1 /*
2 * Copyright (C) 2008, Imran M Yousuf <imyousuf@smartitengineering.com>
3 * Copyright (C) 2008, Marek Zawirski <marek.zawirski@gmail.com>
4 * and other copyright owners as documented in the project's IP log.
5 *
6 * This program and the accompanying materials are made available
7 * under the terms of the Eclipse Distribution License v1.0 which
8 * accompanies this distribution, is reproduced below, and is
9 * available at http://www.eclipse.org/org/documents/edl-v10.php
10 *
11 * All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials provided
23 * with the distribution.
24 *
25 * - Neither the name of the Eclipse Foundation, Inc. nor the
26 * names of its contributors may be used to endorse or promote
27 * products derived from this software without specific prior
28 * written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
31 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
32 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
33 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
35 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
36 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
37 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
38 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
39 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
42 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 */
44
45 package org.eclipse.jgit.internal.storage.file;
46
47 import static org.junit.Assert.assertEquals;
48 import static org.junit.Assert.assertNull;
49 import static org.junit.Assert.assertTrue;
50 import static org.junit.Assert.fail;
51
52 import org.eclipse.jgit.errors.CorruptObjectException;
53 import org.eclipse.jgit.internal.storage.file.PackIndex;
54 import org.eclipse.jgit.internal.storage.file.PackReverseIndex;
55 import org.eclipse.jgit.internal.storage.file.PackIndex.MutableEntry;
56 import org.eclipse.jgit.junit.JGitTestUtil;
57 import org.eclipse.jgit.junit.RepositoryTestCase;
58 import org.junit.Before;
59 import org.junit.Test;
60
61 public class PackReverseIndexTest extends RepositoryTestCase {
62
63 private PackIndex idx;
64
65 private PackReverseIndex reverseIdx;
66
67 /**
68 * Set up tested class instance, test constructor by the way.
69 */
70 @Before
71 public void setUp() throws Exception {
72 super.setUp();
73 // index with both small (< 2^31) and big offsets
74 idx = PackIndex.open(JGitTestUtil.getTestResourceFile(
75 "pack-huge.idx"));
76 reverseIdx = new PackReverseIndex(idx);
77 }
78
79 /**
80 * Test findObject() for all index entries.
81 */
82 @Test
83 public void testFindObject() {
84 for (MutableEntry me : idx)
85 assertEquals(me.toObjectId(), reverseIdx.findObject(me.getOffset()));
86 }
87
88 /**
89 * Test findObject() with illegal argument.
90 */
91 @Test
92 public void testFindObjectWrongOffset() {
93 assertNull(reverseIdx.findObject(0));
94 }
95
96 /**
97 * Test findNextOffset() for all index entries.
98 *
99 * @throws CorruptObjectException
100 */
101 @Test
102 public void testFindNextOffset() throws CorruptObjectException {
103 long offset = findFirstOffset();
104 assertTrue(offset > 0);
105 for (int i = 0; i < idx.getObjectCount(); i++) {
106 long newOffset = reverseIdx.findNextOffset(offset, Long.MAX_VALUE);
107 assertTrue(newOffset > offset);
108 if (i == idx.getObjectCount() - 1)
109 assertEquals(newOffset, Long.MAX_VALUE);
110 else
111 assertEquals(newOffset, idx.findOffset(reverseIdx
112 .findObject(newOffset)));
113 offset = newOffset;
114 }
115 }
116
117 /**
118 * Test findNextOffset() with wrong illegal argument as offset.
119 */
120 @Test
121 public void testFindNextOffsetWrongOffset() {
122 try {
123 reverseIdx.findNextOffset(0, Long.MAX_VALUE);
124 fail("findNextOffset() should throw exception");
125 } catch (CorruptObjectException x) {
126 // expected
127 }
128 }
129
130 private long findFirstOffset() {
131 long min = Long.MAX_VALUE;
132 for (MutableEntry me : idx)
133 min = Math.min(min, me.getOffset());
134 return min;
135 }
136 }