Test your Stack implementation

gistfile1.pde

// Notice: the Node should have a toString() method
//          which returns the <content> instance variable

void setup() {
  Node a = new Node("123");
  Node b = new Node("456");
  Node c = new Node("789");
  
  Stack s = new Stack();
  s.push(a);
  s.push(b);
  
  println(s.getLength()); // should return 2
  println(s.pop()); // should return "456"
  
  s.push(c);
  println(s.getLength()); // should return 2
  println(s.peek()); // should return "789"
  println(s.pop()); // should return "789"
  
  println(s.isEmpty()); // should return false
  println(s.pop()); // should return "123"
  println(s.isEmpty()); // should return true
}