public void Can_parse_allowed_quantities()
        {
            var pv = new ProductVariant()
            {
                AllowedQuantities = "1, 5,4,10,sdf"
            };

            var result = pv.ParseAllowedQuatities();
            result.Length.ShouldEqual(4);
            result[0].ShouldEqual(1);
            result[1].ShouldEqual(5);
            result[2].ShouldEqual(4);
            result[3].ShouldEqual(10);
        }
        /// <summary>
        /// Validates a product variant for standard properties
        /// </summary>
        /// <param name="customer">Customer</param>
        /// <param name="shoppingCartType">Shopping cart type</param>
        /// <param name="productVariant">Product variant</param>
        /// <param name="selectedAttributes">Selected attributes</param>
        /// <param name="customerEnteredPrice">Customer entered price</param>
        /// <param name="quantity">Quantity</param>
        /// <returns>Warnings</returns>
        public virtual IList<string> GetStandardWarnings(Customer customer, ShoppingCartType shoppingCartType,
            ProductVariant productVariant, string selectedAttributes, decimal customerEnteredPrice,
            int quantity)
        {
            if (customer == null)
                throw new ArgumentNullException("customer");

            if (productVariant == null)
                throw new ArgumentNullException("productVariant");

            var warnings = new List<string>();

            var product = productVariant.Product;
            if (product == null)
            {
                warnings.Add(string.Format(_localizationService.GetResource("ShoppingCart.CannotLoadProduct"), productVariant.ProductId));
                return warnings;
            }

            //deleted?
            if (product.Deleted || productVariant.Deleted)
            {
                warnings.Add(_localizationService.GetResource("ShoppingCart.ProductDeleted"));
                return warnings;
            }

            //published?
            if (!product.Published || !productVariant.Published)
            {
                warnings.Add(_localizationService.GetResource("ShoppingCart.ProductUnpublished"));
            }

            //ACL
            if (!_aclService.Authorize(product, customer))
            {
                warnings.Add(_localizationService.GetResource("ShoppingCart.ProductUnpublished"));
            }

            //Store mapping
            if (!_storeMappingService.Authorize(product, _storeContext.CurrentStore))
            {
                warnings.Add(_localizationService.GetResource("ShoppingCart.ProductUnpublished"));
            }

            //disabled "add to cart" button
            if (shoppingCartType == ShoppingCartType.ShoppingCart && productVariant.DisableBuyButton)
            {
                warnings.Add(_localizationService.GetResource("ShoppingCart.BuyingDisabled"));
            }

            //disabled "add to wishlist" button
            if (shoppingCartType == ShoppingCartType.Wishlist && productVariant.DisableWishlistButton)
            {
                warnings.Add(_localizationService.GetResource("ShoppingCart.WishlistDisabled"));
            }

            //call for price
            if (shoppingCartType == ShoppingCartType.ShoppingCart && productVariant.CallForPrice)
            {
                warnings.Add(_localizationService.GetResource("Products.CallForPrice"));
            }

            //customer entered price
            if (productVariant.CustomerEntersPrice)
            {
                if (customerEnteredPrice < productVariant.MinimumCustomerEnteredPrice ||
                    customerEnteredPrice > productVariant.MaximumCustomerEnteredPrice)
                {
                    decimal minimumCustomerEnteredPrice = _currencyService.ConvertFromPrimaryStoreCurrency(productVariant.MinimumCustomerEnteredPrice, _workContext.WorkingCurrency);
                    decimal maximumCustomerEnteredPrice = _currencyService.ConvertFromPrimaryStoreCurrency(productVariant.MaximumCustomerEnteredPrice, _workContext.WorkingCurrency);
                    warnings.Add(string.Format(_localizationService.GetResource("ShoppingCart.CustomerEnteredPrice.RangeError"),
                        _priceFormatter.FormatPrice(minimumCustomerEnteredPrice, false, false),
                        _priceFormatter.FormatPrice(maximumCustomerEnteredPrice, false, false)));
                }
            }

