serverListProvider);
          Field field = EndpointServerListProvider.class.getDeclaredField("lastServerListRefreshTime");
          field.setAccessible(true);
          field.set(serverListProvider, expectedInvoked ? 0 : System.currentTimeMillis());
          Method method = EndpointServerListProvider.class.getDeclaredMethod("refreshServerListIfNeed");
          method.setAccessible(true);
          method.invoke(serverListProvider);
      }
  }
  