content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.network.protocol.databuffer;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  import alluxio.util.io.BufferUtils;
  
  import io.netty.buffer.ByteBuf;
  import io.netty.channel.FileRegion;
  import org.junit.Before;
  import org.junit.Test;
  
  import java.nio.ByteBuffer;
  
  /**
   * Tests for the {@link NioDataBuffer} class.
   */
  public class NioDataBufferTest {
    private static final int LENGTH = 5;
  
    private ByteBuffer mBuffer = null;
  
    /**
     * Sets up a new {@link ByteBuffer} before a test runs.
     */
    @Before
    public final void before() {
      mBuffer = BufferUtils.getIncreasingByteBuffer(LENGTH);
    }
  
    /**
     * Tests the {@link NioDataBuffer#getNettyOutput()} method.
     */
    @Test
    public void nettyOutput() {
      NioDataBuffer data = new NioDataBuffer(mBuffer, LENGTH);
      Object output = data.getNettyOutput();
      assertTrue(output instanceof ByteBuf || output instanceof FileRegion);
    }
  
    /**
     * Tests the {@link NioDataBuffer#getLength()} method.
     */
    @Test
    public void length() {
      NioDataBuffer data = new NioDataBuffer(mBuffer, LENGTH);
      assertEquals(LENGTH, data.getLength());
    }
  
    /**
     * Tests the {@link NioDataBuffer#getReadOnlyByteBuffer()} method.
     */
    @Test
    public void readOnlyByteBuffer() {
      NioDataBuffer data = new NioDataBuffer(mBuffer, LENGTH);
      ByteBuffer readOnlyBuffer = data.getReadOnlyByteBuffer();
      assertTrue(readOnlyBuffer.isReadOnly());
      assertEquals(mBuffer, readOnlyBuffer);
    }
  }
  