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.net;
  
  import java.io.EOFException;
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  
  import com.google.common.collect.Lists;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  
  import static org.junit.Assert.*;
  
  public class ChunkedInputPlusTest
  {
      @BeforeClass
      public static void setUp()
      {
          DatabaseDescriptor.clientInitialization();
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void testEmptyIterable()
      {
          ChunkedInputPlus.of(Collections.emptyList());
      }
  
      @Test
      public void testUnderRead() throws IOException
      {
          List<ShareableBytes> chunks = Lists.newArrayList(
              chunk(1, 1), chunk(2, 2), chunk(3, 3)
          );
  
          try (ChunkedInputPlus input = ChunkedInputPlus.of(chunks))
          {
              byte[] readBytes = new byte[5];
              input.readFully(readBytes);
              assertArrayEquals(new byte[] { 1, 2, 2, 3, 3 }, readBytes);
  
              assertFalse(chunks.get(0).hasRemaining());
              assertFalse(chunks.get(1).hasRemaining());
              assertTrue (chunks.get(2).hasRemaining());
  
              assertTrue (chunks.get(0).isReleased());
              assertTrue (chunks.get(1).isReleased());
              assertFalse(chunks.get(2).isReleased());
          }
  
          // close should release the last chunk
          assertTrue(chunks.get(2).isReleased());
      }
  
      @Test
      public void testExactRead() throws IOException
      {
          List<ShareableBytes> chunks = Lists.newArrayList(
              chunk(1, 1), chunk(2, 2), chunk(3, 3)
          );
  
          try (ChunkedInputPlus input = ChunkedInputPlus.of(chunks))
          {
              byte[] readBytes = new byte[6];
              input.readFully(readBytes);
              assertArrayEquals(new byte[] { 1, 2, 2, 3, 3, 3 }, readBytes);
  
              assertFalse(chunks.get(0).hasRemaining());
              assertFalse(chunks.get(1).hasRemaining());
              assertFalse(chunks.get(2).hasRemaining());
  
              assertTrue (chunks.get(0).isReleased());
              assertTrue (chunks.get(1).isReleased());
              assertFalse(chunks.get(2).isReleased());
          }
  
          // close should release the last chunk
          assertTrue(chunks.get(2).isReleased());
      }
  
      @Test
      public void testOverRead() throws IOException
      {
          List<ShareableBytes> chunks = Lists.newArrayList(
              chunk(1, 1), chunk(2, 2), chunk(3, 3)
          );
  
          boolean eofCaught = false;
          try (ChunkedInputPlus input = ChunkedInputPlus.of(chunks))
          {
              byte[] readBytes = new byte[7];
              input.readFully(readBytes);
              assertArrayEquals(new byte[] { 1, 2, 2, 3, 3, 3, 4 }, readBytes);
          }
          catch (EOFException e)
          {
              eofCaught = true;
  
              assertFalse(chunks.get(0).hasRemaining());
              assertFalse(chunks.get(1).hasRemaining());
              assertFalse(chunks.get(2).hasRemaining());
  
              assertTrue (chunks.get(2).isReleased());
              assertTrue (chunks.get(1).isReleased());
              assertTrue (chunks.get(2).isReleased());
          }
          assertTrue(eofCaught);
      }
  
      @Test
      public void testRemainder() throws IOException
      {
          List<ShareableBytes> chunks = Lists.newArrayList(
              chunk(1, 1), chunk(2, 2), chunk(3, 3)
          );
  
          try (ChunkedInputPlus input = ChunkedInputPlus.of(chunks))
          {
              byte[] readBytes = new byte[5];
              input.readFully(readBytes);
              assertArrayEquals(new byte[] { 1, 2, 2, 3, 3 }, readBytes);
  
              assertEquals(1, input.remainder());
  
              assertTrue(chunks.get(0).isReleased());
              assertTrue(chunks.get(1).isReleased());
              assertTrue(chunks.get(2).isReleased()); // should be released by remainder()
          }
      }
  
      private ShareableBytes chunk(int size, int fill)
      {
          ByteBuffer buffer = ByteBuffer.allocate(size);
          Arrays.fill(buffer.array(), (byte) fill);
          return ShareableBytes.wrap(buffer);
      }
  }
  