File: ReflogReaderTest.cs

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/*
This code is derived from jgit (http://eclipse.org/jgit).
Copyright owners are documented in jgit'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.
*/

using System.Collections.Generic;
using System.IO;
using NGit;
using NGit.Storage.File;
using Sharpen;

namespace NGit.Storage.File
{
	[NUnit.Framework.TestFixture]
	public class ReflogReaderTest : SampleDataRepositoryTestCase
	{
		internal static byte[] oneLine = Sharpen.Runtime.GetBytesForString("da85355dfc525c9f6f3927b876f379f46ccf826e 3e7549db262d1e836d9bf0af7e22355468f1717c A O Thor Too <authortoo@wri.tr> 1243028200 +0200\tcommit: Add a toString for debugging to RemoteRefUpdate\n"
			);

		internal static byte[] twoLine = Sharpen.Runtime.GetBytesForString(("0000000000000000000000000000000000000000 c6734895958052a9dbc396cff4459dc1a25029ab A U Thor <thor@committer.au> 1243028201 -0100\tbranch: Created from rr/renamebranchv4\n"
			 + "c6734895958052a9dbc396cff4459dc1a25029ab 54794942a18a237c57a80719afed44bb78172b10 Same A U Thor <same.author@example.com> 1243028202 +0100\trebase finished: refs/heads/rr/renamebranch5 onto c6e3b9fe2da0293f11eae202ec35fb343191a82d\n"
			));

		internal static byte[] twoLineWithAppendInProgress = Sharpen.Runtime.GetBytesForString
			(("0000000000000000000000000000000000000000 c6734895958052a9dbc396cff4459dc1a25029ab A U Thor <thor@committer.au> 1243028201 -0100\tbranch: Created from rr/renamebranchv4\n"
			 + "c6734895958052a9dbc396cff4459dc1a25029ab 54794942a18a237c57a80719afed44bb78172b10 Same A U Thor <same.author@example.com> 1243028202 +0100\trebase finished: refs/heads/rr/renamebranch5 onto c6e3b9fe2da0293f11eae202ec35fb343191a82d\n"
			 + "54794942a18a237c57a80719afed44bb78172b10 "));

		internal static byte[] aLine = Sharpen.Runtime.GetBytesForString("1111111111111111111111111111111111111111 3e7549db262d1e836d9bf0af7e22355468f1717c A U Thor <thor@committer.au> 1243028201 -0100\tbranch: change to a\n"
			);

		internal static byte[] masterLine = Sharpen.Runtime.GetBytesForString("2222222222222222222222222222222222222222 3e7549db262d1e836d9bf0af7e22355468f1717c A U Thor <thor@committer.au> 1243028201 -0100\tbranch: change to master\n"
			);

		internal static byte[] headLine = Sharpen.Runtime.GetBytesForString("3333333333333333333333333333333333333333 3e7549db262d1e836d9bf0af7e22355468f1717c A U Thor <thor@committer.au> 1243028201 -0100\tbranch: change to HEAD\n"
			);

		internal static byte[] oneLineWithoutComment = Sharpen.Runtime.GetBytesForString(
			"da85355dfc525c9f6f3927b876f379f46ccf826e 3e7549db262d1e836d9bf0af7e22355468f1717c A O Thor Too <authortoo@wri.tr> 1243028200 +0200\n"
			);

		internal static byte[] switchBranch = Sharpen.Runtime.GetBytesForString("0d43a6890a19fd657faad1c4cfbe3cb1b47851c3 4809df9c0d8bce5b00955563f77c5a9f25aa0d12 A O Thor Too <authortoo@wri.tr> 1315088009 +0200\tcheckout: moving from new/work to master\n"
			);

		/// <exception cref="System.Exception"></exception>
		[NUnit.Framework.Test]
		public virtual void TestReadOneLine()
		{
			SetupReflog("logs/refs/heads/master", oneLine);
			ReflogReader reader = new ReflogReader(db, "refs/heads/master");
			ReflogEntry e = reader.GetLastEntry();
			NUnit.Framework.Assert.AreEqual(ObjectId.FromString("da85355dfc525c9f6f3927b876f379f46ccf826e"
				), e.GetOldId());
			NUnit.Framework.Assert.AreEqual(ObjectId.FromString("3e7549db262d1e836d9bf0af7e22355468f1717c"
				), e.GetNewId());
			NUnit.Framework.Assert.AreEqual("A O Thor Too", e.GetWho().GetName());
			NUnit.Framework.Assert.AreEqual("authortoo@wri.tr", e.GetWho().GetEmailAddress());
			NUnit.Framework.Assert.AreEqual(120, e.GetWho().GetTimeZoneOffset());
			NUnit.Framework.Assert.AreEqual("2009-05-22T23:36:40", Iso(e.GetWho()));
			NUnit.Framework.Assert.AreEqual("commit: Add a toString for debugging to RemoteRefUpdate"
				, e.GetComment());
		}

		private string Iso(PersonIdent id)
		{
			SimpleDateFormat fmt;
			fmt = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
			fmt.SetTimeZone(id.GetTimeZone());
			return fmt.Format(id.GetWhen());
		}

