/*
    * Copyright (C) 2016 Google Inc.
    * 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
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  package org.eclipse.jgit.internal.storage.reftree;
  
  import static org.eclipse.jgit.lib.Constants.HEAD;
  import static org.eclipse.jgit.lib.Constants.MASTER;
  import static org.eclipse.jgit.lib.Constants.ORIG_HEAD;
  import static org.eclipse.jgit.lib.Constants.R_HEADS;
  import static org.eclipse.jgit.lib.RefDatabase.ALL;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.List;
  
  import org.eclipse.jgit.internal.storage.file.FileRepository;
  import org.eclipse.jgit.junit.LocalDiskRepositoryTestCase;
  import org.eclipse.jgit.junit.TestRepository;
  import org.eclipse.jgit.lib.ObjectId;
  import org.eclipse.jgit.lib.Ref;
  import org.eclipse.jgit.lib.RefDatabase;
  import org.eclipse.jgit.lib.RefUpdate;
  import org.eclipse.jgit.revwalk.RevCommit;
  import org.eclipse.jgit.storage.file.FileBasedConfig;
  import org.eclipse.jgit.storage.file.FileRepositoryBuilder;
  import org.junit.Before;
  import org.junit.Test;
  
  public class LocalDiskRefTreeDatabaseTest extends LocalDiskRepositoryTestCase {
  	private FileRepository repo;
  	private RefTreeDatabase refdb;
  	private RefDatabase bootstrap;
  
  	private TestRepository<FileRepository> testRepo;
  	private RevCommit A;
  	private RevCommit B;
  
  	@Override
  	@Before
  	public void setUp() throws Exception {
  		FileRepository init = createWorkRepository();
  		FileBasedConfig cfg = init.getConfig();
  		cfg.setInt("core", null, "repositoryformatversion", 1);
  		cfg.setString("extensions", null, "refsStorage", "reftree");
  		cfg.save();
  
  		repo = (FileRepository) new FileRepositoryBuilder()
  				.setGitDir(init.getDirectory())
  				.build();
  		refdb = (RefTreeDatabase) repo.getRefDatabase();
  		bootstrap = refdb.getBootstrap();
  		addRepoToClose(repo);
  
  		RefUpdate head = refdb.newUpdate(HEAD, true);
  		head.link(R_HEADS + MASTER);
  
  		testRepo = new TestRepository<>(init);
 		A = testRepo.commit().create();
 		B = testRepo.commit(testRepo.getRevWalk().parseCommit(A));
 	}
 
 	@Test
 	public void testHeadOrigHead() throws IOException {
 		RefUpdate master = refdb.newUpdate(HEAD, false);
 		master.setExpectedOldObjectId(ObjectId.zeroId());
 		master.setNewObjectId(A);
 		assertEquals(RefUpdate.Result.NEW, master.update());
 		assertEquals(A, refdb.exactRef(HEAD).getObjectId());
 
 		RefUpdate orig = refdb.newUpdate(ORIG_HEAD, true);
 		orig.setNewObjectId(B);
 		assertEquals(RefUpdate.Result.NEW, orig.update());
 
 		File origFile = new File(repo.getDirectory(), ORIG_HEAD);
 		assertEquals(B.name() + '\n', read(origFile));
 		assertEquals(B, bootstrap.exactRef(ORIG_HEAD).getObjectId());
 		assertEquals(B, refdb.exactRef(ORIG_HEAD).getObjectId());
 		assertFalse(refdb.getRefs(ALL).containsKey(ORIG_HEAD));
 
 		List<Ref> addl = refdb.getAdditionalRefs();
 		assertEquals(2, addl.size());
 		assertEquals(ORIG_HEAD, addl.get(1).getName());
 		assertEquals(B, addl.get(1).getObjectId());
 	}
 }