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/*
* Copyright (C) 2019 Google LLC 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.eclipse.jgit.lib.Ref.Storage.PACKED;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThrows;
import static org.junit.Assert.assertTrue;
import static org.junit.Assume.assumeFalse;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
import org.eclipse.jgit.internal.storage.file.FileReftableStack.Segment;
import org.eclipse.jgit.internal.storage.reftable.MergedReftable;
import org.eclipse.jgit.internal.storage.reftable.RefCursor;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectIdRef;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.util.FileUtils;
import org.eclipse.jgit.util.SystemReader;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class FileReftableStackTest {
private static Ref newRef(String name, ObjectId id) {
return new ObjectIdRef.PeeledNonTag(PACKED, name, id);
}
private File reftableDir;
@Before
public void setup() throws Exception {
reftableDir = FileUtils.createTempDir("rtstack", "", null);
}
@After
public void tearDown() throws Exception {
if (reftableDir != null) {
FileUtils.delete(reftableDir, FileUtils.RECURSIVE);
}
}
void writeBranches(FileReftableStack stack, String template, int start,
int N) throws IOException {
for (int i = 0; i < N; i++) {
while (true) {
final long next = stack.getMergedReftable().maxUpdateIndex()
+ 1;
String name = String.format(template,
Integer.valueOf(start + i));
Ref r = newRef(name, ObjectId.zeroId());
boolean ok = stack.addReftable(rw -> {
rw.setMinUpdateIndex(next).setMaxUpdateIndex(next).begin()
.writeRef(r);
});
if (ok) {
break;
}
}
}
}
public void testCompaction(int N) throws Exception {
try (FileReftableStack stack = new FileReftableStack(reftableDir, null,
() -> new Config())) {
writeBranches(stack, "refs/heads/branch%d", 0, N);
MergedReftable table = stack.getMergedReftable();
for (int i = 1; i < N; i++) {
String name = String.format("refs/heads/branch%d",
Integer.valueOf(i));
RefCursor c = table.seekRef(name);
assertTrue(c.next());
assertEquals(ObjectId.zeroId(), c.getRef().getObjectId());
}
List<String> files = Files.list(reftableDir.toPath())
.map(Path::getFileName).map(Path::toString)
.collect(Collectors.toList());
Collections.sort(files);
assertTrue(files.size() < 20);
FileReftableStack.CompactionStats stats = stack.getStats();
assertEquals(0, stats.failed);
assertTrue(stats.attempted < N);
assertTrue(stats.refCount < FileReftableStack.log(N) * N);
}
}
@Test
public void testCompaction9() throws Exception {
testCompaction(9);
}
@Test
public void testCompaction1024() throws Exception {
testCompaction(1024);
}
@SuppressWarnings("resource")
@Test
public void missingReftable() throws Exception {
// Can't delete in-use files on Windows.
assumeFalse(SystemReader.getInstance().isWindows());
try (FileReftableStack stack = new FileReftableStack(reftableDir, null,
() -> new Config())) {
outer: for (int i = 0; i < 10; i++) {
final long next = stack.getMergedReftable().maxUpdateIndex()
+ 1;
String name = String.format("branch%d", Integer.valueOf(i));
Ref r = newRef(name, ObjectId.zeroId());
boolean ok = stack.addReftable(rw -> {
rw.setMinUpdateIndex(next).setMaxUpdateIndex(next).begin()
.writeRef(r);
});
assertTrue(ok);
List<Path> files = Files.list(reftableDir.toPath())
.collect(Collectors.toList());
for (int j = 0; j < files.size(); j++) {
Path f = files.get(j);
Path fileName = f.getFileName();
if (fileName != null
&& fileName.toString().endsWith(".ref")) {
Files.delete(f);
break outer;
}
}
}
}
assertThrows(FileNotFoundException.class,
() -> new FileReftableStack(reftableDir, null,
() -> new Config()));
}
@Test
public void testSegments() {
long in[] = { 1024, 1024, 1536, 100, 64, 50, 25, 24 };
List<Segment> got = FileReftableStack.segmentSizes(in);
Segment want[] = { new Segment(0, 3, 10, 3584),
new Segment(3, 5, 6, 164), new Segment(5, 6, 5, 50),
new Segment(6, 8, 4, 49), };
assertEquals(got.size(), want.length);
for (int i = 0; i < want.length; i++) {
assertTrue(want[i].equals(got.get(i)));
}
}
@Test
public void testLog2() throws Exception {
assertEquals(10, FileReftableStack.log(1024));
assertEquals(10, FileReftableStack.log(1025));
assertEquals(10, FileReftableStack.log(2047));
}
}
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