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.image.node;
  
  import org.apache.kafka.common.DirectoryId;
  import org.apache.kafka.common.Uuid;
  import org.apache.kafka.image.TopicImage;
  import org.apache.kafka.image.node.printer.NodeStringifier;
  import org.apache.kafka.metadata.LeaderRecoveryState;
  import org.apache.kafka.metadata.PartitionRegistration;
  
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.Timeout;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertNull;
  
  
  @Timeout(value = 40)
  public class TopicImageNodeTest {
      private static final TopicImageNode NODE = new TopicImageNode(newTopicImage("topic-image-node-test-topic", Uuid.ZERO_UUID, new PartitionRegistration.Builder().setReplicas(new int[] {2, 3, 4}).
              setDirectories(DirectoryId.migratingArray(3)).
              setIsr(new int[] {2, 3}).setLeader(2).setLeaderRecoveryState(LeaderRecoveryState.RECOVERED).setLeaderEpoch(1).setPartitionEpoch(345).build()));
  
      private static TopicImage newTopicImage(String name, Uuid id, PartitionRegistration... partitions) {
          Map<Integer, PartitionRegistration> partitionMap = new HashMap<>();
          int i = 0;
          for (PartitionRegistration partition : partitions) {
              partitionMap.put(i++, partition);
          }
          return new TopicImage(name, id, partitionMap);
      }
      @Test
      public void testChildNames() {
          assertEquals(List.of("name", "id", "0"), NODE.childNames());
      }
  
      @Test
      public void testNameChild() {
          MetadataNode child = NODE.child("name");
          assertNotNull(child);
          assertEquals(MetadataLeafNode.class, child.getClass());
      }
  
      @Test
      public void testIdChild() {
          MetadataNode child = NODE.child("id");
          assertNotNull(child);
          assertEquals(MetadataLeafNode.class, child.getClass());
      }
  
      @Test
      public void testUnknownChild() {
          assertNull(NODE.child("unknown"));
      }
  
      @Test
      public void testChildPartitionId() {
          MetadataNode child = NODE.child("0");
          assertNotNull(child);
          NodeStringifier stringifier = new NodeStringifier();
          child.print(stringifier);
          assertEquals("PartitionRegistration(replicas=[2, 3, 4], " +
                  "directories=[AAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAA], " +
                  "isr=[2, 3], removingReplicas=[], addingReplicas=[], elr=[], lastKnownElr=[], leader=2, " +
                  "leaderRecoveryState=RECOVERED, leaderEpoch=1, partitionEpoch=345)", stringifier.toString());
      }
  
      @Test
      public void testChildPartitionIdNull() {
          MetadataNode child1 = NODE.child("1");
          MetadataNode child2 = NODE.child("a");
          assertNull(child1);
          assertNull(child2);
      }
  }
  