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.nio;
019
020import static org.junit.Assert.assertEquals;
021
022import java.nio.ByteBuffer;
023import org.apache.hadoop.hbase.HBaseClassTestRule;
024import org.apache.hadoop.hbase.testclassification.MiscTests;
025import org.apache.hadoop.hbase.testclassification.SmallTests;
026import org.junit.ClassRule;
027import org.junit.Test;
028import org.junit.experimental.categories.Category;
029
030@Category({ MiscTests.class, SmallTests.class })
031public class TestSingleByteBuff {
032
033  @ClassRule
034  public static final HBaseClassTestRule CLASS_RULE =
035    HBaseClassTestRule.forClass(TestSingleByteBuff.class);
036
037  @Test
038  public void testPositionalReads() {
039    // Off heap buffer
040    testPositionalReads(ByteBuffer.allocateDirect(15));
041    // On heap buffer
042    testPositionalReads(ByteBuffer.allocate(15));
043  }
044
045  private void testPositionalReads(ByteBuffer bb) {
046    int i = 9;
047    short s = 5;
048    byte b = 2;
049    long l = 1234L;
050    bb.putInt(i);
051    bb.putLong(l);
052    bb.put(b);
053    bb.putShort(s);
054    SingleByteBuff sbb = new SingleByteBuff(bb);
055    assertEquals(i, sbb.getInt(0));
056    assertEquals(l, sbb.getLong(4));
057    assertEquals(b, sbb.get(12));
058    assertEquals(s, sbb.getShort(13));
059    sbb.rewind();
060    assertEquals(i, sbb.getIntAfterPosition(0));
061    assertEquals(l, sbb.getLongAfterPosition(4));
062    assertEquals(b, sbb.getByteAfterPosition(12));
063    assertEquals(s, sbb.getShortAfterPosition(13));
064  }
065}