1 /*
2 * Copyright (C) 2012, Google Inc.
3 * and other copyright owners as documented in the project's IP log.
4 *
5 * This program and the accompanying materials are made available
6 * under the terms of the Eclipse Distribution License v1.0 which
7 * accompanies this distribution, is reproduced below, and is
8 * available at http://www.eclipse.org/org/documents/edl-v10.php
9 *
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials provided
22 * with the distribution.
23 *
24 * - Neither the name of the Eclipse Foundation, Inc. nor the
25 * names of its contributors may be used to endorse or promote
26 * products derived from this software without specific prior
27 * written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
30 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
34 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43
44 package org.eclipse.jgit.internal.storage.file;
45
46 import static org.junit.Assert.assertEquals;
47
48 import org.eclipse.jgit.internal.storage.file.BasePackBitmapIndex.StoredBitmap;
49 import org.eclipse.jgit.lib.ObjectId;
50 import org.junit.Test;
51
52 import com.googlecode.javaewah.EWAHCompressedBitmap;
53
54 public class StoredBitmapTest {
55
56 @Test
57 public void testGetBitmapWithoutXor() {
58 EWAHCompressedBitmap b = bitmapOf(100);
59 StoredBitmap sb = newStoredBitmap(bitmapOf(100));
60 assertEquals(b, sb.getBitmap());
61 }
62
63 @Test
64 public void testGetBitmapWithOneXor() {
65 StoredBitmap sb = newStoredBitmap(bitmapOf(100), bitmapOf(100, 101));
66 assertEquals(bitmapOf(101), sb.getBitmap());
67 }
68
69 @Test
70 public void testGetBitmapWithThreeXor() {
71 StoredBitmap sb = newStoredBitmap(
72 bitmapOf(100),
73 bitmapOf(90, 101),
74 bitmapOf(100, 101),
75 bitmapOf(50));
76 assertEquals(bitmapOf(50, 90), sb.getBitmap());
77 assertEquals(bitmapOf(50, 90), sb.getBitmap());
78 }
79
80 private static final StoredBitmap newStoredBitmap(
81 EWAHCompressedBitmap... bitmaps) {
82 StoredBitmap sb = null;
83 for (EWAHCompressedBitmap bitmap : bitmaps)
84 sb = new StoredBitmap(ObjectId.zeroId(), bitmap, sb, 0);
85 return sb;
86 }
87
88 private static final EWAHCompressedBitmap bitmapOf(int... bits) {
89 EWAHCompressedBitmap b = new EWAHCompressedBitmap();
90 for (int bit : bits)
91 b.set(bit);
92 return b;
93 }
94 }