		/// <exception cref="System.Exception"></exception>
		[NUnit.Framework.Test]
		public virtual void TestReadTwoLine()
		{
			SetupReflog("logs/refs/heads/master", twoLine);
			ReflogReader reader = new ReflogReader(db, "refs/heads/master");
			IList<ReflogEntry> reverseEntries = reader.GetReverseEntries();
			NUnit.Framework.Assert.AreEqual(2, reverseEntries.Count);
			ReflogEntry e = reverseEntries[0];
			NUnit.Framework.Assert.AreEqual(ObjectId.FromString("c6734895958052a9dbc396cff4459dc1a25029ab"
				), e.GetOldId());
			NUnit.Framework.Assert.AreEqual(ObjectId.FromString("54794942a18a237c57a80719afed44bb78172b10"
				), e.GetNewId());
			NUnit.Framework.Assert.AreEqual("Same A U Thor", e.GetWho().GetName());
			NUnit.Framework.Assert.AreEqual("same.author@example.com", e.GetWho().GetEmailAddress
				());
			NUnit.Framework.Assert.AreEqual(60, e.GetWho().GetTimeZoneOffset());
			NUnit.Framework.Assert.AreEqual("2009-05-22T22:36:42", Iso(e.GetWho()));
			NUnit.Framework.Assert.AreEqual("rebase finished: refs/heads/rr/renamebranch5 onto c6e3b9fe2da0293f11eae202ec35fb343191a82d"
				, e.GetComment());
			e = reverseEntries[1];
			NUnit.Framework.Assert.AreEqual(ObjectId.FromString("0000000000000000000000000000000000000000"
				), e.GetOldId());
			NUnit.Framework.Assert.AreEqual(ObjectId.FromString("c6734895958052a9dbc396cff4459dc1a25029ab"
				), e.GetNewId());
			NUnit.Framework.Assert.AreEqual("A U Thor", e.GetWho().GetName());
			NUnit.Framework.Assert.AreEqual("thor@committer.au", e.GetWho().GetEmailAddress()
				);
			NUnit.Framework.Assert.AreEqual(-60, e.GetWho().GetTimeZoneOffset());
			NUnit.Framework.Assert.AreEqual("2009-05-22T20:36:41", Iso(e.GetWho()));
			NUnit.Framework.Assert.AreEqual("branch: Created from rr/renamebranchv4", e.GetComment
				());
		}

		/// <exception cref="System.Exception"></exception>
		[NUnit.Framework.Test]
		public virtual void TestReadWhileAppendIsInProgress()
		{
			SetupReflog("logs/refs/heads/master", twoLineWithAppendInProgress);
			ReflogReader reader = new ReflogReader(db, "refs/heads/master");
			IList<ReflogEntry> reverseEntries = reader.GetReverseEntries();
			NUnit.Framework.Assert.AreEqual(2, reverseEntries.Count);
			ReflogEntry e = reverseEntries[0];
			NUnit.Framework.Assert.AreEqual(ObjectId.FromString("c6734895958052a9dbc396cff4459dc1a25029ab"
				), e.GetOldId());
			NUnit.Framework.Assert.AreEqual(ObjectId.FromString("54794942a18a237c57a80719afed44bb78172b10"
				), e.GetNewId());
			NUnit.Framework.Assert.AreEqual("Same A U Thor", e.GetWho().GetName());
			NUnit.Framework.Assert.AreEqual("same.author@example.com", e.GetWho().GetEmailAddress
				());
			NUnit.Framework.Assert.AreEqual(60, e.GetWho().GetTimeZoneOffset());
			NUnit.Framework.Assert.AreEqual("2009-05-22T22:36:42", Iso(e.GetWho()));
			NUnit.Framework.Assert.AreEqual("rebase finished: refs/heads/rr/renamebranch5 onto c6e3b9fe2da0293f11eae202ec35fb343191a82d"
				, e.GetComment());
		}

		// while similar to testReadTwoLine, we can assume that if we get the last entry
		// right, everything else is too
		/// <exception cref="System.Exception"></exception>
		[NUnit.Framework.Test]
		public virtual void TestReadRightLog()
		{
			SetupReflog("logs/refs/heads/a", aLine);
			SetupReflog("logs/refs/heads/master", masterLine);
			SetupReflog("logs/HEAD", headLine);
			NUnit.Framework.Assert.AreEqual("branch: change to master", db.GetReflogReader("master"
				).GetLastEntry().GetComment());
			NUnit.Framework.Assert.AreEqual("branch: change to a", db.GetReflogReader("a").GetLastEntry
				().GetComment());
			NUnit.Framework.Assert.AreEqual("branch: change to HEAD", db.GetReflogReader("HEAD"
				).GetLastEntry().GetComment());
		}

