org.eclipse.jgit.test/tst/org/eclipse/jgit/api/RevertCommandTest.java - jgit - Git at Google

 /*
  * Copyright (C) 2011, Robin Rosenberg
  * 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.api;

 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;

 import java.io.File;
 import java.io.IOException;
 import java.util.Iterator;

 import org.eclipse.jgit.api.MergeResult.MergeStatus;
 import org.eclipse.jgit.api.ResetCommand.ResetType;
 import org.eclipse.jgit.api.errors.GitAPIException;
 import org.eclipse.jgit.api.errors.JGitInternalException;
 import org.eclipse.jgit.dircache.DirCache;
 import org.eclipse.jgit.junit.RepositoryTestCase;
 import org.eclipse.jgit.lib.ConfigConstants;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.FileMode;
 import org.eclipse.jgit.lib.ReflogReader;
 import org.eclipse.jgit.lib.RepositoryState;
 import org.eclipse.jgit.merge.ResolveMerger.MergeFailureReason;
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.junit.Test;

 /**
  * Test revert command
  */
 public class RevertCommandTest extends RepositoryTestCase {
 	@Test
 	public void testRevert() throws IOException, JGitInternalException,
 			GitAPIException {
 		try (Git git = new Git(db)) {
 			writeTrashFile("a", "first line\nsec. line\nthird line\n");
 			git.add().addFilepattern("a").call();
 			git.commit().setMessage("create a").call();

 			writeTrashFile("b", "content\n");
 			git.add().addFilepattern("b").call();
 			git.commit().setMessage("create b").call();

 			writeTrashFile("a", "first line\nsec. line\nthird line\nfourth line\n");
 			git.add().addFilepattern("a").call();
 			git.commit().setMessage("enlarged a").call();

 			writeTrashFile("a",
 					"first line\nsecond line\nthird line\nfourth line\n");
 			git.add().addFilepattern("a").call();
 			RevCommit fixingA = git.commit().setMessage("fixed a").call();

 			writeTrashFile("b", "first line\n");
 			git.add().addFilepattern("b").call();
 			git.commit().setMessage("fixed b").call();

 			git.revert().include(fixingA).call();

 			assertEquals(RepositoryState.SAFE, db.getRepositoryState());

 			assertTrue(new File(db.getWorkTree(), "b").exists());
 			checkFile(new File(db.getWorkTree(), "a"),
 					"first line\nsec. line\nthird line\nfourth line\n");
 			Iterator<RevCommit> history = git.log().call().iterator();
 			RevCommit revertCommit = history.next();
 			String expectedMessage = "Revert \"fixed a\"\n\n"
 					+ "This reverts commit " + fixingA.getId().getName() + ".\n";
 			assertEquals(expectedMessage, revertCommit.getFullMessage());
 			assertEquals("fixed b", history.next().getFullMessage());
 			assertEquals("fixed a", history.next().getFullMessage());
 			assertEquals("enlarged a", history.next().getFullMessage());
 			assertEquals("create b", history.next().getFullMessage());
 			assertEquals("create a", history.next().getFullMessage());
 			assertFalse(history.hasNext());

 			ReflogReader reader = db.getReflogReader(Constants.HEAD);
 			assertTrue(reader.getLastEntry().getComment()
 					.startsWith("revert: Revert \""));
 			reader = db.getReflogReader(db.getBranch());
 			assertTrue(reader.getLastEntry().getComment()
 					.startsWith("revert: Revert \""));
 		}

 	}

 	@Test
 	public void testRevertMultiple() throws IOException, JGitInternalException,
 			GitAPIException {
 		try (Git git = new Git(db)) {
 			writeTrashFile("a", "first\n");
 			git.add().addFilepattern("a").call();
 			git.commit().setMessage("add first").call();

 			writeTrashFile("a", "first\nsecond\n");
 			git.add().addFilepattern("a").call();
 			RevCommit secondCommit = git.commit().setMessage("add second").call();

 			writeTrashFile("a", "first\nsecond\nthird\n");
 			git.add().addFilepattern("a").call();
 			RevCommit thirdCommit = git.commit().setMessage("add third").call();

 			git.revert().include(thirdCommit).include(secondCommit).call();

 			assertEquals(RepositoryState.SAFE, db.getRepositoryState());

