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/Tests/ReceiptProvisionLevels/1_Levels_Table.expected.txt

@@ -0,0 +1,34 @@
+[
+  {
+    I3D: '1',
+    EmployeeI3D: '10',
+    FromPrice: '0,0000000',
+    ProvisionPercentage: '2,0000000',
+    OverwriteLowerLevels: 'False',
+    Bonus: null
+  },
+  {
+    I3D: '2',
+    EmployeeI3D: '10',
+    FromPrice: '500,0000000',
+    ProvisionPercentage: '3,0000000',
+    OverwriteLowerLevels: 'True',
+    Bonus: '100,0000000'
+  },
+  {
+    I3D: '3',
+    EmployeeI3D: '10',
+    FromPrice: '1000,0000000',
+    ProvisionPercentage: '4,0000000',
+    OverwriteLowerLevels: 'False',
+    Bonus: '200,0000000'
+  },
+  {
+    I3D: '4',
+    EmployeeI3D: '10',
+    FromPrice: '2000,0000000',
+    ProvisionPercentage: '5,0000000',
+    OverwriteLowerLevels: 'False',
+    Bonus: '300,0000000'
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/2_Levels.expected.txt

@@ -0,0 +1,34 @@
+[
+  {
+    Bonus: null,
+    EmployeeI3D: 10,
+    FromPrice: 0.0000000,
+    I3D: 1,
+    OverwriteLowerLevels: false,
+    ProvisionPercentage: 2.0000000
+  },
+  {
+    Bonus: 100.0000000,
+    EmployeeI3D: 10,
+    FromPrice: 500.0000000,
+    I3D: 2,
+    OverwriteLowerLevels: true,
+    ProvisionPercentage: 3.0000000
+  },
+  {
+    Bonus: 200.0000000,
+    EmployeeI3D: 10,
+    FromPrice: 1000.0000000,
+    I3D: 3,
+    OverwriteLowerLevels: false,
+    ProvisionPercentage: 4.0000000
+  },
+  {
+    Bonus: 300.0000000,
+    EmployeeI3D: 10,
+    FromPrice: 2000.0000000,
+    I3D: 4,
+    OverwriteLowerLevels: false,
+    ProvisionPercentage: 5.0000000
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/3_Price_3000.expected.txt

@@ -0,0 +1,25 @@
+[
+  {
+    I3D: '3',
+    ReceiptI3D: '4408',
+    ReceiptKind: '4',
+    Receiver: 'FixedEmployee',
+    EmployeeI3D: '10',
+    ProvisionPercentage: null,
+    Source: 'All',
+    ActualEmployeeI3D: '10',
+    ActualProvision: '735,0000000',
+    SharePercentage: '100,0000000',
+    Description: null,
+    Value: 'Sales',
+    SourceMaterialGroups: 'null',
+    ActualPrice: '3000,0000000',
+    FilterEmployeeI3D: null,
+    ActualPriceSales: '3000,0000000',
+    ActualPriceEarnings: null,
+    ActualProvisionSales: '735,0000000',
+    ActualProvisionEarnings: null,
+    GroupID: null,
+    ActualProvisionPercentage: '24,5000000'
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/3_Price_400.expected.txt

@@ -0,0 +1,25 @@
+[
+  {
+    I3D: '1',
+    ReceiptI3D: '4408',
+    ReceiptKind: '4',
+    Receiver: 'FixedEmployee',
+    EmployeeI3D: '10',
+    ProvisionPercentage: null,
+    Source: 'All',
+    ActualEmployeeI3D: '10',
+    ActualProvision: '8,0000000',
+    SharePercentage: '100,0000000',
+    Description: null,
+    Value: 'Sales',
+    SourceMaterialGroups: 'null',
+    ActualPrice: '400,0000000',
+    FilterEmployeeI3D: null,
+    ActualPriceSales: '400,0000000',
+    ActualPriceEarnings: null,
+    ActualProvisionSales: '8,0000000',
+    ActualProvisionEarnings: null,
+    GroupID: null,
+    ActualProvisionPercentage: '2,0000000'
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/3_Price_800.expected.txt

