public void StackNodeDoesNoContainRemovedElements()
{
// Create a stack
StackNode stack = CreateStackNode(k_DefaultX, k_DefaultY);
stack.AddElement(m_Node1);
stack.AddElement(m_Node2);
// Verify that a node is properly removed from its containing stack
stack.RemoveElement(m_Node1);
Assert.AreEqual(1, stack.childCount);
Assert.IsFalse(stack.Contains(m_Node1));
Assert.IsNull(m_Node1.parent);
stack.RemoveElement(m_Node2);
Assert.AreEqual(0, stack.childCount);
Assert.IsFalse(stack.Contains(m_Node2));
Assert.IsNull(m_Node2.parent);
}