public void ContainsAtLeastOneDouble_Middle_Invalid()
        {
            var input  = 124443;
            var result = PasswordValidator.ContainsAtLeastOneDouble(input);

            Assert.IsFalse(result);
        }
        public void ContainsAtLeastOneDouble_AtLeastOne_Valid()
        {
            var input  = 111122;
            var result = PasswordValidator.ContainsAtLeastOneDouble(input);

            Assert.IsTrue(result);
        }