public void CalculateTest(double firstArgument, double expectedResult)
        {
            var calculator   = new LogTwoCalculator();
            var actualResult = calculator.Calculate(firstArgument);

            Assert.AreEqual(expectedResult, actualResult, 0.001);
        }
        public void ExceptionTest()
        {
            var calculator = new LogTwoCalculator();

            Assert.Throws <Exception>(() => calculator.Calculate(-10));
        }