public void StackX_Positive()
{
var stack = new StackX <int>();
Assert.IsTrue(stack.IsEmpty());
stack.Push(1);
stack.Push(3);
stack.Push(5);
stack.Push(7);
stack.Push(9);
Assert.AreEqual(5, stack.Size());
Assert.AreEqual(9, stack.Peek());
Assert.AreEqual(9, stack.Pop());
Assert.AreEqual(7, stack.Pop());
Assert.AreEqual(3, stack.Size());
Assert.AreEqual(5, stack.Peek());
stack.Push(66);
var list = new List <int> {
66, 5, 3, 1
};
int index = 0;
foreach (var i in stack)
{
Assert.AreEqual(list[index++], i);
}
}
