content: /**
   * Copyright 2020 Alibaba Group Holding Limited.
   *
   * <p>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
   *
   * <p>http://www.apache.org/licenses/LICENSE-2.0
   *
   * <p>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.graphscope.groot.tests.common.client;
  
  import static org.junit.jupiter.api.Assertions.*;
  
  import com.alibaba.graphscope.groot.common.RoleType;
  import com.alibaba.graphscope.groot.common.config.CommonConfig;
  import com.alibaba.graphscope.groot.common.config.Configs;
  import com.alibaba.graphscope.groot.common.exception.NetworkFailureException;
  import com.alibaba.graphscope.groot.rpc.ChannelManager;
  import com.alibaba.graphscope.groot.rpc.RoleClients;
  import com.alibaba.graphscope.groot.rpc.RpcChannel;
  import com.alibaba.graphscope.groot.rpc.RpcClient;
  import com.alibaba.graphscope.groot.tests.common.rpc.MockFactory;
  
  import org.junit.jupiter.api.Test;
  
  public class RoleClientsTest {
  
      @Test
      void testRoleClients() {
          Configs configs =
                  Configs.newBuilder()
                          .put(CommonConfig.STORE_NODE_COUNT.getKey(), "1")
                          .put(CommonConfig.DISCOVERY_MODE.getKey(), "zookeeper")
                          .build();
          ChannelManager channelManager = new ChannelManager(configs, new MockFactory());
          RoleClients<MockRoleClient> clients =
                  new RoleClients<>(channelManager, RoleType.STORE, MockRoleClient::new);
          channelManager.start();
          assertNotNull(clients.getClient(0));
          assertThrows(NetworkFailureException.class, () -> clients.getClient(1));
          channelManager.stop();
      }
  
      class MockRoleClient extends RpcClient {
  
          public MockRoleClient(RpcChannel channel) {
              super(channel);
          }
      }
  }
  