public void SqrtN_ValidInputParameters_NthRootWithPercisionReturned(double number, double n, double epsilon)
        {
            double calculatedValue = NewtonAlgorithm.SqrtN(number, n, epsilon);
            double exactValue      = Math.Pow(number, 1.0 / n);

            Assert.Less(Math.Abs(exactValue - calculatedValue), epsilon);
        }
 public void SqrtN_InvalidParameters_NthRootCannotBeTaken(double number, double n, double epsilon)
 {
     Assert.Throws <ArgumentException>(() => NewtonAlgorithm.SqrtN(number, n, epsilon));
 }