public void Answer_ContainsOfThree(string positive, string negative, uint input, string expect)
        {
            var target = new FizzBuzzRule(n => n.ToString().Contains("3") ? positive : negative);

            target.Answer(input).Is(expect);
        }
        public void Answer_MultipulesOfFifteen(string positive, string negative, uint input, string expect)
        {
            var target = new FizzBuzzRule(n => n % 15u == 0u ? positive : negative);

            target.Answer(input).Is(expect);
        }