content: /*
   * Copyright 1999-2025 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.maintainer.client.address;
  
  import com.alibaba.nacos.api.PropertyKeyConst;
  import com.alibaba.nacos.api.exception.NacosException;
  import com.alibaba.nacos.api.exception.runtime.NacosLoadException;
  import com.alibaba.nacos.client.env.NacosClientProperties;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import java.util.Properties;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  class DefaultServerListManagerTest {
      
      DefaultServerListManager defaultServerListManager;
      
      @BeforeEach
      void setUp() {
          Properties properties = new Properties();
          properties.put(PropertyKeyConst.SERVER_ADDR, "127.0.0.1");
          defaultServerListManager = new DefaultServerListManager(NacosClientProperties.PROTOTYPE.derive(properties));
      }
      
      @Test
      void testStartWithoutAddress() {
          NacosClientProperties properties = NacosClientProperties.PROTOTYPE.derive();
          properties.setProperty("MockTest", "");
          properties.setProperty("EmptyList", "");
          defaultServerListManager = new DefaultServerListManager(properties);
          assertThrows(NacosLoadException.class, () -> defaultServerListManager.start(),
                  "serverList is empty,please check configuration");
      }
      
      @Test
      void genNextServer() throws NacosException {
          defaultServerListManager.start();
          assertEquals("127.0.0.1:8848", defaultServerListManager.genNextServer());
      }
      
      @Test
      void getCurrentServer() throws NacosException {
          defaultServerListManager.start();
          assertEquals("127.0.0.1:8848", defaultServerListManager.getCurrentServer());
      }
  }