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reftable: basic functionality unit tests 

This set of tests covers primitive storage of an empty
file, and each type of supported reference.

Change-Id: I3bdff35cae8ae27283051932f20608b3ac353559
stable-4.9
Shawn Pearce 8 years ago
parent
0398f3dd6e
commit
b6e25e5d7e
2 changed files with 359 additions and 0 deletions
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  1. 2
      org.eclipse.jgit.test/META-INF/MANIFEST.MF
  2. 357
      org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/reftable/ReftableTest.java

2
org.eclipse.jgit.test/META-INF/MANIFEST.MF
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@ -26,7 +26,9 @@ Import-Package: com.googlecode.javaewah;version="[1.1.6,2.0.0)",
org.eclipse.jgit.internal.fsck;version="[4.9.0,4.10.0)",
org.eclipse.jgit.internal.storage.dfs;version="[4.9.0,4.10.0)",
org.eclipse.jgit.internal.storage.file;version="[4.9.0,4.10.0)",
org.eclipse.jgit.internal.storage.io;version="[4.9.0,4.10.0)",
org.eclipse.jgit.internal.storage.pack;version="[4.9.0,4.10.0)",
org.eclipse.jgit.internal.storage.reftable;version="[4.9.0,4.10.0)",
org.eclipse.jgit.internal.storage.reftree;version="[4.9.0,4.10.0)",
org.eclipse.jgit.junit;version="[4.9.0,4.10.0)",
org.eclipse.jgit.lfs;version="[4.9.0,4.10.0)",