 			checkFile(new File(db.getWorkTree(), "a"), "first\n");
 			Iterator<RevCommit> history = git.log().call().iterator();
 			RevCommit revertCommit = history.next();
 			String expectedMessage = "Revert \"add second\"\n\n"
 					+ "This reverts commit "
 					+ secondCommit.getId().getName() + ".\n";
 			assertEquals(expectedMessage, revertCommit.getFullMessage());
 			revertCommit = history.next();
 			expectedMessage = "Revert \"add third\"\n\n"
 					+ "This reverts commit " + thirdCommit.getId().getName()
 					+ ".\n";
 			assertEquals(expectedMessage, revertCommit.getFullMessage());
 			assertEquals("add third", history.next().getFullMessage());
 			assertEquals("add second", history.next().getFullMessage());
 			assertEquals("add first", history.next().getFullMessage());
 			assertFalse(history.hasNext());

 			ReflogReader reader = db.getReflogReader(Constants.HEAD);
 			assertTrue(reader.getLastEntry().getComment()
 					.startsWith("revert: Revert \""));
 			reader = db.getReflogReader(db.getBranch());
 			assertTrue(reader.getLastEntry().getComment()
 					.startsWith("revert: Revert \""));
 		}

 	}

 	@Test
 	public void testRevertMultipleWithFail() throws IOException,
 			JGitInternalException, GitAPIException {
 		try (Git git = new Git(db)) {
 			writeTrashFile("a", "first\n");
 			git.add().addFilepattern("a").call();
 			git.commit().setMessage("add first").call();

 			writeTrashFile("a", "first\nsecond\n");
 			git.add().addFilepattern("a").call();
 			RevCommit secondCommit = git.commit().setMessage("add second").call();

 			writeTrashFile("a", "first\nsecond\nthird\n");
 			git.add().addFilepattern("a").call();
 			git.commit().setMessage("add third").call();

 			writeTrashFile("a", "first\nsecond\nthird\nfourth\n");
 			git.add().addFilepattern("a").call();
 			RevCommit fourthCommit = git.commit().setMessage("add fourth").call();

 			git.revert().include(fourthCommit).include(secondCommit).call();

 			// not SAFE because it failed
 			assertEquals(RepositoryState.REVERTING, db.getRepositoryState());

 			checkFile(new File(db.getWorkTree(), "a"), "first\n"
 					+ "<<<<<<< master\n" + "second\n" + "third\n" + "=======\n"
 					+ ">>>>>>> " + secondCommit.getId().abbreviate(7).name()
 					+ " add second\n");
 			Iterator<RevCommit> history = git.log().call().iterator();
 			RevCommit revertCommit = history.next();
 			String expectedMessage = "Revert \"add fourth\"\n\n"
 					+ "This reverts commit " + fourthCommit.getId().getName()
 					+ ".\n";
 			assertEquals(expectedMessage, revertCommit.getFullMessage());
 			assertEquals("add fourth", history.next().getFullMessage());
 			assertEquals("add third", history.next().getFullMessage());
 			assertEquals("add second", history.next().getFullMessage());
 			assertEquals("add first", history.next().getFullMessage());
 			assertFalse(history.hasNext());

 			ReflogReader reader = db.getReflogReader(Constants.HEAD);
 			assertTrue(reader.getLastEntry().getComment()
 					.startsWith("revert: Revert \""));
 			reader = db.getReflogReader(db.getBranch());
 			assertTrue(reader.getLastEntry().getComment()
 					.startsWith("revert: Revert \""));
 		}

 	}

 	@Test
 	public void testRevertDirtyIndex() throws Exception {
 		try (Git git = new Git(db)) {
 			RevCommit sideCommit = prepareRevert(git);

 			// modify and add file a
 			writeTrashFile("a", "a(modified)");
 			git.add().addFilepattern("a").call();
 			// do not commit

 			doRevertAndCheckResult(git, sideCommit,
 					MergeFailureReason.DIRTY_INDEX);
 		}
 }

 	@Test
 	public void testRevertDirtyWorktree() throws Exception {
 		try (Git git = new Git(db)) {
 			RevCommit sideCommit = prepareRevert(git);

 			// modify file a
 			writeTrashFile("a", "a(modified)");
 			// do not add and commit

 			doRevertAndCheckResult(git, sideCommit,
 					MergeFailureReason.DIRTY_WORKTREE);
 		}
 	}

