def test_twoMinusFourteenEqualsNegativeTwelve(self):
calc = Calculator()
calc.add_digit(2)
calc.set_operation(operators["-"])
calc.add_digit(1)
calc.add_digit(4)
self.assertEqual(calc.get_result(), -12)
def test_twoPlusFourteenEqualsSixteen(self):
calc = Calculator()
calc.add_digit(2)
calc.set_operation(operators["+"])
calc.add_digit(1)
calc.add_digit(4)
self.assertEqual(calc.get_result(), 16)