def test_output_product_and_response_without_enough_input_money(self):
vm = VendingMachine()
vm._user_input_value = 0.55
self.assertEqual(
vm.output_product_and_response('A'),
['Don\'t have enough money, please insert $0.10 extra.'])
def test_output_product_and_response_with_changes(self):
vm = VendingMachine()
vm._user_input_value = 0.75
self.assertEqual(vm.output_product_and_response('A'), ['A', 'N', 'N'])