@@ -0,0 +1,25 @@
+[
+  {
+    I3D: '2',
+    ReceiptI3D: '4408',
+    ReceiptKind: '4',
+    Receiver: 'FixedEmployee',
+    EmployeeI3D: '10',
+    ProvisionPercentage: null,
+    Source: 'All',
+    ActualEmployeeI3D: '10',
+    ActualProvision: '124,0000000',
+    SharePercentage: '100,0000000',
+    Description: null,
+    Value: 'Sales',
+    SourceMaterialGroups: 'null',
+    ActualPrice: '800,0000000',
+    FilterEmployeeI3D: null,
+    ActualPriceSales: '800,0000000',
+    ActualPriceEarnings: null,
+    ActualProvisionSales: '124,0000000',
+    ActualProvisionEarnings: null,
+    GroupID: null,
+    ActualProvisionPercentage: '15,5000000'
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/4.1_Price_600.expected.txt

@@ -0,0 +1,48 @@
+[
+  {
+    I3D: '4',
+    ReceiptI3D: '4408',
+    ReceiptKind: '4',
+    Receiver: 'FixedEmployee',
+    EmployeeI3D: '10',
+    ProvisionPercentage: null,
+    Source: 'All',
+    ActualEmployeeI3D: '10',
+    ActualProvision: '12,0000000',
+    SharePercentage: '100,0000000',
+    Description: null,
+    Value: 'Sales',
+    SourceMaterialGroups: 'null',
+    ActualPrice: '400,0000000',
+    FilterEmployeeI3D: null,
+    ActualPriceSales: '400,0000000',
+    ActualPriceEarnings: null,
+    ActualProvisionSales: '12,0000000',
+    ActualProvisionEarnings: null,
+    GroupID: null,
+    ActualProvisionPercentage: '3,0000000'
+  },
+  {
+    I3D: '5',
+    ReceiptI3D: '5414',
+    ReceiptKind: '4',
+    Receiver: 'FixedEmployee',
+    EmployeeI3D: '10',
+    ProvisionPercentage: null,
+    Source: 'All',
+    ActualEmployeeI3D: '10',
+    ActualProvision: '106,0000000',
+    SharePercentage: '100,0000000',
+    Description: null,
+    Value: 'Sales',
+    SourceMaterialGroups: 'null',
+    ActualPrice: '200,0000000',
+    FilterEmployeeI3D: null,
+    ActualPriceSales: '200,0000000',
+    ActualPriceEarnings: null,
+    ActualProvisionSales: '106,0000000',
+    ActualProvisionEarnings: null,
+    GroupID: null,
+    ActualProvisionPercentage: '53,0000000'
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/4.2_Price_450.expected.txt

@@ -0,0 +1,48 @@
+[
+  {
+    I3D: '4',
+    ReceiptI3D: '4408',
+    ReceiptKind: '4',
+    Receiver: 'FixedEmployee',
+    EmployeeI3D: '10',
+    ProvisionPercentage: null,
+    Source: 'All',
+    ActualEmployeeI3D: '10',
+    ActualProvision: '8,0000000',
+    SharePercentage: '100,0000000',
+    Description: null,
+    Value: 'Sales',
+    SourceMaterialGroups: 'null',
+    ActualPrice: '400,0000000',
+    FilterEmployeeI3D: null,
+    ActualPriceSales: '400,0000000',
+    ActualPriceEarnings: null,
+    ActualProvisionSales: '8,0000000',
+    ActualProvisionEarnings: null,
+    GroupID: null,
+    ActualProvisionPercentage: '2,0000000'
+  },
+  {
+    I3D: '6',
+    ReceiptI3D: '5414',
+    ReceiptKind: '4',
+    Receiver: 'FixedEmployee',
+    EmployeeI3D: '10',
+    ProvisionPercentage: null,
+    Source: 'All',
+    ActualEmployeeI3D: '10',
+    ActualProvision: '1,0000000',
+    SharePercentage: '100,0000000',
+    Description: null,
+    Value: 'Sales',
+    SourceMaterialGroups: 'null',
+    ActualPrice: '50,0000000',
+    FilterEmployeeI3D: null,
+    ActualPriceSales: '50,0000000',
+    ActualPriceEarnings: null,
+    ActualProvisionSales: '1,0000000',
+    ActualProvisionEarnings: null,
+    GroupID: null,
+    ActualProvisionPercentage: '2,0000000'
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/5.1_Before.expected.txt

