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/*
* Copyright (c) 2023, 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
* http://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.assertEquals;
import static org.junit.Assert.assertTrue;
import org.eclipse.jgit.internal.storage.file.BasePackBitmapIndex.StoredBitmap;
import org.eclipse.jgit.lib.AnyObjectId;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectIdOwnerMap;
import org.junit.Before;
import org.junit.Test;
import com.googlecode.javaewah.EWAHCompressedBitmap;
public class BasePackBitmapIndexTest {
private ObjectId baseOid;
private StoredBitmap baseBitmap;
private ObjectId xorOid;
private StoredBitmap xorBitmap;
private ObjectIdOwnerMap<StoredBitmap> bitmaps;
@Before
public void setUp() {
baseOid = ObjectId
.fromString("c46f36f2bfc96d6d6f75bd71ee33625293aee690");
baseBitmap = newBaseStoredBitmap(baseOid, bitmapOf(100));
xorOid = ObjectId
.fromString("52c18ae15f8fa3787f920e68791367dae2e1af2d");
xorBitmap = newXorStoredBitmap(xorOid, bitmapOf(200, 300), baseBitmap);
bitmaps = new ObjectIdOwnerMap<>();
bitmaps.add(baseBitmap);
bitmaps.add(xorBitmap);
}
@Test
public void testBitmapCounts() {
TestPackBitmapIndex index = new TestPackBitmapIndex(bitmaps);
assertEquals(1, index.getBaseBitmapCount());
assertEquals(1, index.getXorBitmapCount());
assertEquals(2, index.getBitmapCount());
}
@Test
public void testBitmapCounts_xorResolved() {
TestPackBitmapIndex index = new TestPackBitmapIndex(bitmaps);
index.getBitmap(xorOid);
assertEquals(2, index.getBaseBitmapCount());
assertEquals(0, index.getXorBitmapCount());
assertEquals(2, index.getBitmapCount());
}
@Test
public void testBitmapSizes() {
TestPackBitmapIndex index = new TestPackBitmapIndex(bitmaps);
assertEquals(baseBitmap.getCurrentSizeInBytes(),
index.getBaseBitmapSizeInBytes());
assertEquals(xorBitmap.getCurrentSizeInBytes(),
index.getXorBitmapSizeInBytes());
}
@Test
public void testBitmapSizes_xorResolved() {
TestPackBitmapIndex index = new TestPackBitmapIndex(bitmaps);
index.getBitmap(xorOid);
assertTrue(baseBitmap.getCurrentSizeInBytes() < index
.getBaseBitmapSizeInBytes());
assertEquals(0, index.getXorBitmapSizeInBytes());
}
private static final StoredBitmap newBaseStoredBitmap(ObjectId oid,
EWAHCompressedBitmap base) {
return new StoredBitmap(oid, base, null, 0);
}
private static StoredBitmap newXorStoredBitmap(ObjectId oid,
EWAHCompressedBitmap xorMask, StoredBitmap base) {
return new StoredBitmap(oid, xorMask, base, 0);
}
private static final EWAHCompressedBitmap bitmapOf(int... bits) {
EWAHCompressedBitmap b = new EWAHCompressedBitmap();
for (int bit : bits)
b.set(bit);
return b;
}
private static class TestPackBitmapIndex extends BasePackBitmapIndex {
TestPackBitmapIndex(ObjectIdOwnerMap<StoredBitmap> bitmaps) {
super(bitmaps);
}
@Override
public int findPosition(AnyObjectId objectId) {
throw new IllegalStateException();
}
@Override
public ObjectId getObject(int position)
throws IllegalArgumentException {
throw new IllegalStateException();
}
@Override
public EWAHCompressedBitmap ofObjectType(EWAHCompressedBitmap bitmap,
int type) {
throw new IllegalStateException();
}
@Override
public int getObjectCount() {
throw new IllegalStateException();
}
@Override
public int getBitmapCount() {
return getBitmaps().size();
}
}
}
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