            //quantity validation
            var hasQtyWarnings = false;
            if (quantity < productVariant.OrderMinimumQuantity)
            {
                warnings.Add(string.Format(_localizationService.GetResource("ShoppingCart.MinimumQuantity"), productVariant.OrderMinimumQuantity));
                hasQtyWarnings = true;
            }
            if (quantity > productVariant.OrderMaximumQuantity)
            {
                warnings.Add(string.Format(_localizationService.GetResource("ShoppingCart.MaximumQuantity"), productVariant.OrderMaximumQuantity));
                hasQtyWarnings = true;
            }
            var allowedQuantities = productVariant.ParseAllowedQuatities();
            if (allowedQuantities.Length > 0 && !allowedQuantities.Contains(quantity))
            {
                warnings.Add(string.Format(_localizationService.GetResource("ShoppingCart.AllowedQuantities"), string.Join(", ", allowedQuantities)));
            }

            var validateOutOfStock = shoppingCartType == ShoppingCartType.ShoppingCart || !_shoppingCartSettings.AllowOutOfStockItemsToBeAddedToWishlist;
            if (validateOutOfStock && !hasQtyWarnings)
            {
                switch (productVariant.ManageInventoryMethod)
                {
                    case ManageInventoryMethod.DontManageStock:
                        {
                        }
                        break;
                    case ManageInventoryMethod.ManageStock:
                        {
                            if ((BackorderMode)productVariant.BackorderMode == BackorderMode.NoBackorders)
                            {
                                if (productVariant.StockQuantity < quantity)
                                {
                                    int maximumQuantityCanBeAdded = productVariant.StockQuantity;
                                    if (maximumQuantityCanBeAdded <= 0)
                                        warnings.Add(_localizationService.GetResource("ShoppingCart.OutOfStock"));
                                    else
                                        warnings.Add(string.Format(_localizationService.GetResource("ShoppingCart.QuantityExceedsStock"), maximumQuantityCanBeAdded));
                                }
                            }
                        }
                        break;
                    case ManageInventoryMethod.ManageStockByAttributes:
                        {
                            var combination = productVariant
                                .ProductVariantAttributeCombinations
                                .FirstOrDefault(x => _productAttributeParser.AreProductAttributesEqual(x.AttributesXml, selectedAttributes));
                            if (combination != null &&
                                !combination.AllowOutOfStockOrders &&
                                combination.StockQuantity < quantity)
                            {
                                int maximumQuantityCanBeAdded = combination.StockQuantity;
                                if (maximumQuantityCanBeAdded <= 0)
                                    warnings.Add(_localizationService.GetResource("ShoppingCart.OutOfStock"));
                                else
                                    warnings.Add(string.Format(_localizationService.GetResource("ShoppingCart.QuantityExceedsStock"), maximumQuantityCanBeAdded));
                            }
                        }
                        break;
                    default:
                        break;
                }
            }

            //availability dates
            bool availableStartDateError = false;
            if (productVariant.AvailableStartDateTimeUtc.HasValue)
            {
                DateTime now = DateTime.UtcNow;
                DateTime availableStartDateTime = DateTime.SpecifyKind(productVariant.AvailableStartDateTimeUtc.Value, DateTimeKind.Utc);
                if (availableStartDateTime.CompareTo(now) > 0)
                {
                    warnings.Add(_localizationService.GetResource("ShoppingCart.NotAvailable"));
                    availableStartDateError = true;
                }
            }
            if (productVariant.AvailableEndDateTimeUtc.HasValue && !availableStartDateError)
            {
                DateTime now = DateTime.UtcNow;
                DateTime availableEndDateTime = DateTime.SpecifyKind(productVariant.AvailableEndDateTimeUtc.Value, DateTimeKind.Utc);
                if (availableEndDateTime.CompareTo(now) < 0)
                {
                    warnings.Add(_localizationService.GetResource("ShoppingCart.NotAvailable"));
                }
            }
            return warnings;
        }
        protected ProductDetailsModel.ProductVariantModel PrepareProductVariantModel(ProductDetailsModel.ProductVariantModel model, ProductVariant productVariant)
        {
            if (productVariant == null)
                throw new ArgumentNullException("productVariant");

            if (model == null)
                throw new ArgumentNullException("model");

