public void TestAddIngredientsToItem() { //Arrange MenuItem _menuItem = new MenuItem("1", "Cheeseburger", "Burger with Cheese", new List <string> { "patty", "bun", "cheese" }, "5.99"); MenuRepository _menuRepo = new MenuRepository(); // List<MenuItem> menu = _menuRepo.GetMenu(); List <string> addedIngredients = _menuRepo.AddIngredientToMenuItem(_menuItem, "lettuce, tomato, pickle"); Assert.AreEqual(6, addedIngredients.Count); }