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;
  
  import org.junit.jupiter.api.Test;
  
  import java.net.InetSocketAddress;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  import static java.util.Arrays.asList;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  public class ClusterTest {
  
      private static final Node[] NODES = new Node[] {
          new Node(0, "localhost", 99),
          new Node(1, "localhost", 100),
          new Node(2, "localhost", 101),
          new Node(11, "localhost", 102)
      };
  
      private static final String TOPIC_A = "topicA";
      private static final String TOPIC_B = "topicB";
      private static final String TOPIC_C = "topicC";
      private static final String TOPIC_D = "topicD";
      private static final String TOPIC_E = "topicE";
  
      @Test
      public void testBootstrap() {
          String ipAddress = "140.211.11.105";
          String hostName = "www.example.com";
          Cluster cluster = Cluster.bootstrap(Arrays.asList(
              new InetSocketAddress(ipAddress, 9002),
              new InetSocketAddress(hostName, 9002)
          ));
          Set<String> expectedHosts = Set.of(ipAddress, hostName);
          Set<String> actualHosts = new HashSet<>();
          for (Node node : cluster.nodes())
              actualHosts.add(node.host());
          assertEquals(expectedHosts, actualHosts);
      }
  
      @Test
      public void testReturnUnmodifiableCollections() {
          List<PartitionInfo> allPartitions = asList(new PartitionInfo(TOPIC_A, 0, NODES[0], NODES, NODES),
              new PartitionInfo(TOPIC_A, 1, null, NODES, NODES),
              new PartitionInfo(TOPIC_A, 2, NODES[2], NODES, NODES),
              new PartitionInfo(TOPIC_B, 0, null, NODES, NODES),
              new PartitionInfo(TOPIC_B, 1, NODES[0], NODES, NODES),
              new PartitionInfo(TOPIC_C, 0, null, NODES, NODES),
              new PartitionInfo(TOPIC_D, 0, NODES[1], NODES, NODES),
              new PartitionInfo(TOPIC_E, 0, NODES[0], NODES, NODES)
          );
          Set<String> unauthorizedTopics = Set.of(TOPIC_C);
          Set<String> invalidTopics = Set.of(TOPIC_D);
          Set<String> internalTopics = Set.of(TOPIC_E);
          Cluster cluster = new Cluster("clusterId", asList(NODES), allPartitions, unauthorizedTopics,
              invalidTopics, internalTopics, NODES[1]);
  
          assertThrows(UnsupportedOperationException.class, () -> cluster.invalidTopics().add("foo"));
          assertThrows(UnsupportedOperationException.class, () -> cluster.internalTopics().add("foo"));
          assertThrows(UnsupportedOperationException.class, () -> cluster.unauthorizedTopics().add("foo"));
          assertThrows(UnsupportedOperationException.class, () -> cluster.topics().add("foo"));
          assertThrows(UnsupportedOperationException.class, () -> cluster.nodes().add(NODES[3]));
          assertThrows(UnsupportedOperationException.class, () -> cluster.partitionsForTopic(TOPIC_A).add(
              new PartitionInfo(TOPIC_A, 3, NODES[0], NODES, NODES)));
          assertThrows(UnsupportedOperationException.class, () -> cluster.availablePartitionsForTopic(TOPIC_B).add(
              new PartitionInfo(TOPIC_B, 2, NODES[0], NODES, NODES)));
          assertThrows(UnsupportedOperationException.class, () -> cluster.partitionsForNode(NODES[1].id()).add(
              new PartitionInfo(TOPIC_B, 2, NODES[1], NODES, NODES)));
      }
  
      @Test
      public void testNotEquals() {
          String clusterId1 = "clusterId1";
          String clusterId2 = "clusterId2";
          Node node0 = new Node(0, "host0", 100);
          Node node1 = new Node(1, "host1", 100);
          Set<PartitionInfo> partitions1 = Collections.singleton(new PartitionInfo("topic1", 0, node0, new Node[]{node0, node1}, new Node[]{node0}));
          Set<PartitionInfo> partitions2 = Collections.singleton(new PartitionInfo("topic2", 0, node0, new Node[]{node1, node0}, new Node[]{node1}));
          Set<String> unauthorizedTopics1 = Collections.singleton("topic1");
          Set<String> unauthorizedTopics2 = Collections.singleton("topic2");
          Set<String> invalidTopics1 = Collections.singleton("topic1");
          Set<String> invalidTopics2 = Collections.singleton("topic2");
          Set<String> internalTopics1 = Collections.singleton("topic3");
          Set<String> internalTopics2 = Collections.singleton("topic4");
          Node controller1 = new Node(2, "host2", 100);
          Node controller2 = new Node(3, "host3", 100); 
          Map<String, Uuid> topicIds1 = Collections.singletonMap("topic1", Uuid.randomUuid());
          Map<String, Uuid> topicIds2 = Collections.singletonMap("topic2", Uuid.randomUuid());
  