357
org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/reftable/ReftableTest.java
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@ -0,0 +1,357 @@
/*
* Copyright (C) 2017, Google Inc.
* 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.reftable;
import static org.eclipse.jgit.lib.Constants.HEAD;
import static org.eclipse.jgit.lib.Constants.OBJECT_ID_LENGTH;
import static org.eclipse.jgit.lib.Constants.R_HEADS;
import static org.eclipse.jgit.lib.Ref.Storage.NEW;
import static org.eclipse.jgit.lib.Ref.Storage.PACKED;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.eclipse.jgit.internal.JGitText;
import org.eclipse.jgit.internal.storage.io.BlockSource;
import org.eclipse.jgit.internal.storage.reftable.ReftableWriter.Stats;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectIdRef;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.SymbolicRef;
import org.junit.Test;
public class ReftableTest {
private static final String MASTER = "refs/heads/master";
private static final String V1_0 = "refs/tags/v1.0";
private Stats stats;
@Test
public void emptyTable() throws IOException {
byte[] table = write();
assertEquals(92 /* header, footer */, table.length);
assertEquals('R', table[0]);
assertEquals('E', table[1]);
assertEquals('F', table[2]);
assertEquals('T', table[3]);
assertEquals(0x01, table[4]);
assertTrue(ReftableConstants.isFileHeaderMagic(table, 0, 8));
assertTrue(ReftableConstants.isFileHeaderMagic(table, 24, 92));
Reftable t = read(table);
try (RefCursor rc = t.allRefs()) {
assertFalse(rc.next());
}
try (RefCursor rc = t.seekRef(HEAD)) {
assertFalse(rc.next());
}
try (RefCursor rc = t.seekRef(R_HEADS)) {
assertFalse(rc.next());
}
try (LogCursor rc = t.allLogs()) {
assertFalse(rc.next());
}
}
@Test
public void emptyVirtualTableFromRefs() throws IOException {
Reftable t = Reftable.from(Collections.emptyList());
try (RefCursor rc = t.allRefs()) {
assertFalse(rc.next());
}
try (RefCursor rc = t.seekRef(HEAD)) {
assertFalse(rc.next());
}
try (LogCursor rc = t.allLogs()) {
assertFalse(rc.next());
}
}
@Test
public void estimateCurrentBytesOneRef() throws IOException {
Ref exp = ref(MASTER, 1);
int expBytes = 24 + 4 + 5 + 3 + MASTER.length() + 20 + 68;
byte[] table;
ReftableConfig cfg = new ReftableConfig();
cfg.setIndexObjects(false);
ReftableWriter writer = new ReftableWriter().setConfig(cfg);
try (ByteArrayOutputStream buf = new ByteArrayOutputStream()) {
writer.begin(buf);
assertEquals(92, writer.estimateTotalBytes());
writer.writeRef(exp);
assertEquals(expBytes, writer.estimateTotalBytes());
writer.finish();
table = buf.toByteArray();
}
assertEquals(expBytes, table.length);
}
@SuppressWarnings("boxing")
@Test
public void estimateCurrentBytesWithIndex() throws IOException {
List<Ref> refs = new ArrayList<>();
for (int i = 1; i <= 5670; i++) {
refs.add(ref(String.format("refs/heads/%04d", i), i));
}
ReftableConfig cfg = new ReftableConfig();
cfg.setIndexObjects(false);
cfg.setMaxIndexLevels(1);
int expBytes = 139654;
byte[] table;
ReftableWriter writer = new ReftableWriter().setConfig(cfg);
try (ByteArrayOutputStream buf = new ByteArrayOutputStream()) {
writer.begin(buf);
writer.sortAndWriteRefs(refs);
assertEquals(expBytes, writer.estimateTotalBytes());
writer.finish();
stats = writer.getStats();
table = buf.toByteArray();
}
assertEquals(1, stats.refIndexLevels());
assertEquals(expBytes, table.length);
}
@Test
public void oneIdRef() throws IOException {
Ref exp = ref(MASTER, 1);
byte[] table = write(exp);
assertEquals(24 + 4 + 5 + 3 + MASTER.length() + 20 + 68, table.length);
ReftableReader t = read(table);
try (RefCursor rc = t.allRefs()) {
assertTrue(rc.next());
Ref act = rc.getRef();
assertNotNull(act);
assertEquals(PACKED, act.getStorage());
assertTrue(act.isPeeled());
assertFalse(act.isSymbolic());
assertEquals(exp.getName(), act.getName());
assertEquals(exp.getObjectId(), act.getObjectId());
assertNull(act.getPeeledObjectId());
assertFalse(rc.wasDeleted());
assertFalse(rc.next());
}
try (RefCursor rc = t.seekRef(MASTER)) {
assertTrue(rc.next());
Ref act = rc.getRef();
assertNotNull(act);
assertEquals(exp.getName(), act.getName());
assertFalse(rc.next());
}
}
@Test
public void oneTagRef() throws IOException {
Ref exp = tag(V1_0, 1, 2);
byte[] table = write(exp);
assertEquals(24 + 4 + 5 + 2 + V1_0.length() + 40 + 68, table.length);
ReftableReader t = read(table);
try (RefCursor rc = t.allRefs()) {
assertTrue(rc.next());
Ref act = rc.getRef();
assertNotNull(act);
assertEquals(PACKED, act.getStorage());
assertTrue(act.isPeeled());
assertFalse(act.isSymbolic());
assertEquals(exp.getName(), act.getName());
assertEquals(exp.getObjectId(), act.getObjectId());
assertEquals(exp.getPeeledObjectId(), act.getPeeledObjectId());
}
}
@Test
public void oneSymbolicRef() throws IOException {
Ref exp = sym(HEAD, MASTER);
byte[] table = write(exp);
assertEquals(
24 + 4 + 5 + 2 + HEAD.length() + 1 + MASTER.length() + 68,
table.length);
ReftableReader t = read(table);
try (RefCursor rc = t.allRefs()) {
assertTrue(rc.next());
Ref act = rc.getRef();
assertNotNull(act);
assertTrue(act.isSymbolic());
assertEquals(exp.getName(), act.getName());
assertNotNull(act.getLeaf());
assertEquals(MASTER, act.getTarget().getName());
assertNull(act.getObjectId());
}
}
@Test
public void oneDeletedRef() throws IOException {
String name = "refs/heads/gone";
Ref exp = newRef(name);
byte[] table = write(exp);
assertEquals(24 + 4 + 5 + 2 + name.length() + 68, table.length);
ReftableReader t = read(table);
try (RefCursor rc = t.allRefs()) {
assertFalse(rc.next());
}
t.setIncludeDeletes(true);
try (RefCursor rc = t.allRefs()) {
assertTrue(rc.next());
Ref act = rc.getRef();
assertNotNull(act);
assertFalse(act.isSymbolic());
assertEquals(name, act.getName());
assertEquals(NEW, act.getStorage());
assertNull(act.getObjectId());
assertTrue(rc.wasDeleted());
}
}
@Test
public void seekNotFound() throws IOException {
Ref exp = ref(MASTER, 1);
ReftableReader t = read(write(exp));
try (RefCursor rc = t.seekRef("refs/heads/a")) {
assertFalse(rc.next());
}
try (RefCursor rc = t.seekRef("refs/heads/n")) {
assertFalse(rc.next());
}
}
public void unpeeledDoesNotWrite() {
try {
write(new ObjectIdRef.Unpeeled(PACKED, MASTER, id(1)));
fail("expected IOException");
} catch (IOException e) {
assertEquals(JGitText.get().peeledRefIsRequired, e.getMessage());
}
}
@Test
public void nameTooLongDoesNotWrite() throws IOException {
try {
ReftableConfig cfg = new ReftableConfig();
cfg.setRefBlockSize(64);
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
ReftableWriter writer = new ReftableWriter(cfg).begin(buffer);
writer.writeRef(ref("refs/heads/i-am-not-a-teapot", 1));
writer.finish();
fail("expected BlockSizeTooSmallException");
} catch (BlockSizeTooSmallException e) {
assertEquals(84, e.getMinimumBlockSize());
}
}
@Test
public void badCrc32() throws IOException {
byte[] table = write();
table[table.length - 1] = 0x42;
try {
read(table).seekRef(HEAD);
fail("expected IOException");
} catch (IOException e) {
assertEquals(JGitText.get().invalidReftableCRC, e.getMessage());
}
}
private static Ref ref(String name, int id) {
return new ObjectIdRef.PeeledNonTag(PACKED, name, id(id));
}
private static Ref tag(String name, int id1, int id2) {
return new ObjectIdRef.PeeledTag(PACKED, name, id(id1), id(id2));
}
private static Ref sym(String name, String target) {
return new SymbolicRef(name, newRef(target));
}
private static Ref newRef(String name) {
return new ObjectIdRef.Unpeeled(NEW, name, null);
}
private static ObjectId id(int i) {
byte[] buf = new byte[OBJECT_ID_LENGTH];
buf[0] = (byte) (i & 0xff);
buf[1] = (byte) ((i >>> 8) & 0xff);
buf[2] = (byte) ((i >>> 16) & 0xff);
buf[3] = (byte) (i >>> 24);
return ObjectId.fromRaw(buf);
}
private static ReftableReader read(byte[] table) {
return new ReftableReader(BlockSource.from(table));
}
private byte[] write(Ref... refs) throws IOException {
return write(Arrays.asList(refs));
}
private byte[] write(Collection<Ref> refs) throws IOException {
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
stats = new ReftableWriter()
.begin(buffer)
.sortAndWriteRefs(refs)
.finish()
.getStats();
return buffer.toByteArray();
}
}
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