public void Run_ShouldReturnEmptyStringForEmptyImput()
 {
     Assert.That(PigLatin.Run(""), Is.EqualTo(""));
 }
 public void Run_ShouldReturnPigLatingWord()
 {
     Assert.That(PigLatin.Run("Mark Farragher"), Is.EqualTo("arkmay arragherfay"));
 }
 public void Run_ShouldReturnNullForNullImput()
 {
     Assert.That(PigLatin.Run(null), Is.Null);
 }