public void BuildComboItemFailsWithNotEnoughtStock()
        {
            ComboItemProxy proxy = new ComboItemProxy();

            ComboItemDto comboItemDto = this.GetComboItem01();

            proxy.Insert(comboItemDto);
            ComboItemDto         comboItem = (ComboItemDto)proxy.GetByUid(comboItemDto.Uid);
            BuildComboItemResult result    = proxy.Build(comboItemDto.Uid, 1000);

            Assert.AreEqual(1, result.Errors.Count);
            ErrorInfo error = (ErrorInfo)result.Errors[0];

            Assert.AreEqual("InvalidInventoryItemStockOnHandException", error.Type);
            StringAssert.StartsWith("Unable to complete the requested operation as it will cause negative stock-on-hand for ", error.Message);
        }
        public void BuildComboItem()
        {
            ComboItemProxy proxy = new ComboItemProxy();

            ComboItemDto comboItemDto = this.GetComboItem01();

            proxy.Insert(comboItemDto);
            ComboItemDto comboItem = (ComboItemDto)proxy.GetByUid(comboItemDto.Uid);

            // We need to insert stock first using a purchase
            CrudProxy  invoiceProxy = new InvoiceProxy();
            InvoiceDto dto          = new InvoiceDto(TransactionType.Purchase, InvoiceLayout.Item);

            dto.Date                = DateTime.Today.Date;
            dto.ContactUid          = this.MrSmith.Uid;
            dto.Summary             = "Add stock do we can build ComboItems";
            dto.Notes               = "From REST";
            dto.DueOrExpiryDate     = dto.Date.AddMonths(1);
            dto.Status              = InvoiceStatus.Invoice;
            dto.InvoiceNumber       = "I123";
            dto.PurchaseOrderNumber = "<Auto Number>";

            decimal unitsToBuild = 12.25M;

            foreach (ComboItemLineItemDto itemInCombo in comboItem.Items)
            {   // "purchase" all the items that are part of this combo item so we have valid stock
                ItemInvoiceItemDto item = new ItemInvoiceItemDto();
                item.Quantity         = itemInCombo.Quantity * unitsToBuild;
                item.InventoryItemUid = itemInCombo.Uid;
                item.Description      = "Purchasing: " + itemInCombo.Code;
                item.TaxCode          = TaxCode.ExpInclGst;
                item.UnitPriceInclTax = 99.95M;
                dto.Items.Add(item);
            }
            invoiceProxy.Insert(dto);

            // Download stock info before
            InventoryItemProxy inventoryItemProxy = new InventoryItemProxy();
            InventoryItemDto   inventoryItem      = (InventoryItemDto)inventoryItemProxy.GetByUid(comboItemDto.Uid);
            decimal            stockOnHand        = inventoryItem.StockOnHand;


            // Build the item!
            BuildComboItemResult result = proxy.Build(comboItemDto.Uid, unitsToBuild);

            Assert.AreNotEqual(0, result.Uid);
            Assert.IsNotNull(result.LastUpdatedUid);

            inventoryItem = (InventoryItemDto)inventoryItemProxy.GetByUid(comboItemDto.Uid);
            decimal newStockOnHand = inventoryItem.StockOnHand;

            Assert.AreEqual(stockOnHand + unitsToBuild, newStockOnHand, "We have one extra item in stock");

            // Read Inventory Transfer details
            InventoryTransferProxy transferProxy = new InventoryTransferProxy();
            InventoryTransferDto   transfer      = (InventoryTransferDto)transferProxy.GetByUid(result.Uid);

            Assert.AreEqual(comboItem.Items.Count + 1, transfer.Items.Count); // +1 as we have the combo item the first one

            // confirm first item is the combo with +1
            InventoryTransferItemDto comboItemTransfer = (InventoryTransferItemDto)transfer.Items[0];

            Assert.AreEqual(comboItemDto.Uid, comboItemTransfer.InventoryItemUid);
            Assert.AreEqual(unitsToBuild, comboItemTransfer.Quantity);

            for (int i = 0; i < comboItem.Items.Count; i++)
            {
                ComboItemLineItemDto     line = comboItem.Items[i];
                InventoryTransferItemDto item = (InventoryTransferItemDto)transfer.Items[i + 1];
                Assert.AreEqual(line.Uid, item.InventoryItemUid);
                Assert.AreEqual(line.Quantity * unitsToBuild, -item.Quantity);
            }
        }