public void TestOhmValueTolerationCalculation()
        {
            double ohms                 = 100;                       // value = 100 ohms
            double tolerance            = 0.1;                       // tolerance = 10%
            var    expected_upper_range = ohms + (ohms * tolerance); // 110
            var    expected_lower_range = ohms - (ohms * tolerance); //  90

            double[] results = calculator.GetValueRange(ohms, tolerance);
            Assert.IsTrue(results[1] == expected_upper_range && results[0] == expected_lower_range);
        }