 	@Test
 	public void testRevertConflictResolution() throws Exception {
 		try (Git git = new Git(db)) {
 			RevCommit sideCommit = prepareRevert(git);

 			RevertCommand revert = git.revert();
 			RevCommit newHead = revert.include(sideCommit.getId()).call();
 			assertNull(newHead);
 			MergeResult result = revert.getFailingResult();
 			assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());
 			assertTrue(new File(db.getDirectory(), Constants.MERGE_MSG).exists());
 			assertEquals("Revert \"" + sideCommit.getShortMessage()
 					+ "\"\n\nThis reverts commit " + sideCommit.getId().getName()
 					+ ".\n\nConflicts:\n\ta\n",
 					db.readMergeCommitMsg());
 			assertTrue(new File(db.getDirectory(), Constants.REVERT_HEAD)
 					.exists());
 			assertEquals(sideCommit.getId(), db.readRevertHead());
 			assertEquals(RepositoryState.REVERTING, db.getRepositoryState());

 			// Resolve
 			writeTrashFile("a", "a");
 			git.add().addFilepattern("a").call();

 			assertEquals(RepositoryState.REVERTING_RESOLVED,
 					db.getRepositoryState());

 			git.commit().setOnly("a").setMessage("resolve").call();

 			assertEquals(RepositoryState.SAFE, db.getRepositoryState());
 		}
 	}

 	@Test
 	public void testRevertkConflictReset() throws Exception {
 		try (Git git = new Git(db)) {
 			RevCommit sideCommit = prepareRevert(git);

 			RevertCommand revert = git.revert();
 			RevCommit newHead = revert.include(sideCommit.getId()).call();
 			assertNull(newHead);
 			MergeResult result = revert.getFailingResult();

 			assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());
 			assertEquals(RepositoryState.REVERTING, db.getRepositoryState());
 			assertTrue(new File(db.getDirectory(), Constants.REVERT_HEAD)
 					.exists());

 			git.reset().setMode(ResetType.MIXED).setRef("HEAD").call();

 			assertEquals(RepositoryState.SAFE, db.getRepositoryState());
 			assertFalse(new File(db.getDirectory(), Constants.REVERT_HEAD)
 					.exists());
 		}
 	}

 	@Test
 	public void testRevertOverExecutableChangeOnNonExectuableFileSystem()
 			throws Exception {
 		try (Git git = new Git(db)) {
 			File file = writeTrashFile("test.txt", "a");
 			assertNotNull(git.add().addFilepattern("test.txt").call());
 			assertNotNull(git.commit().setMessage("commit1").call());

 			assertNotNull(git.checkout().setCreateBranch(true).setName("a").call());

 			writeTrashFile("test.txt", "b");
 			assertNotNull(git.add().addFilepattern("test.txt").call());
 			RevCommit commit2 = git.commit().setMessage("commit2").call();
 			assertNotNull(commit2);

 			assertNotNull(git.checkout().setName(Constants.MASTER).call());

 			DirCache cache = db.lockDirCache();
 			cache.getEntry("test.txt").setFileMode(FileMode.EXECUTABLE_FILE);
 			cache.write();
 			assertTrue(cache.commit());
 			cache.unlock();

 			assertNotNull(git.commit().setMessage("commit3").call());

 			db.getFS().setExecute(file, false);
 			git.getRepository()
 					.getConfig()
 					.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
 							ConfigConstants.CONFIG_KEY_FILEMODE, false);

 			RevertCommand revert = git.revert();
 			RevCommit newHead = revert.include(commit2).call();
 			assertNotNull(newHead);
 		}
 	}

 	@Test
 	public void testRevertConflictMarkers() throws Exception {
 		try (Git git = new Git(db)) {
 			RevCommit sideCommit = prepareRevert(git);

 			RevertCommand revert = git.revert();
 			RevCommit newHead = revert.include(sideCommit.getId())
 					.call();
 			assertNull(newHead);
 			MergeResult result = revert.getFailingResult();
 			assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());

 			String expected = "<<<<<<< master\na(latest)\n=======\na\n>>>>>>> ca96c31 second master\n";
 			checkFile(new File(db.getWorkTree(), "a"), expected);
 		}
 	}

 	@Test
 	public void testRevertOurCommitName() throws Exception {
 		try (Git git = new Git(db)) {
 			RevCommit sideCommit = prepareRevert(git);

