public void CanGetFileHistory(){
var githelper = new GitHelper { DirectoryName = dirname, AuthorName = "test" }.Connect();
githelper.WriteAndCommit("x", "a", "1");
var first = githelper.GetCommitId();
githelper.WriteAndCommit("x", "b", "2");
var second = githelper.GetCommitId();
var hist = githelper.GetHistory("x");
Assert.AreEqual(2,hist.Length);
Assert.AreEqual(second,hist[0].Hash);
Assert.AreEqual(first,hist[1].Hash);
}