public async Task CanGetCommitsAndCommentCount()
    {
        await CreateTheWorld();

        var newPullRequest = new NewPullRequest("a pull request", branchName, "master");
        var pullRequest    = await _fixture.Create(Helper.UserName, _context.RepositoryName, newPullRequest);

        // create new commit for branch

        const string commitMessage = "Another commit in branch";

        var branch = await _github.Git.Reference.Get(Helper.UserName, _context.RepositoryName, "heads/" + branchName);

        var newTree = await CreateTree(new Dictionary <string, string> {
            { "README.md", "Hello World!" }
        });

        var newCommit = await CreateCommit(commitMessage, newTree.Sha, branch.Object.Sha);

        await _github.Git.Reference.Update(Helper.UserName, _context.RepositoryName, "heads/" + branchName, new ReferenceUpdate(newCommit.Sha));

        await _repositoryCommentsClient.Create(Helper.UserName, _context.RepositoryName, newCommit.Sha, new NewCommitComment("I am a nice comment") { Path = "README.md", Position = 1 });

        // don't try this at home
        await Task.Delay(TimeSpan.FromSeconds(5));

        var result = await _fixture.Commits(Helper.UserName, _context.RepositoryName, pullRequest.Number);

        Assert.Equal(3, result.Count);
        Assert.Equal("this is the commit to merge into the pull request", result[0].Commit.Message);
        Assert.Equal(0, result[0].Commit.CommentCount);
        Assert.Equal(commitMessage, result[2].Commit.Message);
        Assert.Equal(1, result[2].Commit.CommentCount);
    }
        /// <summary>
        /// Creates a new Commit Comment for a specified Commit.
        /// </summary>
        /// <param name="owner">The owner of the repository</param>
        /// <param name="name">The name of the repository</param>
        /// <param name="sha">The sha reference of commit</param>
        /// <param name="newCommitComment">The new comment to add to the commit</param>
        /// <remarks>http://developer.github.com/v3/repos/comments/#create-a-commit-comment</remarks>
        public IObservable <CommitComment> Create(string owner, string name, string sha, NewCommitComment newCommitComment)
        {
            Ensure.ArgumentNotNullOrEmptyString(owner, "owner");
            Ensure.ArgumentNotNullOrEmptyString(name, "name");
            Ensure.ArgumentNotNullOrEmptyString(sha, "sha");
            Ensure.ArgumentNotNull(newCommitComment, "newCommitComment");

            return(_client.Create(owner, name, sha, newCommitComment).ToObservable());
        }