public void FindNthRoot_ThrowArgumentException(double a, int n, double eps)
 {
     Assert.Throws <ArgumentException>(() => FindNthRoot.SqrtN(a, n, eps));
 }
        public void FindNthRootTestCase(double a, int n, double eps, double expected)
        {
            double actual = FindNthRoot.SqrtN(a, n, eps);

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