Reverse string...

ReverseStringTests.cs

using System;
using System.Linq;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Globalization;
using System.Collections.Generic;

namespace ReverseString
{
    [TestClass]
    public class ReverseStringTests
    {
        [TestMethod]
        public void Empty()
        {
            Assert.AreEqual("", Reverse(""));
        }

        [TestMethod]
        public void SingleChar()
        {
            Assert.AreEqual("A", Reverse("A"));
        }

        [TestMethod]
        public void TwoChars()
        {
            Assert.AreEqual("BA", Reverse("AB"));
        }

        [TestMethod]
        public void ThreeChars()
        {
            Assert.AreEqual("CBA", Reverse("ABC"));
        }

        [TestMethod]
        public void LesMis_no_accent()
        {
            Assert.AreEqual("selbaresiM seL", Reverse("Les Miserables"));
        }

        [TestMethod]
        public void LesMisCopied()
        {
            Assert.AreEqual("selbarésiM seL", Reverse("Les Misérables"));
        }

        [TestMethod]
        public void LesMis()
        {
            Assert.AreEqual("selbare\u0301siM seL", Reverse("Les Mise\u0301rables"));
        }

        string Reverse2(string str)
        {
            var l = str.ToCharArray().ToList();
            l.Reverse();
            return String.Concat(l.ToArray());
        }

        string Reverse(string str)
        {
            var e = StringInfo.GetTextElementEnumerator(str);
            var l = new List<string>();
            while (e.MoveNext())
            {
                l.Add(e.GetTextElement());
            }
            l.Reverse();
            return string.Concat(l);
        }
    }
}