            #region Properties

            model.Id = productVariant.Id;
            model.Name = productVariant.GetLocalized(x => x.Name);
            model.ShowSku = _catalogSettings.ShowProductSku;
            model.Sku = productVariant.Sku;
            model.Description = productVariant.GetLocalized(x => x.Description);
            model.ShowManufacturerPartNumber = _catalogSettings.ShowManufacturerPartNumber;
            model.ManufacturerPartNumber = productVariant.ManufacturerPartNumber;
            model.ShowGtin = _catalogSettings.ShowGtin;
            model.Gtin = productVariant.Gtin;
            model.StockAvailability = productVariant.FormatStockMessage(_localizationService);
            model.PictureModel.FullSizeImageUrl = _pictureService.GetPictureUrl(productVariant.PictureId, 0, false);
            model.PictureModel.ImageUrl = _pictureService.GetPictureUrl(productVariant.PictureId, _mediaSettings.ProductVariantPictureSize, false);
            model.PictureModel.Title = string.Format(_localizationService.GetResource("Media.Product.ImageLinkTitleFormat"), model.Name);
            model.PictureModel.AlternateText = string.Format(_localizationService.GetResource("Media.Product.ImageAlternateTextFormat"), model.Name);
            model.HasSampleDownload = productVariant.IsDownload && productVariant.HasSampleDownload;
            model.IsCurrentCustomerRegistered = _workContext.CurrentCustomer.IsRegistered();
            //back in stock subscriptions)
            if (productVariant.ManageInventoryMethod == ManageInventoryMethod.ManageStock &&
                productVariant.BackorderMode == BackorderMode.NoBackorders &&
                productVariant.AllowBackInStockSubscriptions &&
                productVariant.StockQuantity <= 0)
            {
                //out of stock
                model.DisplayBackInStockSubscription = true;
                model.BackInStockAlreadySubscribed = _backInStockSubscriptionService
                    .FindSubscription(_workContext.CurrentCustomer.Id, productVariant.Id, _storeContext.CurrentStore.Id) != null;
            }

            #endregion

            #region Product variant price
            model.ProductVariantPrice.ProductVariantId = productVariant.Id;
            model.ProductVariantPrice.DynamicPriceUpdate = _catalogSettings.EnableDynamicPriceUpdate;
            if (_permissionService.Authorize(StandardPermissionProvider.DisplayPrices))
            {
                model.ProductVariantPrice.HidePrices = false;
                if (productVariant.CustomerEntersPrice)
                {
                    model.ProductVariantPrice.CustomerEntersPrice = true;
                }
                else
                {
                    if (productVariant.CallForPrice)
                    {
                        model.ProductVariantPrice.CallForPrice = true;
                    }
                    else
                    {
                        decimal taxRate = decimal.Zero;
                        decimal oldPriceBase = _taxService.GetProductPrice(productVariant, productVariant.OldPrice, out taxRate);
                        decimal finalPriceWithoutDiscountBase = _taxService.GetProductPrice(productVariant, _priceCalculationService.GetFinalPrice(productVariant, false), out taxRate);
                        decimal finalPriceWithDiscountBase = _taxService.GetProductPrice(productVariant, _priceCalculationService.GetFinalPrice(productVariant, true), out taxRate);

                        decimal oldPrice = _currencyService.ConvertFromPrimaryStoreCurrency(oldPriceBase, _workContext.WorkingCurrency);
                        decimal finalPriceWithoutDiscount = _currencyService.ConvertFromPrimaryStoreCurrency(finalPriceWithoutDiscountBase, _workContext.WorkingCurrency);
                        decimal finalPriceWithDiscount = _currencyService.ConvertFromPrimaryStoreCurrency(finalPriceWithDiscountBase, _workContext.WorkingCurrency);

                        if (finalPriceWithoutDiscountBase != oldPriceBase && oldPriceBase > decimal.Zero)
                            model.ProductVariantPrice.OldPrice = _priceFormatter.FormatPrice(oldPrice);

                        model.ProductVariantPrice.Price = _priceFormatter.FormatPrice(finalPriceWithoutDiscount);

                        if (finalPriceWithoutDiscountBase != finalPriceWithDiscountBase)
                            model.ProductVariantPrice.PriceWithDiscount = _priceFormatter.FormatPrice(finalPriceWithDiscount);

                        model.ProductVariantPrice.PriceValue = finalPriceWithoutDiscount;
                        model.ProductVariantPrice.PriceWithDiscountValue = finalPriceWithDiscount;
                    }
                }
            }
            else
            {
                model.ProductVariantPrice.HidePrices = true;
                model.ProductVariantPrice.OldPrice = null;
                model.ProductVariantPrice.Price = null;
            }
            #endregion

            #region 'Add to cart' model

            model.AddToCart.ProductVariantId = productVariant.Id;

            //quantity
            model.AddToCart.EnteredQuantity = productVariant.OrderMinimumQuantity;

            //'add to cart', 'add to wishlist' buttons
            model.AddToCart.DisableBuyButton = productVariant.DisableBuyButton || !_permissionService.Authorize(StandardPermissionProvider.EnableShoppingCart);
            model.AddToCart.DisableWishlistButton = productVariant.DisableWishlistButton || !_permissionService.Authorize(StandardPermissionProvider.EnableWishlist);
            if (!_permissionService.Authorize(StandardPermissionProvider.DisplayPrices))
            {
                model.AddToCart.DisableBuyButton = true;
                model.AddToCart.DisableWishlistButton = true;
            }
            //pre-order
            model.AddToCart.AvailableForPreOrder = productVariant.AvailableForPreOrder;

