| /* |
| * Copyright (C) 2008, Imran M Yousuf <imyousuf@smartitengineering.com> |
| * Copyright (C) 2008, Marek Zawirski <marek.zawirski@gmail.com> and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| 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.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. |
| */ |
| @Override |
| @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; |
| } |
| } |