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 static org.apache.hadoop.hbase.util.Order.ASCENDING;
021import static org.apache.hadoop.hbase.util.Order.DESCENDING;
022import static org.junit.Assert.assertArrayEquals;
023
024import java.util.Arrays;
025import java.util.Collections;
026import org.apache.hadoop.hbase.HBaseClassTestRule;
027import org.apache.hadoop.hbase.testclassification.MiscTests;
028import org.apache.hadoop.hbase.testclassification.SmallTests;
029import org.junit.ClassRule;
030import org.junit.Test;
031import org.junit.experimental.categories.Category;
032
033@Category({MiscTests.class, SmallTests.class})
034public class TestOrder {
035
036  @ClassRule
037  public static final HBaseClassTestRule CLASS_RULE =
038      HBaseClassTestRule.forClass(TestOrder.class);
039
040  byte[][] VALS = { Bytes.toBytes("foo"), Bytes.toBytes("bar"), Bytes.toBytes("baz") };
041
042  @Test
043  public void testApplyAscending() {
044    byte[][] vals = new byte[VALS.length][];
045    byte[][] ordered = new byte[VALS.length][];
046    for (int i = 0; i < VALS.length; i++) {
047      vals[i] = Arrays.copyOf(VALS[i], VALS[i].length);
048      ordered[i] = Arrays.copyOf(VALS[i], VALS[i].length);
049      ASCENDING.apply(ordered[i]);
050    }
051
052    Arrays.sort(vals, Bytes.BYTES_COMPARATOR);
053    Arrays.sort(ordered, Bytes.BYTES_COMPARATOR);
054
055    for (int i = 0; i < vals.length; i++) {
056      assertArrayEquals(vals[i], ordered[i]);
057    }
058
059    byte[] rangeApply = Arrays.copyOf(VALS[0], VALS[0].length);
060    ASCENDING.apply(rangeApply, 1, 1);
061    assertArrayEquals(VALS[0], rangeApply);
062  }
063
064  @Test
065  public void testApplyDescending() {
066    byte[][] vals = new byte[VALS.length][];
067    byte[][] ordered = new byte[VALS.length][];
068    for (int i = 0; i < VALS.length; i++) {
069      vals[i] = Arrays.copyOf(VALS[i], VALS[i].length);
070      ordered[i] = Arrays.copyOf(VALS[i], VALS[i].length);
071      DESCENDING.apply(ordered[i]);
072    }
073
074    Arrays.sort(vals, Collections.reverseOrder(Bytes.BYTES_COMPARATOR));
075    Arrays.sort(ordered, Bytes.BYTES_COMPARATOR);
076
077    for (int i = 0; i < vals.length; i++) {
078      DESCENDING.apply(ordered[i]);
079      assertArrayEquals(vals[i], ordered[i]);
080    }
081
082    byte[] expected = new byte[] { VALS[0][0], DESCENDING.apply(VALS[0][1]), VALS[0][2] };
083    byte[] rangeApply = Arrays.copyOf(VALS[0], VALS[0].length);
084    DESCENDING.apply(rangeApply, 1, 1);
085    assertArrayEquals(expected, rangeApply);
086  }
087}