public void ShouldAddAndDivide(
            [Values(10, 20, 30)] int numToAdd,
            [Values(2, 1, 10)] int numToDivideBy)
        {
            var sut = new MemoryCalculator();

            sut.Add(numToAdd);
            sut.Divide(numToDivideBy);
        }
        public void ShouldSubtractTwoNegativeNumbers(int firstNum, int secondNum, int expected)
        {
            var sut = new MemoryCalculator();

            sut.Substract(firstNum);
            sut.Substract(secondNum);

            Assert.That(sut.Amount, Is.EqualTo(expected));
        }