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comparison test/org/tmatesoft/hg/test/TestAuxUtilities.java @ 311:b9592e21176a

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Tests for array sort and reverse index building helper
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 26 Sep 2011 04:06:04 +0200
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310:237de162be28 311:b9592e21176a
1 /*
2 * Copyright (c) 2011 TMate Software Ltd
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * For information on how to redistribute this software under
14 * the terms of a license other than GNU General Public License
15 * contact TMate Software at support@hg4j.com
16 */
17 package org.tmatesoft.hg.test;
18
19 import org.junit.Assert;
20 import org.junit.Test;
21 import org.tmatesoft.hg.internal.ArrayHelper;
22
23 /**
24 *
25 * @author Artem Tikhomirov
26 * @author TMate Software Ltd.
27 */
28 public class TestAuxUtilities {
29
30 @Test
31 public void testArrayHelper() {
32 String[] initial = {"d", "w", "k", "b", "c", "i", "a", "r", "e", "h" };
33 ArrayHelper ah = new ArrayHelper();
34 String[] result = initial.clone();
35 ah.sort(result);
36 String[] restored = restore(result, ah.getReverse());
37 Assert.assertArrayEquals(initial, restored);
38 //
39 // few elements are on the right place from the very start and do not shift during sort.
40 // make sure for them we've got correct reversed indexes as well
41 initial = new String[] {"d", "h", "c", "b", "k", "i", "a", "r", "e", "w" };
42 ah.sort(result = initial.clone());
43 restored = restore(result, ah.getReverse());
44 Assert.assertArrayEquals(initial, restored);
45 }
46
47 private static String[] restore(String[] sorted, int[] sortReverse) {
48 String[] rebuilt = new String[sorted.length];
49 for (int i = 0; i < sorted.length; i++) {
50 int indexInOriginal = sortReverse[i];
51 rebuilt[indexInOriginal-1] = sorted[i];
52 }
53 return rebuilt;
54 }
55 }