public double Add_Accumulator(double a, double b, double c)
        {
            var uut = new CalculatorUnit();

            uut.Add(a, b);
            return(uut.Add(c));
        }
        public void Clear_Accumulator_Function2x(double a, double b, double accumulatorValue)
        {
            var uut = new CalculatorUnit();

            uut.Add(b, a);
            uut.Add(a, b);
            uut.Clear();
            Assert.That(uut.Accumulator, Is.EqualTo(accumulatorValue));
        }
        public double Add_Accumulator_OneParameter(double a)
        {
            var uut = new CalculatorUnit();

            return(uut.Add(a));
        }
        public double Add(double a, double b)
        {
            var uut = new CalculatorUnit();

            return(uut.Add(a, b));
        }