public void AddReceiptPancake()
        {
            var service = new ReceiptService(new FakeFridgeItemRepository(), new FakeReceiptRepository());
            var receipt = new Receipt();
            var pancake = new Receipt {
                Name = PancakeReceipt
            };
            var eggItem = new Item
            {
                Name     = "Egg",
                Quantity = new Quantity {
                    Unit = "P", Total = 3
                }
            };
            var milkItem = new Item
            {
                Name     = "Milk",
                Quantity = new Quantity {
                    Unit = "L", Total = new decimal(0.7)
                }
            };
            var flourItem = new Item
            {
                Name     = "Flour",
                Quantity = new Quantity {
                    Unit = "L", Total = new decimal(0.5)
                }
            };

            pancake.Ingredients.Add(eggItem);
            pancake.Ingredients.Add(milkItem);
            pancake.Ingredients.Add(flourItem);

            service.AddRecipt(receipt);

            var result = service.GetReceipt(PancakeReceipt);

            Assert.AreEqual(result.Name, PancakeReceipt);
        }