 			RevertCommand revert = git.revert();
 			RevCommit newHead = revert.include(sideCommit.getId())
 					.setOurCommitName("custom name").call();
 			assertNull(newHead);
 			MergeResult result = revert.getFailingResult();
 			assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());

 			String expected = "<<<<<<< custom name\na(latest)\n=======\na\n>>>>>>> ca96c31 second master\n";
 			checkFile(new File(db.getWorkTree(), "a"), expected);
 		}
 	}

 	private RevCommit prepareRevert(Git git) throws Exception {
 		// create, add and commit file a
 		writeTrashFile("a", "a");
 		git.add().addFilepattern("a").call();
 		git.commit().setMessage("first master").call();

 		// First commit
 		checkoutBranch("refs/heads/master");
 		// modify, add and commit file a
 		writeTrashFile("a", "a(previous)");
 		git.add().addFilepattern("a").call();
 		RevCommit oldCommit = git.commit().setMessage("second master").call();

 		// modify, add and commit file a
 		writeTrashFile("a", "a(latest)");
 		git.add().addFilepattern("a").call();
 		git.commit().setMessage("side").call();

 		return oldCommit;
 	}

 	private void doRevertAndCheckResult(final Git git,
 			final RevCommit sideCommit, final MergeFailureReason reason)
 			throws Exception {
 		// get current index state
 		String indexState = indexState(CONTENT);

 		// revert
 		RevertCommand revert = git.revert();
 		RevCommit resultCommit = revert.include(sideCommit.getId()).call();
 		assertNull(resultCommit);
 		MergeResult result = revert.getFailingResult();
 		assertEquals(MergeStatus.FAILED, result.getMergeStatus());
 		// staged file a causes DIRTY_INDEX
 		assertEquals(1, result.getFailingPaths().size());
 		assertEquals(reason, result.getFailingPaths().get("a"));
 		assertEquals("a(modified)", read(new File(db.getWorkTree(), "a")));
 		// index shall be unchanged
 		assertEquals(indexState, indexState(CONTENT));
 		assertEquals(RepositoryState.SAFE, db.getRepositoryState());

 		if (reason == null) {
 			ReflogReader reader = db.getReflogReader(Constants.HEAD);
 			assertTrue(reader.getLastEntry().getComment()
 					.startsWith("revert: "));
 			reader = db.getReflogReader(db.getBranch());
 			assertTrue(reader.getLastEntry().getComment()
 					.startsWith("revert: "));
 		}
 	}
 }
	/*
	* Copyright (C) 2011, Robin Rosenberg
	* 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.api;

	import static org.junit.Assert.assertEquals;
	import static org.junit.Assert.assertFalse;
	import static org.junit.Assert.assertNotNull;
	import static org.junit.Assert.assertNull;
	import static org.junit.Assert.assertTrue;

	import java.io.File;
	import java.io.IOException;
	import java.util.Iterator;

	import org.eclipse.jgit.api.MergeResult.MergeStatus;
	import org.eclipse.jgit.api.ResetCommand.ResetType;
	import org.eclipse.jgit.api.errors.GitAPIException;
	import org.eclipse.jgit.api.errors.JGitInternalException;
	import org.eclipse.jgit.dircache.DirCache;
	import org.eclipse.jgit.junit.RepositoryTestCase;
	import org.eclipse.jgit.lib.ConfigConstants;
	import org.eclipse.jgit.lib.Constants;
	import org.eclipse.jgit.lib.FileMode;
	import org.eclipse.jgit.lib.ReflogReader;
	import org.eclipse.jgit.lib.RepositoryState;
	import org.eclipse.jgit.merge.ResolveMerger.MergeFailureReason;
	import org.eclipse.jgit.revwalk.RevCommit;
	import org.junit.Test;

	/**
	* Test revert command
	*/
	public class RevertCommandTest extends RepositoryTestCase {
	@Test
	public void testRevert() throws IOException, JGitInternalException,
	GitAPIException {
	try (Git git = new Git(db)) {
	writeTrashFile("a", "first line\nsec. line\nthird line\n");
	git.add().addFilepattern("a").call();
	git.commit().setMessage("create a").call();

	writeTrashFile("b", "content\n");
	git.add().addFilepattern("b").call();
	git.commit().setMessage("create b").call();

	writeTrashFile("a", "first line\nsec. line\nthird line\nfourth line\n");
	git.add().addFilepattern("a").call();
	git.commit().setMessage("enlarged a").call();

