using System;

using NUnit.Framework;

​

namespace InterviewExercise

{

    public class Reverser

    {

        public static string ReverseSentenceWords(string sentence)

        {

            // modify from here

            // ----------------

            var words = sentence.Split(' ');

            var result = "";

            for (var i = words.Length - 1; i >= 0; i--) {

                result += words[i] + " ";   

            }

            return result.Substring(0, sentence.Length);

            // ----------

            // until here

        }

    }

    // nothing to modify after here

    public class Program

    {

        public static void Main() 

        {

            var x = new NUnitLite.AutoRun().Execute(new string[]{"--test:InterviewExercise.ReverserTests", "--noc"});

            Console.WriteLine("");

            Console.WriteLine("----------------------------------------------");

            Console.WriteLine(x==0?"All Test Passed... :¬)": string.Format("{0} tests failed... :¬(", x));

            Console.WriteLine("----------------------------------------------");

        }

    }

​

    [TestFixture]

    public class ReverserTests

    {   

        [TestCase("Hello", "Hello", Description = "Hello")]

        [TestCase("Hello world", "world Hello", Description = "Hello world")]

        [TestCase("Hello and happy new year!", "year! new happy and Hello", Description = "Hello and happy new year!")]

        [TestCase("", "", Description = "Empty string")]

        [TestCase(" ", " ", Description = "Whitespace")]

        [Test]

        public void Reverse_ShouldReverseSentence(string input, string expected)

        {

            var revertedSentence = Reverser.ReverseSentenceWords(input);

            Assert.AreEqual(expected, revertedSentence);

        }

    }

}