public void GetCommit_RevisionDoesNotExist()
		{
			var file = new FileInfo("file.txt");
			var result = file.GetCommit(Revision.Create("1.5"));
			Assert.AreSame(result, null);
		}
		public void GetCommit_RevisionExists()
		{
			var file = new FileInfo("file.txt");
			var commit = new Commit("abc").WithRevision(file, "1.1");

			var result = file.GetCommit(Revision.Create("1.1"));
			Assert.AreSame(result, commit);
		}