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 = HBaseClassTestRule.forClass(TestOrder.class);
038
039  byte[][] VALS = { Bytes.toBytes("foo"), Bytes.toBytes("bar"), Bytes.toBytes("baz") };
040
041  @Test
042  public void testApplyAscending() {
043    byte[][] vals = new byte[VALS.length][];
044    byte[][] ordered = new byte[VALS.length][];
045    for (int i = 0; i < VALS.length; i++) {
046      vals[i] = Arrays.copyOf(VALS[i], VALS[i].length);
047      ordered[i] = Arrays.copyOf(VALS[i], VALS[i].length);
048      ASCENDING.apply(ordered[i]);
049    }
050
051    Arrays.sort(vals, Bytes.BYTES_COMPARATOR);
052    Arrays.sort(ordered, Bytes.BYTES_COMPARATOR);
053
054    for (int i = 0; i < vals.length; i++) {
055      assertArrayEquals(vals[i], ordered[i]);
056    }
057
058    byte[] rangeApply = Arrays.copyOf(VALS[0], VALS[0].length);
059    ASCENDING.apply(rangeApply, 1, 1);
060    assertArrayEquals(VALS[0], rangeApply);
061  }
062
063  @Test
064  public void testApplyDescending() {
065    byte[][] vals = new byte[VALS.length][];
066    byte[][] ordered = new byte[VALS.length][];
067    for (int i = 0; i < VALS.length; i++) {
068      vals[i] = Arrays.copyOf(VALS[i], VALS[i].length);
069      ordered[i] = Arrays.copyOf(VALS[i], VALS[i].length);
070      DESCENDING.apply(ordered[i]);
071    }
072
073    Arrays.sort(vals, Collections.reverseOrder(Bytes.BYTES_COMPARATOR));
074    Arrays.sort(ordered, Bytes.BYTES_COMPARATOR);
075
076    for (int i = 0; i < vals.length; i++) {
077      DESCENDING.apply(ordered[i]);
078      assertArrayEquals(vals[i], ordered[i]);
079    }
080
081    byte[] expected = new byte[] { VALS[0][0], DESCENDING.apply(VALS[0][1]), VALS[0][2] };
082    byte[] rangeApply = Arrays.copyOf(VALS[0], VALS[0].length);
083    DESCENDING.apply(rangeApply, 1, 1);
084    assertArrayEquals(expected, rangeApply);
085  }
086}