public void CannotSelectInputGreaterThanSix()
        {
            const int greaterThanInput = 7;
            var pre = new Preamplifier();

            pre.SelectInput(greaterThanInput);
        }
        public void CannotSelectInputNumberZero()
        {
            const int inputZero = 0;
            var pre = new Preamplifier();

            pre.SelectInput(inputZero);
        }
        public void CanSelectDifferentInput()
        {
            const int expectedInput = 2;
            var pre = new Preamplifier();

            Debug.WriteLine(String.Format("Default Input = #{0}", pre.CurrentInput.Number));

            pre.SelectInput(expectedInput);

            Assert.AreEqual(expectedInput, pre.CurrentInput.Number);
            Debug.WriteLine(String.Format("New Input = #{0}", pre.CurrentInput.Number));
        }
        public void CannotSelectNegativeInput()
        {
            const int negativeInput = -1;
            var pre = new Preamplifier();

            pre.SelectInput(negativeInput);
        }