          Cluster cluster1 = new Cluster(clusterId1, Collections.singletonList(node0), partitions1,
              unauthorizedTopics1, invalidTopics1, internalTopics1, controller1, topicIds1);
          Cluster differentTopicIds = new Cluster(clusterId1, Collections.singletonList(node0), partitions1,
              unauthorizedTopics1, invalidTopics1, internalTopics1, controller1, topicIds2);
          Cluster differentController = new Cluster(clusterId1, Collections.singletonList(node0), partitions1,
              unauthorizedTopics1, invalidTopics1, internalTopics1, controller2, topicIds1);
          Cluster differentInternalTopics = new Cluster(clusterId1, Collections.singletonList(node0), partitions1,
              unauthorizedTopics1, invalidTopics1, internalTopics2, controller1, topicIds1);
          Cluster differentInvalidTopics = new Cluster(clusterId1, Collections.singletonList(node0), partitions1,
              unauthorizedTopics1, invalidTopics2, internalTopics1, controller1, topicIds1);
          Cluster differentUnauthorizedTopics = new Cluster(clusterId1, Collections.singletonList(node0), partitions1,
              unauthorizedTopics2, invalidTopics1, internalTopics1, controller1, topicIds1);
          Cluster differentPartitions = new Cluster(clusterId1, Collections.singletonList(node0), partitions2,
              unauthorizedTopics1, invalidTopics1, internalTopics1, controller1, topicIds1);
          Cluster differentNodes = new Cluster(clusterId1, Arrays.asList(node0, node1), partitions1,
              unauthorizedTopics1, invalidTopics1, internalTopics1, controller1, topicIds1);
          Cluster differentClusterId = new Cluster(clusterId2, Collections.singletonList(node0), partitions1,
              unauthorizedTopics1, invalidTopics1, internalTopics1, controller1, topicIds1);
  
          assertNotEquals(cluster1, differentTopicIds);
          assertNotEquals(cluster1, differentController);
          assertNotEquals(cluster1, differentInternalTopics);
          assertNotEquals(cluster1, differentInvalidTopics);
          assertNotEquals(cluster1, differentUnauthorizedTopics);
          assertNotEquals(cluster1, differentPartitions);
          assertNotEquals(cluster1, differentNodes);
          assertNotEquals(cluster1, differentClusterId);
      }
  
      @Test
      public void testEquals() {
          String clusterId1 = "clusterId1";
          Node node1 = new Node(1, "host0", 100);
          Node node1duplicate = new Node(1, "host0", 100);
          Set<PartitionInfo> partitions1 = Collections.singleton(new PartitionInfo("topic1", 0, node1, new Node[]{node1}, new Node[]{node1}));
          Set<PartitionInfo> partitions1duplicate = Collections.singleton(new PartitionInfo("topic1", 0, node1duplicate, new Node[]{node1duplicate}, new Node[]{node1duplicate}));
          Set<String> unauthorizedTopics1 = Collections.singleton("topic1");
          Set<String> invalidTopics1 = Collections.singleton("topic1");
          Set<String> internalTopics1 = Collections.singleton("topic3");
          Node controller1 = new Node(2, "host0", 100);
          Node controller1duplicate = new Node(2, "host0", 100);
          Uuid topicId1 = Uuid.randomUuid();
          Map<String, Uuid> topicIds1 = Collections.singletonMap("topic1", topicId1);
          Map<String, Uuid> topicIds1duplicate = Collections.singletonMap("topic1", topicId1);
  
          Cluster cluster1 = new Cluster(clusterId1, Collections.singletonList(node1), partitions1, unauthorizedTopics1,
              invalidTopics1, internalTopics1, controller1, topicIds1);
          Cluster cluster1duplicate = new Cluster(clusterId1, Collections.singletonList(node1duplicate), partitions1duplicate,
              unauthorizedTopics1, invalidTopics1, internalTopics1, controller1duplicate, topicIds1duplicate);
          assertEquals(cluster1, cluster1duplicate);
      }
  }
  