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/*
* Copyright (C) 2012, 2021 GitHub 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.file;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertThrows;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.File;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.JGitInternalException;
import org.eclipse.jgit.errors.LockFailedException;
import org.eclipse.jgit.junit.RepositoryTestCase;
import org.eclipse.jgit.revwalk.RevCommit;
import org.junit.Test;
/**
* Unit tests of {@link LockFile}
*/
public class LockFileTest extends RepositoryTestCase {
@Test
public void lockFailedExceptionRecovery() throws Exception {
try (Git git = new Git(db)) {
writeTrashFile("file.txt", "content");
git.add().addFilepattern("file.txt").call();
RevCommit commit1 = git.commit().setMessage("create file").call();
assertNotNull(commit1);
writeTrashFile("file.txt", "content2");
git.add().addFilepattern("file.txt").call();
assertNotNull(git.commit().setMessage("edit file").call());
LockFile lf = new LockFile(db.getIndexFile());
assertTrue(lf.lock());
try {
git.checkout().setName(commit1.name()).call();
fail("JGitInternalException not thrown");
} catch (JGitInternalException e) {
assertTrue(e.getCause() instanceof LockFailedException);
lf.unlock();
git.checkout().setName(commit1.name()).call();
}
}
}
@Test
public void testLockTwice() throws Exception {
File f = writeTrashFile("somefile", "content");
LockFile lock = new LockFile(f);
assertTrue(lock.lock());
lock.write("other".getBytes(StandardCharsets.US_ASCII));
lock.commit();
assertFalse(lock.isLocked());
checkFile(f, "other");
assertTrue(lock.lock());
assertTrue(lock.isLocked());
try (OutputStream out = lock.getOutputStream()) {
out.write("second".getBytes(StandardCharsets.US_ASCII));
}
lock.commit();
assertFalse(lock.isLocked());
checkFile(f, "second");
}
@Test
public void testLockTwiceUnlock() throws Exception {
File f = writeTrashFile("somefile", "content");
LockFile lock = new LockFile(f);
assertTrue(lock.lock());
assertTrue(lock.isLocked());
lock.write("other".getBytes(StandardCharsets.US_ASCII));
lock.unlock();
assertFalse(lock.isLocked());
checkFile(f, "content");
assertTrue(lock.lock());
assertTrue(lock.isLocked());
try (OutputStream out = lock.getOutputStream()) {
out.write("second".getBytes(StandardCharsets.US_ASCII));
}
lock.commit();
assertFalse(lock.isLocked());
checkFile(f, "second");
}
@Test
public void testLockWriteTwiceThrows1() throws Exception {
File f = writeTrashFile("somefile", "content");
LockFile lock = new LockFile(f);
assertTrue(lock.lock());
assertTrue(lock.isLocked());
lock.write("other".getBytes(StandardCharsets.US_ASCII));
assertThrows(Exception.class,
() -> lock.write("second".getBytes(StandardCharsets.US_ASCII)));
lock.unlock();
}
@Test
public void testLockWriteTwiceThrows2() throws Exception {
File f = writeTrashFile("somefile", "content");
LockFile lock = new LockFile(f);
assertTrue(lock.lock());
assertTrue(lock.isLocked());
try (OutputStream out = lock.getOutputStream()) {
out.write("other".getBytes(StandardCharsets.US_ASCII));
}
assertThrows(Exception.class,
() -> lock.write("second".getBytes(StandardCharsets.US_ASCII)));
lock.unlock();
}
@Test
public void testLockWriteTwiceThrows3() throws Exception {
File f = writeTrashFile("somefile", "content");
LockFile lock = new LockFile(f);
assertTrue(lock.lock());
assertTrue(lock.isLocked());
lock.write("other".getBytes(StandardCharsets.US_ASCII));
assertThrows(Exception.class, () -> {
try (OutputStream out = lock.getOutputStream()) {
out.write("second".getBytes(StandardCharsets.US_ASCII));
}
});
lock.unlock();
}
@Test
public void testLockWriteTwiceThrows4() throws Exception {
File f = writeTrashFile("somefile", "content");
LockFile lock = new LockFile(f);
assertTrue(lock.lock());
assertTrue(lock.isLocked());
try (OutputStream out = lock.getOutputStream()) {
out.write("other".getBytes(StandardCharsets.US_ASCII));
}
assertThrows(Exception.class, () -> {
try (OutputStream out = lock.getOutputStream()) {
out.write("second".getBytes(StandardCharsets.US_ASCII));
}
});
lock.unlock();
}
@Test
public void testLockUnclosedCommitThrows() throws Exception {
File f = writeTrashFile("somefile", "content");
LockFile lock = new LockFile(f);
assertTrue(lock.lock());
assertTrue(lock.isLocked());
try (OutputStream out = lock.getOutputStream()) {
out.write("other".getBytes(StandardCharsets.US_ASCII));
assertThrows(Exception.class, () -> lock.commit());
}
}
@Test
public void testLockNested() throws Exception {
File f = writeTrashFile("somefile", "content");
LockFile lock = new LockFile(f);
assertTrue(lock.lock());
assertTrue(lock.isLocked());
assertThrows(IllegalStateException.class, () -> lock.lock());
assertTrue(lock.isLocked());
lock.unlock();
}
@Test
public void testLockHeld() throws Exception {
File f = writeTrashFile("somefile", "content");
LockFile lock = new LockFile(f);
assertTrue(lock.lock());
assertTrue(lock.isLocked());
LockFile lock2 = new LockFile(f);
assertFalse(lock2.lock());
assertFalse(lock2.isLocked());
assertTrue(lock.isLocked());
lock.unlock();
}
@Test
public void testLockForAppend() throws Exception {
File f = writeTrashFile("somefile", "content");
LockFile lock = new LockFile(f);
assertTrue(lock.lockForAppend());
assertTrue(lock.isLocked());
lock.write("other".getBytes(StandardCharsets.US_ASCII));
lock.commit();
assertFalse(lock.isLocked());
checkFile(f, "contentother");
}
@Test
public void testUnlockNoop() throws Exception {
File f = writeTrashFile("somefile", "content");
try {
LockFile lock = new LockFile(f);
lock.unlock();
lock.unlock();
} catch (Throwable e) {
throw new AssertionError(
"unlock should be noop if not locked at all.", e);
}
}
}
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