Test file for CommitBuilder.java in jgit

CommitBuilderTest.java

/*
 * Copyright (C) 2011, Abhishek Bhatnagar <abhatnag@redhat.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,
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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package org.eclipse.jgit.lib;

/*
 * USE CASE:
 * A commit already exists in the git repo.
 * I want to create another commit using CommitBuilder
 * The following does not work
 */

import static org.junit.Assert.assertTrue;

import java.util.LinkedList;
import java.util.List;

import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.Status;
import org.eclipse.jgit.dircache.DirCache;
import org.junit.Before;
import org.junit.Test;

public class CommitBuilderTest extends RepositoryTestCase {
	private Git git;

	@Before
	public void setUp() throws Exception {
		super.setUp();
		git = new Git(db);

		// create test files
		writeTrashFile("File1.txt", "commit me");
		writeTrashFile("File2.txt", "commit me");

		// add first file
		git.add().addFilepattern("File1.txt").call();
		git.commit().setMessage("Test file commit").call();
	}

	@Test
	public void testStash() {
		try {
			// repo, index, odi, indextree && headcommitid
			Repository repo = git.getRepository();
			DirCache index = repo.lockDirCache();
			ObjectInserter odi = repo.newObjectInserter();
			ObjectId indexTreeId = index.writeTree(odi);
			List<ObjectId> parents = new LinkedList<ObjectId>();
			ObjectId headCommitId = repo.resolve(Constants.HEAD + "^{commit}");

			System.out.println(headCommitId);

			// get parents
			parents.add(0, headCommitId);

			// create a commit object, populate it and write it
			CommitBuilder newCommit = new CommitBuilder();
			newCommit.setCommitter(committer);
			newCommit.setAuthor(author);
			newCommit.setMessage("commiting test file");
			newCommit.setParentIds(parents);
			newCommit.setTreeId(indexTreeId);

			// insert commit
			ObjectId newHead = odi.insert(newCommit);
			odi.flush();


			RefUpdate ru = repo.updateRef(Constants.R_STASH);
			ru.setNewObjectId(newHead);
                        Result rc = ru.forceUpdate();

			// actual test
			Status status = git.status().call();
			assertTrue(status.getUntracked().size() == 0);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}