/*
* Copyright (C) 2008, Imran M Yousuf <imyousuf@smartitengineering.com>
* Copyright (C) 2008, Marek Zawirski <marek.zawirski@gmail.com>
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* - Neither the name of the Eclipse Foundation, Inc. nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.eclipse.jgit.internal.storage.file;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import org.eclipse.jgit.errors.CorruptObjectException;
import org.eclipse.jgit.internal.storage.file.PackIndex;
import org.eclipse.jgit.internal.storage.file.PackReverseIndex;
import org.eclipse.jgit.internal.storage.file.PackIndex.MutableEntry;
import org.eclipse.jgit.junit.JGitTestUtil;
import org.eclipse.jgit.junit.RepositoryTestCase;
import org.junit.Before;
import org.junit.Test;
public class PackReverseIndexTest extends RepositoryTestCase {
private PackIndex idx;
private PackReverseIndex reverseIdx;
/**
* Set up tested class instance, test constructor by the way.
*/
@Before
public void setUp() throws Exception {
super.setUp();
// index with both small (< 2^31) and big offsets
idx = PackIndex.open(JGitTestUtil.getTestResourceFile(
"pack-huge.idx"));
reverseIdx = new PackReverseIndex(idx);
}
/**
* Test findObject() for all index entries.
*/
@Test
public void testFindObject() {
for (MutableEntry me : idx)
assertEquals(me.toObjectId(), reverseIdx.findObject(me.getOffset()));
}
/**
* Test findObject() with illegal argument.
*/
@Test
public void testFindObjectWrongOffset() {
assertNull(reverseIdx.findObject(0));
}
/**
* Test findNextOffset() for all index entries.
*
* @throws CorruptObjectException
*/
@Test
public void testFindNextOffset() throws CorruptObjectException {
long offset = findFirstOffset();
assertTrue(offset > 0);
for (int i = 0; i < idx.getObjectCount(); i++) {
long newOffset = reverseIdx.findNextOffset(offset, Long.MAX_VALUE);
assertTrue(newOffset > offset);
if (i == idx.getObjectCount() - 1)
assertEquals(newOffset, Long.MAX_VALUE);
else
assertEquals(newOffset, idx.findOffset(reverseIdx
.findObject(newOffset)));
offset = newOffset;
}
}
/**
* Test findNextOffset() with wrong illegal argument as offset.
*/
@Test
public void testFindNextOffsetWrongOffset() {
try {
reverseIdx.findNextOffset(0, Long.MAX_VALUE);
fail("findNextOffset() should throw exception");
} catch (CorruptObjectException x) {
// expected
}
}
private long findFirstOffset() {
long min = Long.MAX_VALUE;
for (MutableEntry me : idx)
min = Math.min(min, me.getOffset());
return min;
}
}