def test_push(self):
myStack = Stack()
myStack.push(5)
self.assertEqual(myStack.topElement(), 5)
def test_pop(self):
myStack = Stack()
myStack.push(10)
self.assertEqual(myStack.pop().data, 10)
def test_isNotEmpty(self):
myStack = Stack()
myStack.push(10)
self.assertFalse(myStack.isEmpty())
def test_topElement(self):
myStack = Stack()
myStack.push(10)
self.assertEqual(myStack.topElement(), 10)