Codebasis als Dateien ins Arbeitsrepo statt als Gitlink

QuellCode/CentronERP war nur als Gitlink (Submodul-Referenz auf 79c1142)
getrackt, ohne .gitmodules und ohne erreichbares Remote. Der
Untersuchungsgegenstand der Versuchsreihe war damit nicht reproduzierbar
gesichert: Ein Klon haette ein leeres Verzeichnis erhalten, und die Belege
der 3.287 Anforderungen waeren nicht ueberpruefbar gewesen.

Umstellung:
- Historie nach c:\DEV\CentronERP_git_snapshot_79c1142 ausgelagert
  (vollstaendig lesbar, enthaelt 79c1142 und Vorgaenger 89ccfd6)
- Gitlink aus dem Index entfernt
- Dateiinhalt aufgenommen: 24.557 Dateien, rund 333 MB

Die verschachtelte .gitignore der Codebasis gilt weiter, Build-Artefakte
bleiben ausgeschlossen. Details in Versuche/Versuch_01/_Codebasis-Nachweis.md

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/TicketTests/Ticket138418/Ticket138418Tests.cs

@@ -0,0 +1,96 @@
+using System.Linq;
+using Centron.BusinessLogic.Administration.Company;
+using Centron.BusinessLogic.Sales.Receipts.DataAndResults;
+using Centron.BusinessLogic.WebServices.Sales.Receipts;
+using Centron.Data.WebServices.Sales.Receipts.Invoices;
+using Centron.Interfaces;
+using Centron.Interfaces.Administration.Environment;
+using Centron.Interfaces.BL;
+using Centron.Tests.EndToEnd.Infrastructure;
+using Xunit;
+using Xunit.Abstractions;
+
+namespace Centron.Tests.EndToEnd.TicketTests.Ticket138418;
+
+public class Ticket138418Tests : EndToEndTest
+{
+    public Ticket138418Tests(ITestOutputHelper testOutputHelper) 
+        : base(testOutputHelper)
+    {
+        this.Verifier.Settings.IgnoreColumn("Date");
+    }
+
+    public override void Execute()
+    {
+        // In this ticket the problem was, that in the ContractItemsContingent table, it would save the old incorrect invoice-number
+        // Not the correct one from the 0,00 € invoice-number-group that was actually used for the invoice
+        
+        this.PrepareDatabase();
+
+        var invoice = this.CreateInvoice();
+        Assert.Equal(40287, invoice.Number); //New invoice should have a number from the default number-group
+
+        var savedInvoice = this.SaveInvoice(invoice);
+        Assert.Equal(22001, savedInvoice.Number); //When it's saved we should use a number from the 0,00 € invoice-number-group
+        
+        this.Verifier.VerifyTable("Items", "ContractItemsContingent", $"AssetI3D = {savedInvoice.I3D} AND AssetKind = 4");
+    }
+
+    private ReceiptInvoiceDTO SaveInvoice(ReceiptInvoiceDTO invoice)
+    {
+        var savedInvoice = (ReceiptInvoiceDTO)this.WithSession(s => s.GetBL<ReceiptWebServiceBL>().SaveReceipt(
+            invoice,
+            this.GetLoggedInUser().User,
+            new SaveReceiptData(),
+            autoLockIfNewReceipt: false,
+            CreatedThroughApplication.WebServices,
+            receiptTemplateFolderI3D: null)).ThrowIfError().Receipt;
+
+        return savedInvoice;
+    }
+
+    private ReceiptInvoiceDTO CreateInvoice()
+    {
+        // Create new invoice
+        var invoice = (ReceiptInvoiceDTO)this.WithSession(s => s.GetBL<ReceiptWebServiceBL>().CreateNewReceipt(
+            CentronObjectKindNumeric.InvoiceClass,
+            this.GetLoggedInUser(),
+            customerI3D: 10000,
+            new CreateReceiptData
+            {
+                IgnoreCallbacks = true,
+            },
+            addressI3D: null,
+            contactPersonI3D: null,
+            insertSalutationAndAgreement: false,
+            ignoreDefaultContract: false,
+            insertCustomerDiscount: false)).ThrowIfError().Receipt;
+
+        // Assign contingent-contract to the invoice
+        invoice.ContractI3D = 35;
+
+        // Create items
+        var items = this.WithSession(s => s.GetBL<ReceiptItemWebServiceBL>().CreateArticleReceiptItems(
+            invoice,
+            isExternalArticle: false,
+            articleI3D: 5,
+            externalArticleKind: null,
+            externalArticleId: null,
+            warehouseI3D: -1,
+            this.GetLoggedInUser())).ThrowIfError();
+        invoice.Items.AddRange(items.ReceiptItems.Cast<ReceiptInvoiceItemDTO>());
+        
+        return invoice;
+    }
+
+    private void PrepareDatabase()
+    {
+        // Setup 0,00 € invoice-number-group
+        this.WithSession(s => s.GetBL<NumberGroupBL>().RefreshAllNumberGroups());
+        this.Sql("UPDATE dbo.Nummernkreis SET BereichVon = 22000, BereichBis = 22999, Aktuell = 22000, Intervall = 1 WHERE I3D = 56"); // Configure the 0,00 € invoice-number-group
+        
+        // Reset contingent-settings to work for all contingent-contracts and service-articles
+        this.Sql($"DELETE FROM dbo.GroupToContingent");
+        this.Sql($"INSERT INTO dbo.GroupToContingent (ContractI3D, Kind, ElementI3D) VALUES (0, 1, 3)");
+    }
+}