public void Push_Pop_Stack_Test()
{
DSStack <int> stack = new DSStack <int>();
stack.Push(1);
stack.Push(2);
stack.Push(3);
stack.Push(4);
stack.Push(5);
stack.Push(6);
stack.Pop();
Assert.AreEqual(5, stack.Head.Data);
Assert.IsNull(stack.Head.Prev);
Assert.IsNotNull(stack.Head.Next);
Assert.IsNotNull(stack.Head.Next.Next);
Assert.IsNotNull(stack.Head.Next.Next.Next);
Assert.IsNotNull(stack.Head.Next.Next.Next.Next);
Assert.IsNull(stack.Head.Next.Next.Next.Next.Next);
}
public bool IsPalindrome()
{
if (_data == null)
{
return(false);
}
FindMiddleOfList <char> findMiddle = new FindMiddleOfList <char>(_data);
int middleIndex = findMiddle.findCenterIndex();
DSStack <char> stack = new DSStack <char>();
int index = 0;
DSNode <char> current = _data;
while (current != null)
{
if (index > middleIndex)
{
var popped = stack.Pop();
if (popped != current.Data)
{
break;
}
}
else
{
stack.Push(current.Data);
if (index == middleIndex && middleIndex % 2 != 0)
{
stack.Pop();
}
}
index++;
current = current.Next;
}
return(stack.Count == 0);
}
