public void implement_str__succes_test()
        {
            var implement = new Implement_strStr_28();
            var expected  = implement.StrStr("mississippi", "issip");

            Assert.AreEqual(expected, 4);
        }
        public void implement_str__fail_test()
        {
            var implement = new Implement_strStr_28();
            var expected  = implement.StrStr("aaaaaaaa", "bba");

            Assert.AreEqual(expected, -1);
        }