public void SampleTest()
{
Assert.AreEqual(new Node(3, new Node(2, new Node(1, null))), Kata.ReverseList(new Node(1, new Node(2, new Node(3, null)))));
// For simplicity, Node can also be constructed using any non-empty IEnumerable<int>:
Assert.AreEqual(new Node(new int[] { 5, 4, 3, 2, 1 }), Kata.ReverseList(new Node(new int[] { 1, 2, 3, 4, 5 })));
}