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.db;
  
  import java.nio.ByteBuffer;
  import java.util.Arrays;
  
  import com.google.common.hash.Hashing;
  import org.junit.Assert;
  import org.junit.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.cassandra.utils.ByteBufferUtil;
  import org.apache.cassandra.utils.Hex;
  
  import static org.apache.cassandra.utils.TimeUUID.Generator.nextTimeUUIDAsBytes;
  import static org.junit.Assert.assertArrayEquals;
  import static org.junit.Assert.assertEquals;
  
  public class DigestTest
  {
      private static final Logger logger = LoggerFactory.getLogger(DigestTest.class);
  
      @Test
      public void hashEmptyBytes() throws Exception {
          Assert.assertArrayEquals(Hex.hexToBytes("d41d8cd98f00b204e9800998ecf8427e"),
                                   Digest.forReadResponse().update(ByteBufferUtil.EMPTY_BYTE_BUFFER).digest());
      }
  
      @Test
      public void hashBytesFromTinyDirectByteBuffer() throws Exception {
          ByteBuffer directBuf = ByteBuffer.allocateDirect(8);
          directBuf.putLong(5L).position(0);
          directBuf.position(0);
          assertArrayEquals(Hex.hexToBytes("aaa07454fa93ed2d37b4c5da9f2f87fd"),
                                           Digest.forReadResponse().update(directBuf).digest());
      }
  
      @Test
      public void hashBytesFromLargerDirectByteBuffer() throws Exception {
          ByteBuffer directBuf = ByteBuffer.allocateDirect(1024);
          for (int i = 0; i < 100; i++) {
              directBuf.putInt(i);
          }
          directBuf.position(0);
          assertArrayEquals(Hex.hexToBytes("daf10ea8894783b1b2618309494cde21"),
                            Digest.forReadResponse().update(directBuf).digest());
      }
  
      @Test
      public void hashBytesFromTinyOnHeapByteBuffer() throws Exception {
          ByteBuffer onHeapBuf = ByteBuffer.allocate(8);
          onHeapBuf.putLong(5L);
          onHeapBuf.position(0);
          assertArrayEquals(Hex.hexToBytes("aaa07454fa93ed2d37b4c5da9f2f87fd"),
                            Digest.forReadResponse().update(onHeapBuf).digest());
      }
  
      @Test
      public void hashBytesFromLargerOnHeapByteBuffer() throws Exception {
          ByteBuffer onHeapBuf = ByteBuffer.allocate(1024);
          for (int i = 0; i < 100; i++) {
              onHeapBuf.putInt(i);
          }
          onHeapBuf.position(0);
          assertArrayEquals(Hex.hexToBytes("daf10ea8894783b1b2618309494cde21"),
                            Digest.forReadResponse().update(onHeapBuf).digest());
      }
  
      @Test
      public void testValidatorDigest()
      {
          Digest[] digests = new Digest[]
                             {
                             Digest.forValidator(),
                             new Digest(Hashing.murmur3_128(1000).newHasher()),
                             new Digest(Hashing.murmur3_128(2000).newHasher())
                             };
          byte [] random = nextTimeUUIDAsBytes();
  
          for (Digest digest : digests)
          {
              digest.updateWithByte((byte) 33)
                    .update(random, 0, random.length)
                    .update(ByteBuffer.wrap(random))
                    .update(random, 0, 3)
                    .updateWithBoolean(false)
                    .updateWithInt(77)
                    .updateWithLong(101);
          }
  
          long len = Byte.BYTES
                     + random.length * 2 // both the byte[] and the ByteBuffer
                     + 3 // 3 bytes from the random byte[]
                     + Byte.BYTES
                     + Integer.BYTES
                     + Long.BYTES;
  
          assertEquals(len, digests[0].inputBytes());
          byte[] h = digests[0].digest();
          assertArrayEquals(digests[1].digest(), Arrays.copyOfRange(h, 0, 16));
          assertArrayEquals(digests[2].digest(), Arrays.copyOfRange(h, 16, 32));
      }
  
  }
  