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.util;
019
020import java.nio.ByteBuffer;
021import org.apache.hadoop.hbase.HBaseClassTestRule;
022import org.apache.hadoop.hbase.testclassification.MiscTests;
023import org.apache.hadoop.hbase.testclassification.SmallTests;
024import org.junit.Assert;
025import org.junit.ClassRule;
026import org.junit.Test;
027import org.junit.experimental.categories.Category;
028
029@Category({ MiscTests.class, SmallTests.class })
030public class TestSimplePositionedMutableByteRange {
031
032  @ClassRule
033  public static final HBaseClassTestRule CLASS_RULE =
034    HBaseClassTestRule.forClass(TestSimplePositionedMutableByteRange.class);
035
036  @Test
037  public void testPosition() {
038    PositionedByteRange r = new SimplePositionedMutableByteRange(new byte[5], 1, 3);
039
040    // exercise single-byte put
041    r.put(Bytes.toBytes("f")[0]).put(Bytes.toBytes("o")[0]).put(Bytes.toBytes("o")[0]);
042    Assert.assertEquals(3, r.getPosition());
043    Assert.assertArrayEquals(
044      new byte[] { 0, Bytes.toBytes("f")[0], Bytes.toBytes("o")[0], Bytes.toBytes("o")[0], 0 },
045      r.getBytes());
046
047    // exercise multi-byte put
048    r.setPosition(0);
049    r.put(Bytes.toBytes("f")).put(Bytes.toBytes("o")).put(Bytes.toBytes("o"));
050    Assert.assertEquals(3, r.getPosition());
051    Assert.assertArrayEquals(
052      new byte[] { 0, Bytes.toBytes("f")[0], Bytes.toBytes("o")[0], Bytes.toBytes("o")[0], 0 },
053      r.getBytes());
054
055    // exercise single-byte get
056    r.setPosition(0);
057    Assert.assertEquals(Bytes.toBytes("f")[0], r.get());
058    Assert.assertEquals(Bytes.toBytes("o")[0], r.get());
059    Assert.assertEquals(Bytes.toBytes("o")[0], r.get());
060
061    r.setPosition(1);
062    Assert.assertEquals(Bytes.toBytes("o")[0], r.get());
063
064    // exercise multi-byte get
065    r.setPosition(0);
066    byte[] dst = new byte[3];
067    r.get(dst);
068    Assert.assertArrayEquals(Bytes.toBytes("foo"), dst);
069
070    // set position to the end of the range; this should not throw.
071    r.setPosition(3);
072  }
073
074  @Test
075  public void testPutAndGetPrimitiveTypes() {
076    PositionedByteRange pbr = new SimplePositionedMutableByteRange(100);
077    int i1 = 18, i2 = 2;
078    short s1 = 0;
079    long l1 = 1234L;
080    pbr.putInt(i1);
081    pbr.putInt(i2);
082    pbr.putShort(s1);
083    pbr.putLong(l1);
084    pbr.putVLong(0);
085    pbr.putVLong(l1);
086    pbr.putVLong(Long.MAX_VALUE);
087    pbr.putVLong(Long.MIN_VALUE);
088    // rewind
089    pbr.setPosition(0);
090    Assert.assertEquals(i1, pbr.getInt());
091    Assert.assertEquals(i2, pbr.getInt());
092    Assert.assertEquals(s1, pbr.getShort());
093    Assert.assertEquals(l1, pbr.getLong());
094    Assert.assertEquals(0, pbr.getVLong());
095    Assert.assertEquals(l1, pbr.getVLong());
096    Assert.assertEquals(Long.MAX_VALUE, pbr.getVLong());
097    Assert.assertEquals(Long.MIN_VALUE, pbr.getVLong());
098  }
099
100  @Test
101  public void testPutGetAPIsCompareWithBBAPIs() {
102    // confirm that the long/int/short writing is same as BBs
103    PositionedByteRange pbr = new SimplePositionedMutableByteRange(100);
104    int i1 = -234, i2 = 2;
105    short s1 = 0;
106    long l1 = 1234L;
107    pbr.putInt(i1);
108    pbr.putShort(s1);
109    pbr.putInt(i2);
110    pbr.putLong(l1);
111    // rewind
112    pbr.setPosition(0);
113    Assert.assertEquals(i1, pbr.getInt());
114    Assert.assertEquals(s1, pbr.getShort());
115    Assert.assertEquals(i2, pbr.getInt());
116    Assert.assertEquals(l1, pbr.getLong());
117    // Read back using BB APIs
118    ByteBuffer bb = ByteBuffer.wrap(pbr.getBytes());
119    Assert.assertEquals(i1, bb.getInt());
120    Assert.assertEquals(s1, bb.getShort());
121    Assert.assertEquals(i2, bb.getInt());
122    Assert.assertEquals(l1, bb.getLong());
123  }
124}