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/*
* Copyright (C) 2017, Google Inc. 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.dfs;
import static org.eclipse.jgit.internal.storage.dfs.DfsObjDatabase.PackSource.COMPACT;
import static org.eclipse.jgit.internal.storage.dfs.DfsObjDatabase.PackSource.INSERT;
import static org.eclipse.jgit.internal.storage.pack.PackExt.OBJECT_SIZE_INDEX;
import static org.eclipse.jgit.internal.storage.pack.PackExt.PACK;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.Arrays;
import java.util.Optional;
import org.eclipse.jgit.junit.TestRepository;
import org.eclipse.jgit.lib.ConfigConstants;
import org.eclipse.jgit.revwalk.RevCommit;
import org.junit.Before;
import org.junit.Test;
public class DfsPackCompacterTest {
private TestRepository<InMemoryRepository> git;
private InMemoryRepository repo;
private DfsObjDatabase odb;
@Before
public void setUp() throws IOException {
DfsRepositoryDescription desc = new DfsRepositoryDescription("test");
git = new TestRepository<>(new InMemoryRepository(desc));
repo = git.getRepository();
odb = repo.getObjectDatabase();
}
@Test
public void testEstimateCompactPackSizeInNewRepo() throws Exception {
RevCommit commit0 = commit().message("0").create();
RevCommit commit1 = commit().message("1").parent(commit0).create();
git.update("master", commit1);
// Packs start out as INSERT.
long inputPacksSize = 32;
assertEquals(2, odb.getPacks().length);
for (DfsPackFile pack : odb.getPacks()) {
assertEquals(INSERT, pack.getPackDescription().getPackSource());
inputPacksSize += pack.getPackDescription().getFileSize(PACK) - 32;
}
compact();
// INSERT packs are compacted into a single COMPACT pack.
assertEquals(1, odb.getPacks().length);
DfsPackFile pack = odb.getPacks()[0];
assertEquals(COMPACT, pack.getPackDescription().getPackSource());
assertEquals(inputPacksSize,
pack.getPackDescription().getEstimatedPackSize());
}
@Test
public void testEstimateGcPackSizeWithAnExistingGcPack() throws Exception {
RevCommit commit0 = commit().message("0").create();
RevCommit commit1 = commit().message("1").parent(commit0).create();
git.update("master", commit1);
compact();
RevCommit commit2 = commit().message("2").parent(commit1).create();
git.update("master", commit2);
// There will be one INSERT pack and one COMPACT pack.
assertEquals(2, odb.getPacks().length);
boolean compactPackFound = false;
boolean insertPackFound = false;
long inputPacksSize = 32;
for (DfsPackFile pack : odb.getPacks()) {
DfsPackDescription packDescription = pack.getPackDescription();
if (packDescription.getPackSource() == COMPACT) {
compactPackFound = true;
}
if (packDescription.getPackSource() == INSERT) {
insertPackFound = true;
}
inputPacksSize += packDescription.getFileSize(PACK) - 32;
}
assertTrue(compactPackFound);
assertTrue(insertPackFound);
compact();
// INSERT pack is combined into the COMPACT pack.
DfsPackFile pack = odb.getPacks()[0];
assertEquals(COMPACT, pack.getPackDescription().getPackSource());
assertEquals(inputPacksSize,
pack.getPackDescription().getEstimatedPackSize());
}
@Test
public void testObjectSizeIndexWritten() throws Exception {
writeObjectSizeIndex(repo, true);
RevCommit commit0 = commit().message("0").create();
RevCommit commit1 = commit().message("1").parent(commit0).create();
git.update("master", commit1);
compact();
Optional<DfsPackFile> compactPack = Arrays.stream(odb.getPacks())
.filter(pack -> pack.getPackDescription()
.getPackSource() == COMPACT)
.findFirst();
assertTrue(compactPack.isPresent());
assertTrue(compactPack.get().getPackDescription().hasFileExt(OBJECT_SIZE_INDEX));
}
@Test
public void testObjectSizeIndexNotWritten() throws Exception {
writeObjectSizeIndex(repo, false);
RevCommit commit0 = commit().message("0").create();
RevCommit commit1 = commit().message("1").parent(commit0).create();
git.update("master", commit1);
compact();
Optional<DfsPackFile> compactPack = Arrays.stream(odb.getPacks())
.filter(pack -> pack.getPackDescription()
.getPackSource() == COMPACT)
.findFirst();
assertTrue(compactPack.isPresent());
assertFalse(compactPack.get().getPackDescription().hasFileExt(OBJECT_SIZE_INDEX));
}
private TestRepository<InMemoryRepository>.CommitBuilder commit() {
return git.commit();
}
private void compact() throws IOException {
DfsPackCompactor compactor = new DfsPackCompactor(repo);
compactor.autoAdd();
compactor.compact(null);
odb.clearCache();
}
private static void writeObjectSizeIndex(DfsRepository repo, boolean should) {
repo.getConfig().setInt(ConfigConstants.CONFIG_PACK_SECTION, null,
ConfigConstants.CONFIG_KEY_MIN_BYTES_OBJ_SIZE_INDEX, should ? 0 : -1);
}
}
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