		/// <exception cref="System.Exception"></exception>
		[NUnit.Framework.Test]
		public virtual void TestReadLineWithMissingComment()
		{
			SetupReflog("logs/refs/heads/master", oneLineWithoutComment);
			ReflogReader reader = db.GetReflogReader("master");
			ReflogEntry e = reader.GetLastEntry();
			NUnit.Framework.Assert.AreEqual(ObjectId.FromString("da85355dfc525c9f6f3927b876f379f46ccf826e"
				), e.GetOldId());
			NUnit.Framework.Assert.AreEqual(ObjectId.FromString("3e7549db262d1e836d9bf0af7e22355468f1717c"
				), e.GetNewId());
			NUnit.Framework.Assert.AreEqual("A O Thor Too", e.GetWho().GetName());
			NUnit.Framework.Assert.AreEqual("authortoo@wri.tr", e.GetWho().GetEmailAddress());
			NUnit.Framework.Assert.AreEqual(120, e.GetWho().GetTimeZoneOffset());
			NUnit.Framework.Assert.AreEqual("2009-05-22T23:36:40", Iso(e.GetWho()));
			NUnit.Framework.Assert.AreEqual(string.Empty, e.GetComment());
		}

		/// <exception cref="System.Exception"></exception>
		[NUnit.Framework.Test]
		public virtual void TestNoLog()
		{
			NUnit.Framework.Assert.AreEqual(0, db.GetReflogReader("master").GetReverseEntries
				().Count);
			NUnit.Framework.Assert.IsNull(db.GetReflogReader("master").GetLastEntry());
		}

		/// <exception cref="System.Exception"></exception>
		[NUnit.Framework.Test]
		public virtual void TestCheckout()
		{
			SetupReflog("logs/HEAD", switchBranch);
			IList<ReflogEntry> entries = db.GetReflogReader(Constants.HEAD).GetReverseEntries
				();
			NUnit.Framework.Assert.AreEqual(1, entries.Count);
			ReflogEntry entry = entries[0];
			CheckoutEntry checkout = entry.ParseCheckout();
			NUnit.Framework.Assert.IsNotNull(checkout);
			NUnit.Framework.Assert.AreEqual("master", checkout.GetToBranch());
			NUnit.Framework.Assert.AreEqual("new/work", checkout.GetFromBranch());
		}

		/// <exception cref="System.Exception"></exception>
		[NUnit.Framework.Test]
		public virtual void TestSpecificEntryNumber()
		{
			SetupReflog("logs/refs/heads/master", twoLine);
			ReflogReader reader = new ReflogReader(db, "refs/heads/master");
			ReflogEntry e = reader.GetReverseEntry(0);
			NUnit.Framework.Assert.AreEqual(ObjectId.FromString("c6734895958052a9dbc396cff4459dc1a25029ab"
				), e.GetOldId());
			NUnit.Framework.Assert.AreEqual(ObjectId.FromString("54794942a18a237c57a80719afed44bb78172b10"
				), e.GetNewId());
			NUnit.Framework.Assert.AreEqual("Same A U Thor", e.GetWho().GetName());
			NUnit.Framework.Assert.AreEqual("same.author@example.com", e.GetWho().GetEmailAddress
				());
			NUnit.Framework.Assert.AreEqual(60, e.GetWho().GetTimeZoneOffset());
			NUnit.Framework.Assert.AreEqual("2009-05-22T22:36:42", Iso(e.GetWho()));
			NUnit.Framework.Assert.AreEqual("rebase finished: refs/heads/rr/renamebranch5 onto c6e3b9fe2da0293f11eae202ec35fb343191a82d"
				, e.GetComment());
			e = reader.GetReverseEntry(1);
			NUnit.Framework.Assert.AreEqual(ObjectId.FromString("0000000000000000000000000000000000000000"
				), e.GetOldId());
			NUnit.Framework.Assert.AreEqual(ObjectId.FromString("c6734895958052a9dbc396cff4459dc1a25029ab"
				), e.GetNewId());
			NUnit.Framework.Assert.AreEqual("A U Thor", e.GetWho().GetName());
			NUnit.Framework.Assert.AreEqual("thor@committer.au", e.GetWho().GetEmailAddress()
				);
			NUnit.Framework.Assert.AreEqual(-60, e.GetWho().GetTimeZoneOffset());
			NUnit.Framework.Assert.AreEqual("2009-05-22T20:36:41", Iso(e.GetWho()));
			NUnit.Framework.Assert.AreEqual("branch: Created from rr/renamebranchv4", e.GetComment
				());
			NUnit.Framework.Assert.IsNull(reader.GetReverseEntry(3));
		}

		/// <exception cref="System.IO.FileNotFoundException"></exception>
		/// <exception cref="System.IO.IOException"></exception>
		private void SetupReflog(string logName, byte[] data)
		{
			FilePath logfile = new FilePath(db.Directory, logName);
			if (!logfile.GetParentFile().Mkdirs() && !logfile.GetParentFile().IsDirectory())
			{
				throw new IOException("oops, cannot create the directory for the test reflog file"
					 + logfile);
			}
			FileOutputStream fileOutputStream = new FileOutputStream(logfile);
			try
			{
				fileOutputStream.Write(data);
			}
			finally
			{
				fileOutputStream.Close();
			}
		}
	}
}