	writeTrashFile("a",
	"first line\nsecond line\nthird line\nfourth line\n");
	git.add().addFilepattern("a").call();
	RevCommit fixingA = git.commit().setMessage("fixed a").call();

	writeTrashFile("b", "first line\n");
	git.add().addFilepattern("b").call();
	git.commit().setMessage("fixed b").call();

	git.revert().include(fixingA).call();

	assertEquals(RepositoryState.SAFE, db.getRepositoryState());

	assertTrue(new File(db.getWorkTree(), "b").exists());
	checkFile(new File(db.getWorkTree(), "a"),
	"first line\nsec. line\nthird line\nfourth line\n");
	Iterator<RevCommit> history = git.log().call().iterator();
	RevCommit revertCommit = history.next();
	String expectedMessage = "Revert \"fixed a\"\n\n"
	+ "This reverts commit " + fixingA.getId().getName() + ".\n";
	assertEquals(expectedMessage, revertCommit.getFullMessage());
	assertEquals("fixed b", history.next().getFullMessage());
	assertEquals("fixed a", history.next().getFullMessage());
	assertEquals("enlarged a", history.next().getFullMessage());
	assertEquals("create b", history.next().getFullMessage());
	assertEquals("create a", history.next().getFullMessage());
	assertFalse(history.hasNext());

	ReflogReader reader = db.getReflogReader(Constants.HEAD);
	assertTrue(reader.getLastEntry().getComment()
	.startsWith("revert: Revert \""));
	reader = db.getReflogReader(db.getBranch());
	assertTrue(reader.getLastEntry().getComment()
	.startsWith("revert: Revert \""));
	}

	}

	@Test
	public void testRevertMultiple() throws IOException, JGitInternalException,
	GitAPIException {
	try (Git git = new Git(db)) {
	writeTrashFile("a", "first\n");
	git.add().addFilepattern("a").call();
	git.commit().setMessage("add first").call();

	writeTrashFile("a", "first\nsecond\n");
	git.add().addFilepattern("a").call();
	RevCommit secondCommit = git.commit().setMessage("add second").call();

	writeTrashFile("a", "first\nsecond\nthird\n");
	git.add().addFilepattern("a").call();
	RevCommit thirdCommit = git.commit().setMessage("add third").call();

	git.revert().include(thirdCommit).include(secondCommit).call();

	assertEquals(RepositoryState.SAFE, db.getRepositoryState());

	checkFile(new File(db.getWorkTree(), "a"), "first\n");
	Iterator<RevCommit> history = git.log().call().iterator();
	RevCommit revertCommit = history.next();
	String expectedMessage = "Revert \"add second\"\n\n"
	+ "This reverts commit "
	+ secondCommit.getId().getName() + ".\n";
	assertEquals(expectedMessage, revertCommit.getFullMessage());
	revertCommit = history.next();
	expectedMessage = "Revert \"add third\"\n\n"
	+ "This reverts commit " + thirdCommit.getId().getName()
	+ ".\n";
	assertEquals(expectedMessage, revertCommit.getFullMessage());
	assertEquals("add third", history.next().getFullMessage());
	assertEquals("add second", history.next().getFullMessage());
	assertEquals("add first", history.next().getFullMessage());
	assertFalse(history.hasNext());

	ReflogReader reader = db.getReflogReader(Constants.HEAD);
	assertTrue(reader.getLastEntry().getComment()
	.startsWith("revert: Revert \""));
	reader = db.getReflogReader(db.getBranch());
	assertTrue(reader.getLastEntry().getComment()
	.startsWith("revert: Revert \""));
	}

	}

	@Test
	public void testRevertMultipleWithFail() throws IOException,
	JGitInternalException, GitAPIException {
	try (Git git = new Git(db)) {
	writeTrashFile("a", "first\n");
	git.add().addFilepattern("a").call();
	git.commit().setMessage("add first").call();

	writeTrashFile("a", "first\nsecond\n");
	git.add().addFilepattern("a").call();
	RevCommit secondCommit = git.commit().setMessage("add second").call();

	writeTrashFile("a", "first\nsecond\nthird\n");
	git.add().addFilepattern("a").call();
	git.commit().setMessage("add third").call();

	writeTrashFile("a", "first\nsecond\nthird\nfourth\n");
	git.add().addFilepattern("a").call();
	RevCommit fourthCommit = git.commit().setMessage("add fourth").call();

	git.revert().include(fourthCommit).include(secondCommit).call();

