def test_topElement_stackEmpty(self):
myStack = Stack()
self.assertEqual(myStack.topElement(), "Stack empty")
def test_push(self):
myStack = Stack()
myStack.push(5)
self.assertEqual(myStack.topElement(), 5)
def test_topElement(self):
myStack = Stack()
myStack.push(10)
self.assertEqual(myStack.topElement(), 10)