public void ExercisePushPopPeak()
{
var s = new StackViaLinkedList <int>();
s.Push(5);
Assert.AreEqual(5, s.Peak());
s.Push(45);
s.Push(-34);
Assert.AreEqual(-34, s.Peak());
Assert.AreEqual(-34, s.Pop());
Assert.AreEqual(45, s.Peak());
Assert.AreEqual(45, s.Pop());
Assert.AreEqual(5, s.Peak());
}
public void ExceptionThrownOnPeakOnEmptyStack()
{
var s = new StackViaLinkedList <int>();
Assert.Throws <IndexOutOfRangeException>(() => s.Peak());
}