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])
042     .put(Bytes.toBytes("o")[0])
043     .put(Bytes.toBytes("o")[0]);
044    Assert.assertEquals(3, r.getPosition());
045    Assert.assertArrayEquals(
046      new byte[] { 0, Bytes.toBytes("f")[0], Bytes.toBytes("o")[0], Bytes.toBytes("o")[0], 0 },
047      r.getBytes());
048
049    // exercise multi-byte put
050    r.setPosition(0);
051    r.put(Bytes.toBytes("f"))
052     .put(Bytes.toBytes("o"))
053     .put(Bytes.toBytes("o"));
054    Assert.assertEquals(3, r.getPosition());
055    Assert.assertArrayEquals(
056      new byte[] { 0, Bytes.toBytes("f")[0], Bytes.toBytes("o")[0], Bytes.toBytes("o")[0], 0 },
057      r.getBytes());
058
059    // exercise single-byte get
060    r.setPosition(0);
061    Assert.assertEquals(Bytes.toBytes("f")[0], r.get());
062    Assert.assertEquals(Bytes.toBytes("o")[0], r.get());
063    Assert.assertEquals(Bytes.toBytes("o")[0], r.get());
064
065    r.setPosition(1);
066    Assert.assertEquals(Bytes.toBytes("o")[0], r.get());
067
068    // exercise multi-byte get
069    r.setPosition(0);
070    byte[] dst = new byte[3];
071    r.get(dst);
072    Assert.assertArrayEquals(Bytes.toBytes("foo"), dst);
073
074    // set position to the end of the range; this should not throw.
075    r.setPosition(3);
076  }
077
078  @Test
079  public void testPutAndGetPrimitiveTypes() throws Exception {
080    PositionedByteRange pbr = new SimplePositionedMutableByteRange(100);
081    int i1 = 18, i2 = 2;
082    short s1 = 0;
083    long l1 = 1234L;
084    pbr.putInt(i1);
085    pbr.putInt(i2);
086    pbr.putShort(s1);
087    pbr.putLong(l1);
088    pbr.putVLong(0);
089    pbr.putVLong(l1);
090    pbr.putVLong(Long.MAX_VALUE);
091    pbr.putVLong(Long.MIN_VALUE);
092    // rewind
093    pbr.setPosition(0);
094    Assert.assertEquals(i1, pbr.getInt());
095    Assert.assertEquals(i2, pbr.getInt());
096    Assert.assertEquals(s1, pbr.getShort());
097    Assert.assertEquals(l1, pbr.getLong());
098    Assert.assertEquals(0, pbr.getVLong());
099    Assert.assertEquals(l1, pbr.getVLong());
100    Assert.assertEquals(Long.MAX_VALUE, pbr.getVLong());
101    Assert.assertEquals(Long.MIN_VALUE, pbr.getVLong());
102  }
103
104  @Test
105  public void testPutGetAPIsCompareWithBBAPIs() throws Exception {
106    // confirm that the long/int/short writing is same as BBs
107    PositionedByteRange pbr = new SimplePositionedMutableByteRange(100);
108    int i1 = -234, i2 = 2;
109    short s1 = 0;
110    long l1 = 1234L;
111    pbr.putInt(i1);
112    pbr.putShort(s1);
113    pbr.putInt(i2);
114    pbr.putLong(l1);
115    // rewind
116    pbr.setPosition(0);
117    Assert.assertEquals(i1, pbr.getInt());
118    Assert.assertEquals(s1, pbr.getShort());
119    Assert.assertEquals(i2, pbr.getInt());
120    Assert.assertEquals(l1, pbr.getLong());
121    // Read back using BB APIs
122    ByteBuffer bb = ByteBuffer.wrap(pbr.getBytes());
123    Assert.assertEquals(i1, bb.getInt());
124    Assert.assertEquals(s1, bb.getShort());
125    Assert.assertEquals(i2, bb.getInt());
126    Assert.assertEquals(l1, bb.getLong());
127  }
128}