@@ -0,0 +1 @@
+[]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/5.2_OldEmployee.expected.txt

@@ -0,0 +1,25 @@
+[
+  {
+    I3D: '7',
+    ReceiptI3D: '4408',
+    ReceiptKind: '4',
+    Receiver: 'FixedEmployee',
+    EmployeeI3D: '10',
+    ProvisionPercentage: null,
+    Source: 'All',
+    ActualEmployeeI3D: '10',
+    ActualProvision: '335,0000000',
+    SharePercentage: '100,0000000',
+    Description: null,
+    Value: 'Sales',
+    SourceMaterialGroups: 'null',
+    ActualPrice: '1000,0000000',
+    FilterEmployeeI3D: null,
+    ActualPriceSales: '1000,0000000',
+    ActualPriceEarnings: null,
+    ActualProvisionSales: '335,0000000',
+    ActualProvisionEarnings: null,
+    GroupID: null,
+    ActualProvisionPercentage: '33,5000000'
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/5.3_NewEmployee.expected.txt

@@ -0,0 +1,25 @@
+[
+  {
+    I3D: '8',
+    ReceiptI3D: '4408',
+    ReceiptKind: '4',
+    Receiver: 'FixedEmployee',
+    EmployeeI3D: '20',
+    ProvisionPercentage: null,
+    Source: 'All',
+    ActualEmployeeI3D: '20',
+    ActualProvision: '0,0000000',
+    SharePercentage: '100,0000000',
+    Description: null,
+    Value: 'Sales',
+    SourceMaterialGroups: 'null',
+    ActualPrice: '1000,0000000',
+    FilterEmployeeI3D: null,
+    ActualPriceSales: '1000,0000000',
+    ActualPriceEarnings: null,
+    ActualProvisionSales: '0,0000000',
+    ActualProvisionEarnings: null,
+    GroupID: null,
+    ActualProvisionPercentage: '0,0000000'
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/6.1_NewMonth.expected.txt

@@ -0,0 +1,48 @@
+[
+  {
+    I3D: '10',
+    ReceiptI3D: '5414',
+    ReceiptKind: '4',
+    Receiver: 'FixedEmployee',
+    EmployeeI3D: '10',
+    ProvisionPercentage: null,
+    Source: 'All',
+    ActualEmployeeI3D: '10',
+    ActualProvision: '4,0000000',
+    SharePercentage: '100,0000000',
+    Description: null,
+    Value: 'Sales',
+    SourceMaterialGroups: 'null',
+    ActualPrice: '200,0000000',
+    FilterEmployeeI3D: null,
+    ActualPriceSales: '200,0000000',
+    ActualPriceEarnings: null,
+    ActualProvisionSales: '4,0000000',
+    ActualProvisionEarnings: null,
+    GroupID: null,
+    ActualProvisionPercentage: '2,0000000'
+  },
+  {
+    I3D: '11',
+    ReceiptI3D: '4408',
+    ReceiptKind: '4',
+    Receiver: 'FixedEmployee',
+    EmployeeI3D: '10',
+    ProvisionPercentage: null,
+    Source: 'All',
+    ActualEmployeeI3D: '10',
+    ActualProvision: '0,0000000',
+    SharePercentage: '100,0000000',
+    Description: null,
+    Value: 'Sales',
+    SourceMaterialGroups: 'null',
+    ActualPrice: '0,0000000',
+    FilterEmployeeI3D: null,
+    ActualPriceSales: '0,0000000',
+    ActualPriceEarnings: null,
+    ActualProvisionSales: '0,0000000',
+    ActualProvisionEarnings: null,
+    GroupID: null,
+    ActualProvisionPercentage: '2,0000000'
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/7_Levels_Table_NoZero.expected.txt

