public void isValidString_cacahuette37_20_1()
        {
            bool result = RegexFunction.isValidstring("cacahuette37", 20, 1);

            Assert.AreEqual(false, result);
        }
        public void isValidString_cacahuette_1_20()
        {
            bool result = RegexFunction.isValidstring("c@c@huette", 1, 20);

            Assert.AreEqual(false, result);
        }
        public void isValidString_cacahuette37_1_20()
        {
            bool result = RegexFunction.isValidstring("cacahuette37", 1, 20);

            Assert.AreEqual(true, result);
        }