	// not SAFE because it failed
	assertEquals(RepositoryState.REVERTING, db.getRepositoryState());

	checkFile(new File(db.getWorkTree(), "a"), "first\n"
	+ "<<<<<<< master\n" + "second\n" + "third\n" + "=======\n"
	+ ">>>>>>> " + secondCommit.getId().abbreviate(7).name()
	+ " add second\n");
	Iterator<RevCommit> history = git.log().call().iterator();
	RevCommit revertCommit = history.next();
	String expectedMessage = "Revert \"add fourth\"\n\n"
	+ "This reverts commit " + fourthCommit.getId().getName()
	+ ".\n";
	assertEquals(expectedMessage, revertCommit.getFullMessage());
	assertEquals("add fourth", history.next().getFullMessage());
	assertEquals("add third", history.next().getFullMessage());
	assertEquals("add second", history.next().getFullMessage());
	assertEquals("add first", history.next().getFullMessage());
	assertFalse(history.hasNext());

	ReflogReader reader = db.getReflogReader(Constants.HEAD);
	assertTrue(reader.getLastEntry().getComment()
	.startsWith("revert: Revert \""));
	reader = db.getReflogReader(db.getBranch());
	assertTrue(reader.getLastEntry().getComment()
	.startsWith("revert: Revert \""));
	}

	}

	@Test
	public void testRevertDirtyIndex() throws Exception {
	try (Git git = new Git(db)) {
	RevCommit sideCommit = prepareRevert(git);

	// modify and add file a
	writeTrashFile("a", "a(modified)");
	git.add().addFilepattern("a").call();
	// do not commit

	doRevertAndCheckResult(git, sideCommit,
	MergeFailureReason.DIRTY_INDEX);
	}
	}

	@Test
	public void testRevertDirtyWorktree() throws Exception {
	try (Git git = new Git(db)) {
	RevCommit sideCommit = prepareRevert(git);

	// modify file a
	writeTrashFile("a", "a(modified)");
	// do not add and commit

	doRevertAndCheckResult(git, sideCommit,
	MergeFailureReason.DIRTY_WORKTREE);
	}
	}

	@Test
	public void testRevertConflictResolution() throws Exception {
	try (Git git = new Git(db)) {
	RevCommit sideCommit = prepareRevert(git);

	RevertCommand revert = git.revert();
	RevCommit newHead = revert.include(sideCommit.getId()).call();
	assertNull(newHead);
	MergeResult result = revert.getFailingResult();
	assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());
	assertTrue(new File(db.getDirectory(), Constants.MERGE_MSG).exists());
	assertEquals("Revert \"" + sideCommit.getShortMessage()
	+ "\"\n\nThis reverts commit " + sideCommit.getId().getName()
	+ ".\n\nConflicts:\n\ta\n",
	db.readMergeCommitMsg());
	assertTrue(new File(db.getDirectory(), Constants.REVERT_HEAD)
	.exists());
	assertEquals(sideCommit.getId(), db.readRevertHead());
	assertEquals(RepositoryState.REVERTING, db.getRepositoryState());

	// Resolve
	writeTrashFile("a", "a");
	git.add().addFilepattern("a").call();

	assertEquals(RepositoryState.REVERTING_RESOLVED,
	db.getRepositoryState());

	git.commit().setOnly("a").setMessage("resolve").call();

	assertEquals(RepositoryState.SAFE, db.getRepositoryState());
	}
	}

	@Test
	public void testRevertkConflictReset() throws Exception {
	try (Git git = new Git(db)) {
	RevCommit sideCommit = prepareRevert(git);

	RevertCommand revert = git.revert();
	RevCommit newHead = revert.include(sideCommit.getId()).call();
	assertNull(newHead);
	MergeResult result = revert.getFailingResult();

	assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());
	assertEquals(RepositoryState.REVERTING, db.getRepositoryState());
	assertTrue(new File(db.getDirectory(), Constants.REVERT_HEAD)
	.exists());

	git.reset().setMode(ResetType.MIXED).setRef("HEAD").call();

	assertEquals(RepositoryState.SAFE, db.getRepositoryState());
	assertFalse(new File(db.getDirectory(), Constants.REVERT_HEAD)
	.exists());
	}
	}

