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/Ticket126856/TicketTest126856Test.cs

@@ -0,0 +1,85 @@
+using Centron.BusinessLogic;
+using Centron.BusinessLogic.EmployeeArea;
+using Centron.BusinessLogic.Warehousing;
+using Centron.BusinessLogic.WebServices.Warehousing;
+using Centron.Data.Entities.Administration.Logins;
+using Centron.Data.WebServices.Warehousing;
+using Centron.Tests.EndToEnd.Infrastructure;
+using Xunit.Abstractions;
+
+namespace Centron.Tests.EndToEnd.TicketTests.Ticket126856;
+
+public class TicketTest126856Test : EndToEndTest
+{
+    public TicketTest126856Test(ITestOutputHelper testOutputHelper) : base(testOutputHelper)
+    {
+    }
+
+    
+    public override void Execute()
+    {
+        this.LoadAndSaveAnArticle();
+    }
+
+    private int ArticleI3D = 52;
+    private const int APPUSERI3D = 11;
+
+    private void LoadAndSaveAnArticle()
+    {
+        var user = WithSession(f => f.GetBL<AppUserBL>().GetAppUser(f => f.I3D == APPUSERI3D));
+
+            
+        var article1 = WithSession(f => f.GetBL<ArticleWebServiceBL>().GetArticleByArticleI3D(ArticleI3D));
+        // change this property to ensure we run into the problematic code
+        article1.ScanBarcode = !article1.ScanBarcode;
+
+        // Should fail, because there is stock available for the article. In this case it is forbidden to change the ScanBarcode property
+        var result1 = WithSession(f => f.GetBL<ArticleWebServiceBL>().SaveArticle(article1,  new LoggedInUser(user)));
+        this.Verifier.Verify("LoadAndSavedArticle_failed", result1);
+
+        // set all barcodes to 'booked out manually' so that the stock check is bypassed
+        base.Sql("UPDATE Barcode SET Status = 20 WHERE ArtikelI3D = 52 AND Status IN (1,2, 8)");
+        base.Sql("UPDATE ARTIK SET Menge = 0 WHERE I3D = 52");
+
+        //sometimes the changes tracker does not work right and bring the 'article has been changed by somebody else'-message, even if it's not the case
+        //so we save here to see, if this is happening now
+        result1 = WithSession(f => f.GetBL<ArticleWebServiceBL>().SaveArticle(article1, new LoggedInUser(user)));
+        this.Verifier.Verify("LoadAndSavedArticle", result1);
+
+        var article2 = WithSession(f => f.GetBL<ArticleWebServiceBL>().GetArticleByArticleI3D(ArticleI3D));
+        article2.ScanBarcode = !article2.ScanBarcode;
+            
+        //sometime volume prices are not saved
+        article2.VolumePrices.Add(new ArticleVolumePricesDTO()
+        {
+            State = 0,
+            EK = (decimal)12.34,
+            FromAmount = 2,
+            VK1 = (decimal)56.78,
+            ArticleI3D = article2.I3D
+        });
+        article2.VolumePrices.Add(new ArticleVolumePricesDTO()
+        {
+            State = 1,
+            EK = (decimal)120.34,
+            FromAmount = 42,
+            VK1 = (decimal)560.78,
+            ArticleI3D = article2.I3D
+        });
+        var result2 = WithSession(f =>f.GetBL<ArticleWebServiceBL>().SaveArticle(article2,  new LoggedInUser(user)));
+        this.Verifier.Verify("LoadAndSavedArticle_The_Second", result2);
+
+            
+            
+        var article3 = WithSession(f => f.GetBL<ArticleWebServiceBL>().GetArticleByArticleI3D(ArticleI3D));
+        article3.ScanBarcode = !article3.ScanBarcode;
+
+        //just check the first case again, because it does not always occur
+        var result3 = WithSession(f => f.GetBL<ArticleWebServiceBL>().SaveArticle(article3,  new LoggedInUser(user)));
+        this.Verifier.Verify("LoadAndSavedArticle_Third_times_a_charm", result3);
+            
+        // and because Easter is just around the corner, here is a bad pun
+        // What kind of jewelry does the easter bunny wear ?
+        // 24 carrot gold
+    }
+}