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