public void FirstNonRepeaterTest1()
        {
            var stringLength = new StringsLengths(5, "aabbc");

            Assert.AreEqual("c", FirstNonRepeatingCharacterInString.NonRepeatingCharacter(stringLength));
        }
        public void FirstNonRepeaterTest2()
        {
            var stringLength = new StringsLengths(6, "paalla");

            Assert.AreEqual("p", FirstNonRepeatingCharacterInString.NonRepeatingCharacter(stringLength));
        }