/*
    * Copyright (C) 2012, Christian Halstrick <christian.halstrick@sap.com>
    * and other copyright owners as documented in the project's IP log.
    *
    * This program and the accompanying materials are made available
    * under the terms of the Eclipse Distribution License v1.0 which
    * accompanies this distribution, is reproduced below, and is
    * available at http://www.eclipse.org/org/documents/edl-v10.php
    *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or
   * without modification, are permitted provided that the following
   * conditions are met:
   *
   * - Redistributions of source code must retain the above copyright
   *   notice, this list of conditions and the following disclaimer.
   *
   * - Redistributions in binary form must reproduce the above
   *   copyright notice, this list of conditions and the following
   *   disclaimer in the documentation and/or other materials provided
   *   with the distribution.
   *
   * - Neither the name of the Eclipse Foundation, Inc. nor the
   *   names of its contributors may be used to endorse or promote
   *   products derived from this software without specific prior
   *   written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
   * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package org.eclipse.jgit.internal.storage.file;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  import java.io.File;
  import java.util.Iterator;
  
  import org.eclipse.jgit.internal.storage.file.PackIndex.MutableEntry;
  import org.eclipse.jgit.junit.TestRepository.BranchBuilder;
  import org.junit.Test;
  
  public class GcKeepFilesTest extends GcTestCase {
  	@Test
  	public void testKeepFiles() throws Exception {
  		BranchBuilder bb = tr.branch("refs/heads/master");
  		bb.commit().add("A", "A").add("B", "B").create();
  		stats = gc.getStatistics();
  		assertEquals(4, stats.numberOfLooseObjects);
  		assertEquals(0, stats.numberOfPackedObjects);
  		assertEquals(0, stats.numberOfPackFiles);
  		gc.gc();
  		stats = gc.getStatistics();
  		assertEquals(0, stats.numberOfLooseObjects);
  		assertEquals(4, stats.numberOfPackedObjects);
  		assertEquals(1, stats.numberOfPackFiles);
  
  		Iterator<PackFile> packIt = repo.getObjectDatabase().getPacks()
  				.iterator();
  		PackFile singlePack = packIt.next();
  		assertFalse(packIt.hasNext());
  		File keepFile = new File(singlePack.getPackFile().getPath() + ".keep");
  		assertFalse(keepFile.exists());
  		assertTrue(keepFile.createNewFile());
  		bb.commit().add("A", "A2").add("B", "B2").create();
  		stats = gc.getStatistics();
  		assertEquals(4, stats.numberOfLooseObjects);
  		assertEquals(4, stats.numberOfPackedObjects);
  		assertEquals(1, stats.numberOfPackFiles);
  		gc.gc();
  		stats = gc.getStatistics();
  		assertEquals(0, stats.numberOfLooseObjects);
  		assertEquals(8, stats.numberOfPackedObjects);
  		assertEquals(2, stats.numberOfPackFiles);
  
  		// check that no object is packed twice
  		Iterator<PackFile> packs = repo.getObjectDatabase().getPacks()
  				.iterator();
  		PackIndex ind1 = packs.next().getIndex();
  		assertEquals(4, ind1.getObjectCount());
  		PackIndex ind2 = packs.next().getIndex();
  		assertEquals(4, ind2.getObjectCount());
  		for (MutableEntry e: ind1)
  			if (ind2.hasObject(e.toObjectId()))
  				assertFalse(
 						"the following object is in both packfiles: "
 								+ e.toObjectId(),
 						ind2.hasObject(e.toObjectId()));
 	}
 }