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- /*
- * 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;
- }
- }
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