public void Test_Preorder2()
{
long[] preorder = _algo.Preorder(_testTree);
List <long> preorderList = new List <long>();
_algo.PreorderNoRecursion(_testTree, preorderList);
int i = 0;
foreach (var e in preorderList)
{
Assert.AreEqual(preorder[i++], e);
}
Assert.IsTrue(true);
}
