private void CheckProduct(Product product,User user)
        {
            ICategoryService categoryService = new CategoryService();
            IProductService productService = new ProductService();
            IConfiguration configuration = ConfigurationService.GetInstance();
            ICollection<Category> categorys = categoryService.GetCategorysForAProduct(product);

            int nrOfAuctions = 0;
            foreach(Category category in categorys)
            {
                ICollection<Category> parentCAtegorys = categoryService.getParents(category.IdCategory);
                ICollection<Product> products;
                foreach(Category parentCategory in parentCAtegorys)
                {
                    products = productService.GetAllProductsOfACategory(category);
                    foreach(Product productCat in products)
                    {
                        Auction auction = productService.GetAuctionOfAProduct(productCat);
                        if (auction != null && auction.User.Equals(user))
                            nrOfAuctions++;
                    }
                }
            }

            if(nrOfAuctions >= configuration.GetValue(Constants.MAX_NR_OF_AUCTION_ASSOCIATE_WITH_CATEGORY))
                throw new AuctionException("The auction can not be added because the number of auctions per category was exceeded");
        }
 public void GetProductsOfACategory()
 {
     CategoryService categoryService = new CategoryService();
     ProductService productService = new ProductService();
     Category category = categoryService.GetCategoryById(8);
     ICollection<Product> products = productService.GetAllProductsOfACategory(category);
     Assert.AreEqual(products.Count(), 2);
 }