public void CalculateTest(double firstValue, double expected)
        {
            var calculator   = new LogOneArgument();
            var actualResult = calculator.Calculate(firstValue);

            Assert.AreEqual(expected, actualResult, 0.001);
        }
        public void NegativeLogOneArgumentTest()
        {
            var calculator = new LogOneArgument();

            Assert.Throws <Exception>(() => calculator.Calculate(-1));
        }