/*
    * Copyright (C) 2012, 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.internal.storage.file;
  
  import static org.junit.Assert.assertEquals;
  
  import org.eclipse.jgit.internal.storage.file.BasePackBitmapIndex.StoredBitmap;
  import org.eclipse.jgit.lib.ObjectId;
  import org.junit.Test;
  
  import com.googlecode.javaewah.EWAHCompressedBitmap;
  
  public class StoredBitmapTest {
  
  	@Test
  	public void testGetBitmapWithoutXor() {
  		EWAHCompressedBitmap b = bitmapOf(100);
  		StoredBitmap sb = newStoredBitmap(bitmapOf(100));
  		assertEquals(b, sb.getBitmap());
  	}
  
  	@Test
  	public void testGetBitmapWithOneXor() {
  		StoredBitmap sb = newStoredBitmap(bitmapOf(100), bitmapOf(100, 101));
  		assertEquals(bitmapOf(101), sb.getBitmap());
  	}
  
  	@Test
  	public void testGetBitmapWithThreeXor() {
  		StoredBitmap sb = newStoredBitmap(
  				bitmapOf(100),
  				bitmapOf(90, 101),
  				bitmapOf(100, 101),
  				bitmapOf(50));
  		assertEquals(bitmapOf(50, 90), sb.getBitmap());
  		assertEquals(bitmapOf(50, 90), sb.getBitmap());
  	}
  
  	private static final StoredBitmap newStoredBitmap(
  			EWAHCompressedBitmap... bitmaps) {
  		StoredBitmap sb = null;
  		for (EWAHCompressedBitmap bitmap : bitmaps)
  			sb = new StoredBitmap(ObjectId.zeroId(), bitmap, sb, 0);
  		return sb;
  	}
  
  	private static final EWAHCompressedBitmap bitmapOf(int... bits) {
  		EWAHCompressedBitmap b = new EWAHCompressedBitmap();
  		for (int bit : bits)
  			b.set(bit);
  		return b;
  	}
  }