public void AddItem_AssociatesItemWithCategory_ArtistList() { //Arrange string description = "Walk the dog."; Artist newArtist = new Artist(description); List <Artist> newList = new List <Artist> { newArtist }; string name = "Work"; CD newCD = new CD(name); newCD.AddArtist(newArtist); //Act List <Artist> result = newCD.GetArtist(); //Assert CollectionAssert.AreEqual(newList, result); }