	@Test
	public void testRevertOverExecutableChangeOnNonExectuableFileSystem()
	throws Exception {
	try (Git git = new Git(db)) {
	File file = writeTrashFile("test.txt", "a");
	assertNotNull(git.add().addFilepattern("test.txt").call());
	assertNotNull(git.commit().setMessage("commit1").call());

	assertNotNull(git.checkout().setCreateBranch(true).setName("a").call());

	writeTrashFile("test.txt", "b");
	assertNotNull(git.add().addFilepattern("test.txt").call());
	RevCommit commit2 = git.commit().setMessage("commit2").call();
	assertNotNull(commit2);

	assertNotNull(git.checkout().setName(Constants.MASTER).call());

	DirCache cache = db.lockDirCache();
	cache.getEntry("test.txt").setFileMode(FileMode.EXECUTABLE_FILE);
	cache.write();
	assertTrue(cache.commit());
	cache.unlock();

	assertNotNull(git.commit().setMessage("commit3").call());

	db.getFS().setExecute(file, false);
	git.getRepository()
	.getConfig()
	.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
	ConfigConstants.CONFIG_KEY_FILEMODE, false);

	RevertCommand revert = git.revert();
	RevCommit newHead = revert.include(commit2).call();
	assertNotNull(newHead);
	}
	}

	@Test
	public void testRevertConflictMarkers() throws Exception {
	try (Git git = new Git(db)) {
	RevCommit sideCommit = prepareRevert(git);

	RevertCommand revert = git.revert();
	RevCommit newHead = revert.include(sideCommit.getId())
	.call();
	assertNull(newHead);
	MergeResult result = revert.getFailingResult();
	assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());

	String expected = "<<<<<<< master\na(latest)\n=======\na\n>>>>>>> ca96c31 second master\n";
	checkFile(new File(db.getWorkTree(), "a"), expected);
	}
	}

	@Test
	public void testRevertOurCommitName() throws Exception {
	try (Git git = new Git(db)) {
	RevCommit sideCommit = prepareRevert(git);

	RevertCommand revert = git.revert();
	RevCommit newHead = revert.include(sideCommit.getId())
	.setOurCommitName("custom name").call();
	assertNull(newHead);
	MergeResult result = revert.getFailingResult();
	assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());

	String expected = "<<<<<<< custom name\na(latest)\n=======\na\n>>>>>>> ca96c31 second master\n";
	checkFile(new File(db.getWorkTree(), "a"), expected);
	}
	}

	private RevCommit prepareRevert(Git git) throws Exception {
	// create, add and commit file a
	writeTrashFile("a", "a");
	git.add().addFilepattern("a").call();
	git.commit().setMessage("first master").call();

	// First commit
	checkoutBranch("refs/heads/master");
	// modify, add and commit file a
	writeTrashFile("a", "a(previous)");
	git.add().addFilepattern("a").call();
	RevCommit oldCommit = git.commit().setMessage("second master").call();

	// modify, add and commit file a
	writeTrashFile("a", "a(latest)");
	git.add().addFilepattern("a").call();
	git.commit().setMessage("side").call();

	return oldCommit;
	}

	private void doRevertAndCheckResult(final Git git,
	final RevCommit sideCommit, final MergeFailureReason reason)
	throws Exception {
	// get current index state
	String indexState = indexState(CONTENT);

	// revert
	RevertCommand revert = git.revert();
	RevCommit resultCommit = revert.include(sideCommit.getId()).call();
	assertNull(resultCommit);
	MergeResult result = revert.getFailingResult();
	assertEquals(MergeStatus.FAILED, result.getMergeStatus());
	// staged file a causes DIRTY_INDEX
	assertEquals(1, result.getFailingPaths().size());
	assertEquals(reason, result.getFailingPaths().get("a"));
	assertEquals("a(modified)", read(new File(db.getWorkTree(), "a")));
	// index shall be unchanged
	assertEquals(indexState, indexState(CONTENT));
	assertEquals(RepositoryState.SAFE, db.getRepositoryState());

	if (reason == null) {
	ReflogReader reader = db.getReflogReader(Constants.HEAD);
	assertTrue(reader.getLastEntry().getComment()
	.startsWith("revert: "));
	reader = db.getReflogReader(db.getBranch());
	assertTrue(reader.getLastEntry().getComment()
	.startsWith("revert: "));
	}
	}
	}