public void FindRootArgumentOutOfRangeException(double number, int rootPower, double epsilon)
 {
     Assert.Throws <ArgumentOutOfRangeException>(() => FindNRoot.FindRoot(number, rootPower, epsilon));
 }
        public void FindRoot(double number, int rootPower, double epsilon, double expected)
        {
            double actual = FindNRoot.FindRoot(number, rootPower, epsilon);

            Assert.AreEqual(expected, actual, epsilon);
        }