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.cassandra.dht;
  
  import java.nio.ByteBuffer;
  
  import org.junit.Test;
  
  import static org.quicktheories.QuickTheory.qt;
  import static org.quicktheories.generators.SourceDSL.longs;
  
  public class Murmur3PartitionerTest extends PartitionerTestCase
  {
      public void initPartitioner()
      {
          partitioner = Murmur3Partitioner.instance;
      }
  
      @Override
      protected void midpointMinimumTestCase()
      {
          Token mintoken = partitioner.getMinimumToken();
          assert mintoken.compareTo(partitioner.midpoint(mintoken, mintoken)) != 0;
          assertMidpoint(mintoken, tok("a"), 16);
          assertMidpoint(mintoken, tok("aaa"), 16);
          assertMidpoint(mintoken, mintoken, 62);
          assertMidpoint(tok("a"), mintoken, 16);
      }
  
      protected boolean shouldStopRecursion(Token left, Token right)
      {
          return left.size(right) < Math.scalb(1, -48);
      }
  
      @Test
      public void testSplit()
      {
          assertSplit(tok("a"), tok("b"), 16);
          assertSplit(tok("a"), tok("bbb"), 16);
      }
  
      @Test
      public void testSplitWrapping()
      {
          assertSplit(tok("b"), tok("a"), 16);
          assertSplit(tok("bbb"), tok("a"), 16);
      }
  
      @Test
      public void testSplitExceedMaximumCase()
      {
          Murmur3Partitioner.LongToken left = new Murmur3Partitioner.LongToken(Long.MAX_VALUE - 100);
          assertSplit(left, tok("a"), 16);
      }
  
      @Test
      public void testLongTokenInverse()
      {
          qt().forAll(longs().between(Long.MIN_VALUE + 1, Long.MAX_VALUE))
              .check(token -> {
                  ByteBuffer key = Murmur3Partitioner.LongToken.keyForToken(new Murmur3Partitioner.LongToken(token));
                  return Murmur3Partitioner.instance.getToken(key).token == token;
              });
      }
  }
  
  