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   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.
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  package com.datastax.oss.driver.internal.core.channel;
  
  import static com.datastax.oss.driver.Assertions.assertThat;
  import static com.datastax.oss.driver.Assertions.assertThatStage;
  import static org.mockito.Mockito.when;
  
  import com.datastax.oss.driver.api.core.DefaultProtocolVersion;
  import com.datastax.oss.driver.api.core.config.DefaultDriverOption;
  import com.datastax.oss.driver.internal.core.TestResponses;
  import com.datastax.oss.driver.internal.core.metrics.NoopNodeMetricUpdater;
  import com.datastax.oss.protocol.internal.response.Ready;
  import java.util.concurrent.CompletionStage;
  import org.junit.Test;
  
  public class ChannelFactoryClusterNameTest extends ChannelFactoryTestBase {
  
    @Test
    public void should_set_cluster_name_from_first_connection() {
      // Given
      when(defaultProfile.isDefined(DefaultDriverOption.PROTOCOL_VERSION)).thenReturn(false);
      when(protocolVersionRegistry.highestNonBeta()).thenReturn(DefaultProtocolVersion.V4);
      ChannelFactory factory = newChannelFactory();
  
      // When
      CompletionStage<DriverChannel> channelFuture =
          factory.connect(
              SERVER_ADDRESS, DriverChannelOptions.DEFAULT, NoopNodeMetricUpdater.INSTANCE);
  
      writeInboundFrame(
          readOutboundFrame(), TestResponses.supportedResponse("mock_key", "mock_value"));
      writeInboundFrame(readOutboundFrame(), new Ready());
      writeInboundFrame(readOutboundFrame(), TestResponses.clusterNameResponse("mockClusterName"));
  
      // Then
      assertThatStage(channelFuture).isSuccess();
      assertThat(factory.getClusterName()).isEqualTo("mockClusterName");
    }
  
    @Test
    public void should_check_cluster_name_for_next_connections() throws Throwable {
      // Given
      when(defaultProfile.isDefined(DefaultDriverOption.PROTOCOL_VERSION)).thenReturn(false);
      when(protocolVersionRegistry.highestNonBeta()).thenReturn(DefaultProtocolVersion.V4);
      ChannelFactory factory = newChannelFactory();
  
      // When
      CompletionStage<DriverChannel> channelFuture =
          factory.connect(
              SERVER_ADDRESS, DriverChannelOptions.DEFAULT, NoopNodeMetricUpdater.INSTANCE);
      // open a first connection that will define the cluster name
      writeInboundFrame(
          readOutboundFrame(), TestResponses.supportedResponse("mock_key", "mock_value"));
      writeInboundFrame(readOutboundFrame(), new Ready());
      writeInboundFrame(readOutboundFrame(), TestResponses.clusterNameResponse("mockClusterName"));
      assertThatStage(channelFuture).isSuccess();
      // open a second connection that returns the same cluster name
      channelFuture =
          factory.connect(
              SERVER_ADDRESS, DriverChannelOptions.DEFAULT, NoopNodeMetricUpdater.INSTANCE);
      writeInboundFrame(readOutboundFrame(), new Ready());
      writeInboundFrame(readOutboundFrame(), TestResponses.clusterNameResponse("mockClusterName"));
  
      // Then
      assertThatStage(channelFuture).isSuccess();
  
      // When
      // open a third connection that returns a different cluster name
      channelFuture =
          factory.connect(
              SERVER_ADDRESS, DriverChannelOptions.DEFAULT, NoopNodeMetricUpdater.INSTANCE);
      writeInboundFrame(readOutboundFrame(), new Ready());
      writeInboundFrame(readOutboundFrame(), TestResponses.clusterNameResponse("wrongClusterName"));
  
      // Then
      assertThatStage(channelFuture)
          .isFailed(
              e ->
                  assertThat(e)
                      .isInstanceOf(ClusterNameMismatchException.class)
                      .hasMessageContaining(
                          "reports cluster name 'wrongClusterName' that doesn't match "
                              + "our cluster name 'mockClusterName'."));
    }
  }
  