def test_subtraction_of_negative_2_minus_negative_4(self): first_number = -2 second_number = -4 calculator = Calculator("comum") self.assertEqual(2, calculator.subtract(first_number, second_number))
def test_subtraction_of_0_minus_1(self): first_number = 0 second_number = 1 calculator = Calculator("comum") self.assertEqual(-1, calculator.subtract(first_number, second_number))