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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.
   */
  
  package org.apache.cassandra.db.streaming;
  
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.Collections;
  
  import org.junit.Assert;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.Util;
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.dht.ByteOrderedPartitioner;
  import org.apache.cassandra.dht.Range;
  import org.apache.cassandra.dht.Token;
  import org.apache.cassandra.io.util.DataInputBuffer;
  import org.apache.cassandra.io.util.DataOutputBuffer;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.locator.RangesAtEndpoint;
  import org.apache.cassandra.locator.Replica;
  import org.apache.cassandra.net.MessagingService;
  import org.apache.cassandra.streaming.StreamRequest;
  import org.apache.cassandra.tcm.ClusterMetadataService;
  import org.apache.cassandra.tcm.StubClusterMetadataService;
  
  public class StreamRequestTest
  {
      private static InetAddressAndPort local;
      private final String ks = "keyspace";
      private final int version = MessagingService.current_version;
  
      @BeforeClass
      public static void setUp() throws Throwable
      {
          DatabaseDescriptor.daemonInitialization();
          ClusterMetadataService.setInstance(StubClusterMetadataService.forTesting());
          local = InetAddressAndPort.getByName("127.0.0.1");
      }
  
      @Test
      public void serializationRoundTrip() throws Throwable
      {
          StreamRequest orig = new StreamRequest(ks,
                                                 atEndpoint(Arrays.asList(range(1, 2), range(3, 4), range(5, 6)),
                                                            Collections.emptyList()),
                                                 atEndpoint(Collections.emptyList(),
                                                            Arrays.asList(range(5, 6), range(7, 8))),
                                                 Arrays.asList("a", "b", "c"));
  
          int expectedSize = (int) StreamRequest.serializer.serializedSize(orig, version);
          try (DataOutputBuffer out = new DataOutputBuffer(expectedSize))
          {
              StreamRequest.serializer.serialize(orig, out, version);
              Assert.assertEquals(expectedSize, out.buffer().limit());
              try (DataInputBuffer in = new DataInputBuffer(out.buffer(), false))
              {
                  StreamRequest decoded = StreamRequest.serializer.deserialize(in, version);
  
                  Assert.assertEquals(orig.keyspace, decoded.keyspace);
                  Util.assertRCEquals(orig.full, decoded.full);
                  Util.assertRCEquals(orig.transientReplicas, decoded.transientReplicas);
                  Assert.assertEquals(orig.columnFamilies, decoded.columnFamilies);
              }
          }
      }
  
      private static RangesAtEndpoint atEndpoint(Collection<Range<Token>> full, Collection<Range<Token>> trans)
      {
          RangesAtEndpoint.Builder builder = RangesAtEndpoint.builder(local);
          for (Range<Token> range : full)
              builder.add(new Replica(local, range, true));
  
          for (Range<Token> range : trans)
              builder.add(new Replica(local, range, false));
  
          return builder.build();
      }
  
      private static Range<Token> range(int l, int r)
      {
          return new Range<>(new ByteOrderedPartitioner.BytesToken(Integer.toString(l).getBytes()),
                             new ByteOrderedPartitioner.BytesToken(Integer.toString(r).getBytes()));
      }
  }
  