/*
    * 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,
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   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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  package org.eclipse.jgit.internal.storage.file;
  
  import static org.junit.Assert.assertTrue;
  
  import java.util.Collections;
  
  import org.eclipse.jgit.junit.TestRepository.CommitBuilder;
  import org.eclipse.jgit.lib.ObjectId;
  import org.eclipse.jgit.lib.RefUpdate;
  import org.eclipse.jgit.merge.MergeStrategy;
  import org.eclipse.jgit.merge.Merger;
  import org.eclipse.jgit.revwalk.RevCommit;
  import org.eclipse.jgit.revwalk.RevTree;
  import org.junit.Test;
  
  public class GcBranchPrunedTest extends GcTestCase {
  
  	@Test
  	public void branch_historyNotPruned() throws Exception {
  		RevCommit tip = commitChain(10);
  		tr.branch("b").update(tip);
  		gc.setExpireAgeMillis(0);
  		fsTick();
  		gc.prune(Collections.<ObjectId> emptySet());
  		do {
  			assertTrue(repo.hasObject(tip));
  			tr.parseBody(tip);
  			RevTree t = tip.getTree();
  			assertTrue(repo.hasObject(t));
  			assertTrue(repo.hasObject(tr.get(t, "a")));
  			tip = tip.getParentCount() > 0 ? tip.getParent(0) : null;
  		} while (tip != null);
  	}
  
  	@Test
  	public void deleteBranch_historyPruned() throws Exception {
  		RevCommit tip = commitChain(10);
  		tr.branch("b").update(tip);
  		RefUpdate update = repo.updateRef("refs/heads/b");
  		update.setForceUpdate(true);
  		update.delete();
  		gc.setExpireAgeMillis(0);
  		fsTick();
  		gc.prune(Collections.<ObjectId> emptySet());
  		assertTrue(gc.getStatistics().numberOfLooseObjects == 0);
  	}
  
  	@Test
  	public void deleteMergedBranch_historyNotPruned() throws Exception {
  		RevCommit parent = tr.commit().create();
  		RevCommit b1Tip = tr.branch("b1").commit().parent(parent).add("x", "x")
  				.create();
  		RevCommit b2Tip = tr.branch("b2").commit().parent(parent).add("y", "y")
  				.create();
  
  		// merge b1Tip and b2Tip and update refs/heads/b1 to the merge commit
 		Merger merger = MergeStrategy.SIMPLE_TWO_WAY_IN_CORE.newMerger(repo);
 		merger.merge(b1Tip, b2Tip);
 		CommitBuilder cb = tr.commit();
 		cb.parent(b1Tip).parent(b2Tip);
 		cb.setTopLevelTree(merger.getResultTreeId());
 		RevCommit mergeCommit = cb.create();
 		RefUpdate u = repo.updateRef("refs/heads/b1");
 		u.setNewObjectId(mergeCommit);
 		u.update();
 
 		RefUpdate update = repo.updateRef("refs/heads/b2");
 		update.setForceUpdate(true);
 		update.delete();
 
 		gc.setExpireAgeMillis(0);
 		fsTick();
 		gc.prune(Collections.<ObjectId> emptySet());
 		assertTrue(repo.hasObject(b2Tip));
 	}
 }