content: /*
   * 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.
   */
  package org.apache.kafka.common.requests;
  
  import org.apache.kafka.common.Cluster;
  import org.apache.kafka.common.Uuid;
  import org.apache.kafka.common.message.MetadataResponseData;
  import org.apache.kafka.common.protocol.ApiKeys;
  import org.apache.kafka.common.protocol.Errors;
  
  import org.junit.jupiter.api.Test;
  
  import static java.util.Collections.emptyList;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  
  public class MetadataResponseTest {
  
      @Test
      void buildClusterTest() {
          Uuid zeroUuid = new Uuid(0L, 0L);
          Uuid randomUuid = Uuid.randomUuid();
          MetadataResponseData.MetadataResponseTopic topicMetadata1 = new MetadataResponseData.MetadataResponseTopic()
                  .setName("topic1")
                  .setErrorCode(Errors.NONE.code())
                  .setPartitions(emptyList())
                  .setIsInternal(false);
          MetadataResponseData.MetadataResponseTopic topicMetadata2 = new MetadataResponseData.MetadataResponseTopic()
                  .setName("topic2")
                  .setErrorCode(Errors.NONE.code())
                  .setTopicId(zeroUuid)
                  .setPartitions(emptyList())
                  .setIsInternal(false);
          MetadataResponseData.MetadataResponseTopic topicMetadata3 = new MetadataResponseData.MetadataResponseTopic()
                  .setName("topic3")
                  .setErrorCode(Errors.NONE.code())
                  .setTopicId(randomUuid)
                  .setPartitions(emptyList())
                  .setIsInternal(false);
  
          MetadataResponseData.MetadataResponseTopicCollection topics =
                  new MetadataResponseData.MetadataResponseTopicCollection();
          topics.add(topicMetadata1);
          topics.add(topicMetadata2);
          topics.add(topicMetadata3);
          MetadataResponse metadataResponse = new MetadataResponse(new MetadataResponseData().setTopics(topics),
                  ApiKeys.METADATA.latestVersion());
          Cluster cluster = metadataResponse.buildCluster();
          assertNull(cluster.topicName(Uuid.ZERO_UUID));
          assertNull(cluster.topicName(zeroUuid));
          assertEquals("topic3", cluster.topicName(randomUuid));
      }
  }
  