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package com.keuin.kbackupfabric.backup.incremental.manager;
import com.keuin.kbackupfabric.backup.incremental.ObjectCollection2;
import com.keuin.kbackupfabric.backup.incremental.ObjectCollectionFactory;
import com.keuin.kbackupfabric.backup.incremental.ObjectCollectionIterator;
import com.keuin.kbackupfabric.backup.incremental.identifier.ObjectIdentifier;
import com.keuin.kbackupfabric.backup.incremental.identifier.Sha256Identifier;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.*;
import java.util.stream.Stream;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
public class IncrementalBackupStorageManagerTest {
private static final String testRoot = "testfile/IncrementalBackupStorageManagerTest";
private static final String srcRoot = testRoot + "/src";
private static final String destRoot = testRoot + "/dest";
private final Map<String, ObjectIdentifier> files = new HashMap<>();
private static void deleteDirectoryTree(Path directory) throws IOException {
if (!directory.toFile().exists())
return;
if (!directory.toFile().isDirectory() && !directory.toFile().delete())
throw new IOException("failed to delete file " + directory);
Files.walkFileTree(directory, new SimpleFileVisitor<Path>() {
@Override
public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
Files.delete(file);
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
Files.delete(dir);
return FileVisitResult.CONTINUE;
}
});
}
private static ObjectIdentifier addFile(String fileName) throws IOException {
final File root = new File(srcRoot);
final File dest = new File(root, fileName);
final Random rnd = new Random();
if (dest.exists()) {
deleteDirectoryTree(dest.toPath());
}
try (FileOutputStream fos = new FileOutputStream(dest)) {
fos.write(rnd.nextInt());
}
return Sha256Identifier.fromFile(dest);
}
private static void randomlyDeleteFiles(int count) throws IOException {
if (count == 0)
return;
if (count < 0)
throw new IllegalArgumentException("negative count");
int[] c = new int[]{0};
Random rnd = new Random();
try (Stream<Path> walk = Files.walk(new File(srcRoot).toPath(), 1)) {
walk.map(p -> rnd.nextBoolean() ? p : null)
.filter(Objects::nonNull)
.forEach(p -> {
if (c[0]++ != count) {
if (!p.toFile().delete() && p.toFile().isFile())
throw new RuntimeException("Failed to delete file " + p);
}
});
}
}
private static String getRandomString(int length) {
String str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
Random random = new Random();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < length; i++) {
int number = random.nextInt(62);
sb.append(str.charAt(number));
}
return sb.toString();
}
@Before
public void initialize() throws IOException {
// init directory structure
final File rootFile = new File(testRoot);
deleteDirectoryTree(rootFile.toPath());
assertTrue(rootFile.mkdir());
assertTrue(new File(srcRoot).mkdir());
assertTrue(new File(destRoot).mkdir());
assertTrue(rootFile.isDirectory());
assertTrue(new File(srcRoot).isDirectory());
assertTrue(new File(destRoot).isDirectory());
// add some random files
files.clear();
for (int i = 0; i < 100; i++) {
String fileName = getRandomString(20);
files.put(fileName, addFile(fileName));
}
}
@After
public void clean() throws IOException {
deleteDirectoryTree(new File(testRoot).toPath());
}
@Test
public void testDeleteAll() throws IOException {
ObjectCollection2 col = new ObjectCollectionFactory<>(Sha256Identifier::fromFile,
1, 1)
.fromDirectory(new File(srcRoot));
IncrementalBackupStorageManager manager =
new IncrementalBackupStorageManager(new File(destRoot).toPath());
manager.addObjectCollection(col, new File(srcRoot));
assertTrue(manager.contains(col));
manager.deleteObjectCollection(col);
new ObjectCollectionIterator(col).forEachRemaining(
ele -> assertFalse(manager.contains(ele.getIdentifier())));
}
@Test
public void testDeleteNone() throws IOException {
ObjectCollection2 col = new ObjectCollectionFactory<>(Sha256Identifier::fromFile,
1, 1)
.fromDirectory(new File(srcRoot));
IncrementalBackupStorageManager manager =
new IncrementalBackupStorageManager(new File(destRoot).toPath());
manager.addObjectCollection(col, new File(srcRoot));
assertTrue(manager.contains(col));
manager.deleteObjectCollection(col, Collections.singleton(col));
new ObjectCollectionIterator(col).forEachRemaining(
ele -> assertTrue(manager.contains(ele.getIdentifier())));
}
@Test
public void testDeleteSub() throws IOException {
// create partial collection
ObjectCollection2 col = new ObjectCollectionFactory<>(Sha256Identifier::fromFile,
1, 1)
.fromDirectory(new File(srcRoot));
IncrementalBackupStorageManager manager =
new IncrementalBackupStorageManager(new File(destRoot).toPath());
manager.addObjectCollection(col, new File(srcRoot));
assertTrue(manager.contains(col));
manager.deleteObjectCollection(col);
new ObjectCollectionIterator(col).forEachRemaining(
ele -> assertFalse(manager.contains(ele.getIdentifier())));
// expand
randomlyDeleteFiles(25);
for (int i = 0; i < 50; i++) {
String fileName = getRandomString(20);
files.put(fileName, addFile(fileName));
}
ObjectCollection2 col2 = new ObjectCollectionFactory<>(Sha256Identifier::fromFile,
1, 1)
.fromDirectory(new File(srcRoot));
manager.addObjectCollection(col2, new File(srcRoot));
manager.deleteObjectCollection(col, Collections.singleton(col2));
assertTrue(manager.contains(col2));
}
@Test
public void testDeleteSuper() throws IOException {
// create partial collection
ObjectCollection2 col = new ObjectCollectionFactory<>(Sha256Identifier::fromFile,
1, 1)
.fromDirectory(new File(srcRoot));
IncrementalBackupStorageManager manager =
new IncrementalBackupStorageManager(new File(destRoot).toPath());
manager.addObjectCollection(col, new File(srcRoot));
assertTrue(manager.contains(col));
manager.deleteObjectCollection(col);
new ObjectCollectionIterator(col).forEachRemaining(
ele -> assertFalse(manager.contains(ele.getIdentifier())));
// expand
for (int i = 0; i < 50; i++) {
String fileName = getRandomString(20);
files.put(fileName, addFile(fileName));
}
ObjectCollection2 col2 = new ObjectCollectionFactory<>(Sha256Identifier::fromFile,
1, 1)
.fromDirectory(new File(srcRoot));
manager.addObjectCollection(col2, new File(srcRoot));
manager.deleteObjectCollection(col2, Collections.singleton(col));
assertTrue(manager.contains(col));
}
}
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