using System.IO;

using LibGit2Sharp.Tests.TestHelpers;

using System.Linq;

using Xunit;

namespace LibGit2Sharp.Tests

{

public class ReflogFixture : BaseFixture

{

[Fact]

public void CanReadReflog()

{

const int expectedReflogEntriesCount = 3;

using (var repo = new Repository(StandardTestRepoWorkingDirPath))

{

var reflog = repo.Refs.Log(repo.Refs.Head);

Assert.Equal(expectedReflogEntriesCount, reflog.Count());

// Initial commit assertions

Assert.Equal("timothy.clem@gmail.com", reflog.Last().Commiter.Email);

Assert.True(reflog.Last().Message.StartsWith("clone: from"));

Assert.Equal(ObjectId.Zero, reflog.Last().From);

// second commit assertions

Assert.Equal("4c062a6361ae6959e06292c1fa5e2822d9c96345", reflog.ElementAt(expectedReflogEntriesCount - 2).From.Sha);

Assert.Equal("592d3c869dbc4127fc57c189cb94f2794fa84e7e", reflog.ElementAt(expectedReflogEntriesCount - 2).To.Sha);

}

}

[Fact]

public void CannotReadReflogOnUnknownReference()

{

using (var repo = new Repository(StandardTestRepoWorkingDirPath))

{

Assert.Throws<InvalidSpecificationException>(() => repo.Refs.Log("toto").Count());

}

}

[Fact]

public void CommitShouldCreateReflogEntryOnHeadandOnTargetedDirectReference()

{

SelfCleaningDirectory scd = BuildSelfCleaningDirectory();

using (var repo = Repository.Init(scd.DirectoryPath))

{

// setup refs as HEAD => unit_test => master

var newRef = repo.Refs.Add("refs/heads/unit_test", "refs/heads/master");

Assert.NotNull(newRef);

repo.Refs.UpdateTarget(repo.Refs.Head, newRef);

const string relativeFilepath = "new.txt";

string filePath = Path.Combine(repo.Info.WorkingDirectory, relativeFilepath);

File.WriteAllText(filePath, "content\n");

repo.Index.Stage(relativeFilepath);

var author = DummySignature;

const string commitMessage = "Hope reflog behaves as it should";

Commit commit = repo.Commit(commitMessage, author, author);

// Assert a reflog entry is created on HEAD

Assert.Equal(1, repo.Refs.Log("HEAD").Count());

var reflogEntry = repo.Refs.Log("HEAD").First();

Assert.Equal(author, reflogEntry.Commiter);

Assert.Equal(commit.Id, reflogEntry.To);

Assert.Equal(ObjectId.Zero, reflogEntry.From);

// Assert the same reflog entry is created on refs/heads/master

Assert.Equal(1, repo.Refs.Log("refs/heads/master").Count());

reflogEntry = repo.Refs.Log("HEAD").First();

Assert.Equal(author, reflogEntry.Commiter);

Assert.Equal(commit.Id, reflogEntry.To);

Assert.Equal(ObjectId.Zero, reflogEntry.From);

// Assert no reflog entry is created on refs/heads/unit_test

Assert.Equal(0, repo.Refs.Log("refs/heads/unit_test").Count());

}

}

[Fact]

public void CommitOnUnbornReferenceShouldCreateReflogEntryWithInitialTag()

{

SelfCleaningDirectory scd = BuildSelfCleaningDirectory();

using (var repo = Repository.Init(scd.DirectoryPath))

{

const string relativeFilepath = "new.txt";

string filePath = Path.Combine(repo.Info.WorkingDirectory, relativeFilepath);

File.WriteAllText(filePath, "content\n");

repo.Index.Stage(relativeFilepath);

var author = DummySignature;

const string commitMessage = "First commit should be logged as initial";

repo.Commit(commitMessage, author, author);

// Assert the reflog entry message is correct

Assert.Equal(1, repo.Refs.Log("HEAD").Count());

Assert.Equal(string.Format("commit (initial): {0}", commitMessage), repo.Refs.Log("HEAD").First().Message);

}

}

[Fact]

public void CommitOnDetachedHeadShouldInsertReflogEntry()

{

string repoPath = CloneStandardTestRepo();

using (var repo = new Repository(repoPath))

{

Assert.False(repo.Info.IsHeadDetached);

var parentCommit = repo.Head.Tip.Parents.First();

repo.Checkout(parentCommit.Sha);

Assert.True(repo.Info.IsHeadDetached);

const string relativeFilepath = "new.txt";

string filePath = Path.Combine(repo.Info.WorkingDirectory, relativeFilepath);

File.WriteAllText(filePath, "content\n");

repo.Index.Stage(relativeFilepath);

var author = DummySignature;

const string commitMessage = "Commit on detached head";

var commit = repo.Commit(commitMessage, author, author);

// Assert a reflog entry is created on HEAD

var reflogEntry = repo.Refs.Log("HEAD").First();

Assert.Equal(author, reflogEntry.Commiter);

Assert.Equal(commit.Id, reflogEntry.To);

Assert.Equal(string.Format("commit: {0}", commitMessage), repo.Refs.Log("HEAD").First().Message);

}

}

}

}