def test_is_empty_when_pushed(self): stack = ArrayStack() stack.push(1) self.assertFalse(stack.isEmpty())
def test_is_empty_when_pushed_and_deleted(self): stack = ArrayStack() stack.push(1) stack.pop() self.assertTrue(stack.isEmpty())
def test_is_empty_when_empty(self): stack = ArrayStack() self.assertTrue(stack.isEmpty())