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   * "License"); you may not use this file except in compliance
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   *
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  package org.apache.cassandra.tcm.ownership;
  
  import java.util.Collections;
  
  import org.junit.Test;
  
  import org.apache.cassandra.dht.Murmur3Partitioner;
  import org.apache.cassandra.dht.Range;
  import org.apache.cassandra.dht.Token;
  import org.apache.cassandra.locator.EndpointsForRange;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.tcm.membership.Directory;
  import org.apache.cassandra.tcm.membership.Location;
  import org.apache.cassandra.tcm.membership.NodeAddresses;
  import org.apache.cassandra.tcm.membership.NodeId;
  
  import static org.apache.cassandra.locator.Replica.fullReplica;
  import static org.apache.cassandra.tcm.membership.MembershipUtils.endpoint;
  import static org.apache.cassandra.tcm.ownership.OwnershipUtils.token;
  import static org.junit.Assert.assertEquals;
  
  public class PrimaryRangeComparatorTest
  {
      @Test
      public void tokenOwnerSortsFirst()
      {
          Location location = new Location("dc1", "rack1");
          Directory directory = new Directory();
          TokenMap tokenMap = new TokenMap(Murmur3Partitioner.instance);
  
          InetAddressAndPort ep1 = endpoint(1);
          directory = directory.with(new NodeAddresses(endpoint(1)), location);
          NodeId id1 = directory.peerId(ep1);
          tokenMap = tokenMap.assignTokens(id1, Collections.singleton(token(100)));
  
          InetAddressAndPort ep2 = endpoint(2);
          directory = directory.with(new NodeAddresses(endpoint(2)), location);
          NodeId id2 = directory.peerId(ep2);
          tokenMap = tokenMap.assignTokens(id2, Collections.singleton(token(200)));
  
          InetAddressAndPort ep3 = endpoint(3);
          directory = directory.with(new NodeAddresses(endpoint(3)), location);
          NodeId id3 = directory.peerId(ep3);
          tokenMap = tokenMap.assignTokens(id3, Collections.singleton(token(300)));
  
          Range<Token> range = new Range<>(token(100), token(200));
          EndpointsForRange replicas = EndpointsForRange.builder(range)
                                                        .add(fullReplica(ep1, range))
                                                        .add(fullReplica(ep2, range))
                                                        .add(fullReplica(ep3, range))
                                                        .build();
          PrimaryRangeComparator c = new PrimaryRangeComparator(tokenMap, directory);
          EndpointsForRange sorted = replicas.sorted(c);
          assertEquals(ep2, sorted.iterator().next().endpoint());
      }
  
      @Test
      public void whenWraparoundLowestTokenOwnerSortsFirst()
      {
          Location location = new Location("dc1", "rack1");
          Directory directory = new Directory();
          TokenMap tokenMap = new TokenMap(Murmur3Partitioner.instance);
  
          InetAddressAndPort ep1 = endpoint(1);
          directory = directory.with(new NodeAddresses(endpoint(1)), location);
          NodeId id1 = directory.peerId(ep1);
          tokenMap = tokenMap.assignTokens(id1, Collections.singleton(token(100)));
  
          InetAddressAndPort ep2 = endpoint(2);
          directory = directory.with(new NodeAddresses(endpoint(2)), location);
          NodeId id2 = directory.peerId(ep2);
          tokenMap = tokenMap.assignTokens(id2, Collections.singleton(token(200)));
  
          InetAddressAndPort ep3 = endpoint(3);
          directory = directory.with(new NodeAddresses(endpoint(3)), location);
          NodeId id3 = directory.peerId(ep3);
          tokenMap = tokenMap.assignTokens(id3, Collections.singleton(token(300)));
  
          Range<Token> range = new Range<>(token(300), Murmur3Partitioner.MINIMUM);
          EndpointsForRange replicas = EndpointsForRange.builder(range)
                                                        .add(fullReplica(ep1, range))
                                                        .add(fullReplica(ep2, range))
                                                        .add(fullReplica(ep3, range))
                                                        .build();
          PrimaryRangeComparator c = new PrimaryRangeComparator(tokenMap, directory);
          EndpointsForRange sorted = replicas.sorted(c);
          assertEquals(ep1, sorted.iterator().next().endpoint());
      }
  }
  