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/*
* Copyright (C) 2009, 2023 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.dircache;
import static java.time.Instant.EPOCH;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.security.MessageDigest;
import java.time.Instant;
import java.util.concurrent.TimeUnit;
import org.eclipse.jgit.dircache.DirCache.DirCacheVersion;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.FileMode;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.util.MutableInteger;
import org.junit.Test;
public class DirCacheEntryTest {
@Test
public void testIsValidPath() {
assertTrue(isValidPath("a"));
assertTrue(isValidPath("a/b"));
assertTrue(isValidPath("ab/cd/ef"));
assertFalse(isValidPath(""));
assertFalse(isValidPath("/a"));
assertFalse(isValidPath("a//b"));
assertFalse(isValidPath("ab/cd//ef"));
assertFalse(isValidPath("a/"));
assertFalse(isValidPath("ab/cd/ef/"));
assertFalse(isValidPath("a\u0000b"));
assertFalse(isValidPath(".git"));
assertFalse(isValidPath(".GIT"));
assertFalse(isValidPath(".Git"));
assertFalse(isValidPath(".git/b"));
assertFalse(isValidPath(".GIT/b"));
assertFalse(isValidPath(".Git/b"));
assertFalse(isValidPath("x/y/.git/z/b"));
assertFalse(isValidPath("x/y/.GIT/z/b"));
assertFalse(isValidPath("x/y/.Git/z/b"));
assertTrue(isValidPath("git/b"));
}
@SuppressWarnings("unused")
private static boolean isValidPath(String path) {
try {
new DirCacheEntry(path);
return true;
} catch (InvalidPathException e) {
return false;
}
}
private static void checkPath(DirCacheVersion indexVersion,
DirCacheEntry previous, String name) throws IOException {
DirCacheEntry dce = new DirCacheEntry(name);
long now = System.currentTimeMillis();
long anHourAgo = now - TimeUnit.HOURS.toMillis(1);
dce.setLastModified(Instant.ofEpochMilli(anHourAgo));
ByteArrayOutputStream out = new ByteArrayOutputStream();
dce.write(out, indexVersion, previous);
byte[] raw = out.toByteArray();
MessageDigest md0 = Constants.newMessageDigest();
md0.update(raw);
ByteArrayInputStream in = new ByteArrayInputStream(raw);
MutableInteger infoAt = new MutableInteger();
byte[] sharedInfo = new byte[raw.length];
MessageDigest md = Constants.newMessageDigest();
DirCacheEntry read = new DirCacheEntry(sharedInfo, infoAt, in, md,
Instant.ofEpochMilli(now), indexVersion, previous);
assertEquals("Paths of length " + name.length() + " should match", name,
read.getPathString());
assertEquals("Should have been fully read", -1, in.read());
assertArrayEquals("Digests should match", md0.digest(),
md.digest());
}
@Test
public void testLongPath() throws Exception {
StringBuilder name = new StringBuilder(4094 + 16);
for (int i = 0; i < 4094; i++) {
name.append('a');
}
for (int j = 0; j < 16; j++) {
checkPath(DirCacheVersion.DIRC_VERSION_EXTENDED, null,
name.toString());
name.append('b');
}
}
@Test
public void testLongPathV4() throws Exception {
StringBuilder name = new StringBuilder(4094 + 16);
for (int i = 0; i < 4094; i++) {
name.append('a');
}
DirCacheEntry previous = new DirCacheEntry(name.toString());
for (int j = 0; j < 16; j++) {
checkPath(DirCacheVersion.DIRC_VERSION_PATHCOMPRESS, previous,
name.toString());
name.append('b');
}
}
@Test
public void testShortPath() throws Exception {
StringBuilder name = new StringBuilder(1 + 16);
name.append('a');
for (int j = 0; j < 16; j++) {
checkPath(DirCacheVersion.DIRC_VERSION_EXTENDED, null,
name.toString());
name.append('b');
}
}
@Test
public void testShortPathV4() throws Exception {
StringBuilder name = new StringBuilder(1 + 16);
name.append('a');
DirCacheEntry previous = new DirCacheEntry(name.toString());
for (int j = 0; j < 16; j++) {
checkPath(DirCacheVersion.DIRC_VERSION_PATHCOMPRESS, previous,
name.toString());
name.append('b');
}
}
@Test
public void testPathV4() throws Exception {
StringBuilder name = new StringBuilder();
for (int i = 0; i < 20; i++) {
name.append('a');
}
DirCacheEntry previous = new DirCacheEntry(name.toString());
for (int j = 0; j < 20; j++) {
name.setLength(name.length() - 1);
String newName = name.toString() + "bbb";
checkPath(DirCacheVersion.DIRC_VERSION_PATHCOMPRESS, previous,
newName);
}
}
@SuppressWarnings("unused")
@Test
public void testCreate_ByStringPath() {
assertEquals("a", new DirCacheEntry("a").getPathString());
assertEquals("a/b", new DirCacheEntry("a/b").getPathString());
try {
new DirCacheEntry("/a");
fail("Incorrectly created DirCacheEntry");
} catch (IllegalArgumentException err) {
assertEquals("Invalid path: /a", err.getMessage());
}
}
@SuppressWarnings("unused")
@Test
public void testCreate_ByStringPathAndStage() {
DirCacheEntry e;
e = new DirCacheEntry("a", 0);
assertEquals("a", e.getPathString());
assertEquals(0, e.getStage());
e = new DirCacheEntry("a/b", 1);