            //customer entered price
            model.AddToCart.CustomerEntersPrice = productVariant.CustomerEntersPrice;
            if (model.AddToCart.CustomerEntersPrice)
            {
                decimal minimumCustomerEnteredPrice = _currencyService.ConvertFromPrimaryStoreCurrency(productVariant.MinimumCustomerEnteredPrice, _workContext.WorkingCurrency);
                decimal maximumCustomerEnteredPrice = _currencyService.ConvertFromPrimaryStoreCurrency(productVariant.MaximumCustomerEnteredPrice, _workContext.WorkingCurrency);

                model.AddToCart.CustomerEnteredPrice = minimumCustomerEnteredPrice;
                model.AddToCart.CustomerEnteredPriceRange = string.Format(_localizationService.GetResource("Products.EnterProductPrice.Range"),
                    _priceFormatter.FormatPrice(minimumCustomerEnteredPrice, false, false),
                    _priceFormatter.FormatPrice(maximumCustomerEnteredPrice, false, false));
            }
            //allowed quantities
            var allowedQuantities = productVariant.ParseAllowedQuatities();
            foreach (var qty in allowedQuantities)
            {
                model.AddToCart.AllowedQuantities.Add(new SelectListItem()
                {
                    Text = qty.ToString(),
                    Value = qty.ToString()
                });
            }

            #endregion

            #region Gift card

            model.GiftCard.IsGiftCard = productVariant.IsGiftCard;
            if (model.GiftCard.IsGiftCard)
            {
                model.GiftCard.GiftCardType = productVariant.GiftCardType;
                model.GiftCard.SenderName = _workContext.CurrentCustomer.GetFullName();
                model.GiftCard.SenderEmail = _workContext.CurrentCustomer.Email;
            }

            #endregion

            #region Product attributes

            var productVariantAttributes = _productAttributeService.GetProductVariantAttributesByProductVariantId(productVariant.Id);
            foreach (var attribute in productVariantAttributes)
            {
                var pvaModel = new ProductDetailsModel.ProductVariantModel.ProductVariantAttributeModel()
                    {
                        Id = attribute.Id,
                        ProductVariantId = productVariant.Id,
                        ProductAttributeId = attribute.ProductAttributeId,
                        Name = attribute.ProductAttribute.GetLocalized(x => x.Name),
                        Description = attribute.ProductAttribute.GetLocalized(x => x.Description),
                        TextPrompt = attribute.TextPrompt,
                        IsRequired = attribute.IsRequired,
                        AttributeControlType = attribute.AttributeControlType,
                        AllowedFileExtensions = _catalogSettings.FileUploadAllowedExtensions,
                    };

                if (attribute.ShouldHaveValues())
                {
                    //values
                    var pvaValues = _productAttributeService.GetProductVariantAttributeValues(attribute.Id);
                    foreach (var pvaValue in pvaValues)
                    {
                        var pvaValueModel = new ProductDetailsModel.ProductVariantModel.ProductVariantAttributeValueModel()
                        {
                            Id = pvaValue.Id,
                            Name = pvaValue.GetLocalized(x => x.Name),
                            ColorSquaresRgb = pvaValue.ColorSquaresRgb, //used with "Color squares" attribute type
                            IsPreSelected = pvaValue.IsPreSelected,
                        };
                        pvaModel.Values.Add(pvaValueModel);

                        //display price if allowed
                        if (_permissionService.Authorize(StandardPermissionProvider.DisplayPrices))
                        {
                            decimal taxRate = decimal.Zero;
                            decimal priceAdjustmentBase = _taxService.GetProductPrice(productVariant, pvaValue.PriceAdjustment, out taxRate);
                            decimal priceAdjustment = _currencyService.ConvertFromPrimaryStoreCurrency(priceAdjustmentBase, _workContext.WorkingCurrency);
                            if (priceAdjustmentBase > decimal.Zero)
                                pvaValueModel.PriceAdjustment = "+" + _priceFormatter.FormatPrice(priceAdjustment, false, false);
                            else if (priceAdjustmentBase < decimal.Zero)
                                pvaValueModel.PriceAdjustment = "-" + _priceFormatter.FormatPrice(-priceAdjustment, false, false);

                            pvaValueModel.PriceAdjustmentValue = priceAdjustment;
                        }
                    }
                }

                model.ProductVariantAttributes.Add(pvaModel);
            }

            #endregion

            return model;
        }