public void LengthOfLongestSubstringTest4()
        {
            var result = LengthOfLongestSubstringSolution.LengthOfLongestSubstring("aab");

            Assert.Equal(2, result);
        }
        public void LengthOfLongestSubstringTest5()
        {
            var result = LengthOfLongestSubstringSolution.LengthOfLongestSubstring("dvdf");

            Assert.Equal(3, result);
        }
        public void LengthOfLongestSubstringTest1()
        {
            var result = LengthOfLongestSubstringSolution.LengthOfLongestSubstring("abcabcbb");

            Assert.Equal(3, result);
        }