public void When_Calculating_The_Number_Of_Letters_In_All_The_Words_Under_5()
        {
            var problem = new Problem_017();
            var result = problem.CalculateLettersInWordsUnder(5);

            Assert.That(result, Is.EqualTo(19));
        }
        public void When_Calculating_Number_Of_Letters_In_342_The_Result_Is_23()
        {
            var problem = new Problem_017();
            var result = problem.GetWordLength(342);

            Assert.That(result, Is.EqualTo(23));
        }