public void QueueStack_EmptyStackIsEmpty_CorrectElementsReturned()
{
StackUsingQueue<String> stack = new StackUsingQueue<String>();
bool isEmpty = stack.IsEmpty();
Assert.AreEqual(true, isEmpty);
}
public void QueueStack_StackNotEmptyAfterPush_CorrectElementsReturned()
{
StackUsingQueue<String> stack = new StackUsingQueue<String>();
stack.Push("hi");
bool isEmpty = stack.IsEmpty();
Assert.AreEqual(false, isEmpty);
}