fixed handling UnitQuantities (BasisQuantity)

Author: stephanstapel

ZUGFeRD-Test/ZUGFeRD21Tests.cs

@@ -1760,9 +1760,9 @@ public void TestBasisQuantityMultiple()
                                                       billedQuantity: 50,
                                                       taxType: TaxTypes.VAT,
                                                       categoryCode: TaxCategoryCodes.S,
-                                                      taxPercent: 7
+                                                      taxPercent: 7,
+                                                      unitQuantity: 10
                                                       );
-            tli.UnitQuantity = 10;
             MemoryStream ms = new MemoryStream();
 
             desc.Save(ms, ZUGFeRDVersion.Version21, Profile.XRechnung);

ZUGFeRD/InvoiceDescriptor1Writer.cs

@@ -574,6 +574,10 @@ public override void Save(InvoiceDescriptor descriptor, Stream stream)
                 else if (tradeLineItem.NetUnitPrice.HasValue)
                 {
                     _total = tradeLineItem.NetUnitPrice.Value * tradeLineItem.BilledQuantity;
+                    if (tradeLineItem.UnitQuantity.HasValue && (tradeLineItem.UnitQuantity.Value != 0))
+                    {
+                        _total /= tradeLineItem.UnitQuantity.Value;
+                    }
                 }
 
                 _writeElementWithAttribute(Writer, "ram:LineTotalAmount", "currencyID", this.Descriptor.Currency.EnumToString(), _formatDecimal(_total));

ZUGFeRD/InvoiceDescriptor20Writer.cs

@@ -351,6 +351,10 @@ public override void Save(InvoiceDescriptor descriptor, Stream stream)
                 else if (tradeLineItem.NetUnitPrice.HasValue)
                 {
                     _total = tradeLineItem.NetUnitPrice.Value * tradeLineItem.BilledQuantity;
+                    if (tradeLineItem.UnitQuantity.HasValue && (tradeLineItem.UnitQuantity.Value != 0))
+                    {
+                        _total /= tradeLineItem.UnitQuantity.Value;
+                    }
                 }
 
                 Writer.WriteElementString("ram:LineTotalAmount", _formatDecimal(_total));

ZUGFeRD/InvoiceDescriptor21Writer.cs

@@ -410,7 +410,11 @@ public override void Save(InvoiceDescriptor descriptor, Stream stream)
                 }
                 else if (tradeLineItem.NetUnitPrice.HasValue)
                 {
-                    _total = tradeLineItem.NetUnitPrice.Value * tradeLineItem.BilledQuantity;
+                    _total = tradeLineItem.NetUnitPrice.Value * tradeLineItem.BilledQuantity;                    
+                    if (tradeLineItem.UnitQuantity.HasValue && (tradeLineItem.UnitQuantity.Value != 0))
+                    {
+                        _total /= tradeLineItem.UnitQuantity.Value;
+                    }       
                 }
 
                 Writer.WriteStartElement("ram:LineTotalAmount", Profile.Basic | Profile.Comfort | Profile.Extended | Profile.XRechnung1 | Profile.XRechnung);