assertEquals("a/b", e.getPathString());
assertEquals(1, e.getStage());
e = new DirCacheEntry("a/c", 2);
assertEquals("a/c", e.getPathString());
assertEquals(2, e.getStage());
e = new DirCacheEntry("a/d", 3);
assertEquals("a/d", e.getPathString());
assertEquals(3, e.getStage());
try {
new DirCacheEntry("/a", 1);
fail("Incorrectly created DirCacheEntry");
} catch (IllegalArgumentException err) {
assertEquals("Invalid path: /a", err.getMessage());
}
try {
new DirCacheEntry("a", -11);
fail("Incorrectly created DirCacheEntry");
} catch (IllegalArgumentException err) {
assertEquals("Invalid stage -11 for path a", err.getMessage());
}
try {
new DirCacheEntry("a", 4);
fail("Incorrectly created DirCacheEntry");
} catch (IllegalArgumentException err) {
assertEquals("Invalid stage 4 for path a", err.getMessage());
}
}
@Test
public void testSetFileMode() {
final DirCacheEntry e = new DirCacheEntry("a");
assertEquals(0, e.getRawMode());
e.setFileMode(FileMode.REGULAR_FILE);
assertSame(FileMode.REGULAR_FILE, e.getFileMode());
assertEquals(FileMode.REGULAR_FILE.getBits(), e.getRawMode());
e.setFileMode(FileMode.EXECUTABLE_FILE);
assertSame(FileMode.EXECUTABLE_FILE, e.getFileMode());
assertEquals(FileMode.EXECUTABLE_FILE.getBits(), e.getRawMode());
e.setFileMode(FileMode.SYMLINK);
assertSame(FileMode.SYMLINK, e.getFileMode());
assertEquals(FileMode.SYMLINK.getBits(), e.getRawMode());
e.setFileMode(FileMode.GITLINK);
assertSame(FileMode.GITLINK, e.getFileMode());
assertEquals(FileMode.GITLINK.getBits(), e.getRawMode());
try {
e.setFileMode(FileMode.MISSING);
fail("incorrectly accepted FileMode.MISSING");
} catch (IllegalArgumentException err) {
assertEquals("Invalid mode 0 for path a", err.getMessage());
}
try {
e.setFileMode(FileMode.TREE);
fail("incorrectly accepted FileMode.TREE");
} catch (IllegalArgumentException err) {
assertEquals("Invalid mode 40000 for path a", err.getMessage());
}
}
@Test
public void testSetStage() {
DirCacheEntry e = new DirCacheEntry("some/path", DirCacheEntry.STAGE_1);
e.setAssumeValid(true);
e.setCreationTime(2L);
e.setFileMode(FileMode.EXECUTABLE_FILE);
e.setLastModified(EPOCH.plusMillis(3L));
e.setLength(100L);
e.setObjectId(ObjectId
.fromString("0123456789012345678901234567890123456789"));
e.setUpdateNeeded(true);
e.setStage(DirCacheEntry.STAGE_2);
assertTrue(e.isAssumeValid());
assertEquals(2L, e.getCreationTime());
assertEquals(
ObjectId.fromString("0123456789012345678901234567890123456789"),
e.getObjectId());
assertEquals(FileMode.EXECUTABLE_FILE, e.getFileMode());
assertEquals(EPOCH.plusMillis(3L), e.getLastModifiedInstant());
assertEquals(100L, e.getLength());
assertEquals(DirCacheEntry.STAGE_2, e.getStage());
assertTrue(e.isUpdateNeeded());
assertEquals("some/path", e.getPathString());
e.setStage(DirCacheEntry.STAGE_0);
assertTrue(e.isAssumeValid());
assertEquals(2L, e.getCreationTime());
assertEquals(
ObjectId.fromString("0123456789012345678901234567890123456789"),
e.getObjectId());
assertEquals(FileMode.EXECUTABLE_FILE, e.getFileMode());
assertEquals(EPOCH.plusMillis(3L), e.getLastModifiedInstant());
assertEquals(100L, e.getLength());
assertEquals(DirCacheEntry.STAGE_0, e.getStage());
assertTrue(e.isUpdateNeeded());
assertEquals("some/path", e.getPathString());
}
@Test
public void testCopyMetaDataWithStage() {
copyMetaDataHelper(false);
}
@Test
public void testCopyMetaDataWithoutStage() {
copyMetaDataHelper(true);
}
private static void copyMetaDataHelper(boolean keepStage) {
DirCacheEntry e = new DirCacheEntry("some/path", DirCacheEntry.STAGE_2);
e.setAssumeValid(false);
e.setCreationTime(2L);
e.setFileMode(FileMode.EXECUTABLE_FILE);
e.setLastModified(EPOCH.plusMillis(3L));
e.setLength(100L);
e.setObjectId(ObjectId
.fromString("0123456789012345678901234567890123456789"));
e.setUpdateNeeded(true);
DirCacheEntry f = new DirCacheEntry("someother/path",
DirCacheEntry.STAGE_1);
f.setAssumeValid(true);
f.setCreationTime(10L);
f.setFileMode(FileMode.SYMLINK);
f.setLastModified(EPOCH.plusMillis(20L));
f.setLength(100000000L);
f.setObjectId(ObjectId
.fromString("1234567890123456789012345678901234567890"));
f.setUpdateNeeded(true);
e.copyMetaData(f, keepStage);
assertTrue(e.isAssumeValid());
assertEquals(10L, e.getCreationTime());
assertEquals(
ObjectId.fromString("1234567890123456789012345678901234567890"),
e.getObjectId());
assertEquals(FileMode.SYMLINK, e.getFileMode());
assertEquals(EPOCH.plusMillis(20L), e.getLastModifiedInstant());
assertEquals(100000000L, e.getLength());
if (keepStage)
assertEquals(DirCacheEntry.STAGE_2, e.getStage());
else
assertEquals(DirCacheEntry.STAGE_1, e.getStage());
assertTrue(e.isUpdateNeeded());
assertEquals("some/path", e.getPathString());
}
}
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