001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.io;
019
020import static org.junit.jupiter.api.Assertions.assertEquals;
021
022import java.io.ByteArrayOutputStream;
023import java.io.DataInputStream;
024import java.io.DataOutputStream;
025import java.nio.ByteBuffer;
026import org.apache.hadoop.hbase.nio.MultiByteBuff;
027import org.apache.hadoop.hbase.testclassification.IOTests;
028import org.apache.hadoop.hbase.testclassification.SmallTests;
029import org.apache.hadoop.hbase.util.Bytes;
030import org.junit.jupiter.api.Tag;
031import org.junit.jupiter.api.Test;
032
033@Tag(IOTests.TAG)
034@Tag(SmallTests.TAG)
035public class TestMultiByteBuffInputStream {
036
037  @Test
038  public void testReads() throws Exception {
039    ByteArrayOutputStream bos = new ByteArrayOutputStream(100);
040    DataOutputStream dos = new DataOutputStream(bos);
041    String s = "test";
042    int i = 128;
043    dos.write(1);
044    dos.writeInt(i);
045    dos.writeBytes(s);
046    dos.writeLong(12345L);
047    dos.writeShort(2);
048    dos.flush();
049    ByteBuffer bb = ByteBuffer.wrap(bos.toByteArray());
050
051    // bbis contains 19 bytes
052    // 1 byte, 4 bytes int, 4 bytes string, 8 bytes long and 2 bytes short
053    ByteBuffInputStream bbis = new ByteBuffInputStream(new MultiByteBuff(bb));
054    assertEquals(15 + s.length(), bbis.available());
055    assertEquals(1, bbis.read());
056    byte[] ib = new byte[4];
057    bbis.read(ib);
058    assertEquals(i, Bytes.toInt(ib));
059    byte[] sb = new byte[s.length()];
060    bbis.read(sb);
061    assertEquals(s, Bytes.toString(sb));
062    byte[] lb = new byte[8];
063    bbis.read(lb);
064    assertEquals(12345, Bytes.toLong(lb));
065    assertEquals(2, bbis.available());
066    ib = new byte[4];
067    int read = bbis.read(ib, 0, ib.length);
068    // We dont have 4 bytes remainig but only 2. So onlt those should be returned back
069    assertEquals(2, read);
070    assertEquals(2, Bytes.toShort(ib));
071    assertEquals(0, bbis.available());
072    // At end. The read() should return -1
073    assertEquals(-1, bbis.read());
074    bbis.close();
075
076    bb = ByteBuffer.wrap(bos.toByteArray());
077    bbis = new ByteBuffInputStream(new MultiByteBuff(bb));
078    DataInputStream dis = new DataInputStream(bbis);
079    dis.read();
080    assertEquals(i, dis.readInt());
081    dis.close();
082  }
083}