public Wishlist WithOneBasketItem()
 {
     _wishlist = new Wishlist {
         BuyerId = WishlistBuyerId, Id = WishlistId
     };
     _wishlist.AddItemToWishlist(2, "string", 4);
     return(_wishlist);
 }
        public void AddsWishListItemIfNotPresent()
        {
            var wishList = new Wishlist();

            wishList.AddItemToWishlist(_catalogItemId, _catalogItemName, _unitPrice);

            var firstItem = wishList.Items.Single();

            Assert.Equal(_catalogItemId, firstItem.CatalogItemId);
            Assert.Equal(_catalogItemName, firstItem.CatalogItemName);
            Assert.Equal(_unitPrice, firstItem.UnitPrice);
        }