@@ -0,0 +1,18 @@
+[
+  {
+    I3D: '5',
+    EmployeeI3D: '10',
+    FromPrice: '500,0000000',
+    ProvisionPercentage: '3,0000000',
+    OverwriteLowerLevels: 'False',
+    Bonus: null
+  },
+  {
+    I3D: '6',
+    EmployeeI3D: '10',
+    FromPrice: '1000,0000000',
+    ProvisionPercentage: '4,0000000',
+    OverwriteLowerLevels: 'False',
+    Bonus: null
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/7_Price_400_BelowFirstTier.expected.txt

@@ -0,0 +1,25 @@
+[
+  {
+    I3D: '12',
+    ReceiptI3D: '4408',
+    ReceiptKind: '4',
+    Receiver: 'FixedEmployee',
+    EmployeeI3D: '10',
+    ProvisionPercentage: null,
+    Source: 'All',
+    ActualEmployeeI3D: '10',
+    ActualProvision: '0,0000000',
+    SharePercentage: '100,0000000',
+    Description: null,
+    Value: 'Sales',
+    SourceMaterialGroups: 'null',
+    ActualPrice: '400,0000000',
+    FilterEmployeeI3D: null,
+    ActualPriceSales: '400,0000000',
+    ActualPriceEarnings: null,
+    ActualProvisionSales: '0,0000000',
+    ActualProvisionEarnings: null,
+    GroupID: null,
+    ActualProvisionPercentage: '0,0000000'
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/8.1_Price_5000_OnTier2.expected.txt

@@ -0,0 +1,25 @@
+[
+  {
+    I3D: '13',
+    ReceiptI3D: '4408',
+    ReceiptKind: '4',
+    Receiver: 'FixedEmployee',
+    EmployeeI3D: '10',
+    ProvisionPercentage: null,
+    Source: 'All',
+    ActualEmployeeI3D: '10',
+    ActualProvision: '930,0000000',
+    SharePercentage: '100,0000000',
+    Description: null,
+    Value: 'Sales',
+    SourceMaterialGroups: 'null',
+    ActualPrice: '5000,0000000',
+    FilterEmployeeI3D: null,
+    ActualPriceSales: '5000,0000000',
+    ActualPriceEarnings: null,
+    ActualProvisionSales: '930,0000000',
+    ActualProvisionEarnings: null,
+    GroupID: null,
+    ActualProvisionPercentage: '18,6000000'
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/8.2_Price_1000_OnTier1.expected.txt

@@ -0,0 +1,25 @@
+[
+  {
+    I3D: '14',
+    ReceiptI3D: '4408',
+    ReceiptKind: '4',
+    Receiver: 'FixedEmployee',
+    EmployeeI3D: '10',
+    ProvisionPercentage: null,
+    Source: 'All',
+    ActualEmployeeI3D: '10',
+    ActualProvision: '150,0000000',
+    SharePercentage: '100,0000000',
+    Description: null,
+    Value: 'Sales',
+    SourceMaterialGroups: 'null',
+    ActualPrice: '1000,0000000',
+    FilterEmployeeI3D: null,
+    ActualPriceSales: '1000,0000000',
+    ActualPriceEarnings: null,
+    ActualProvisionSales: '150,0000000',
+    ActualProvisionEarnings: null,
+    GroupID: null,
+    ActualProvisionPercentage: '15,0000000'
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/8_Levels_Stefan.expected.txt

@@ -0,0 +1,26 @@
+[
+  {
+    I3D: '7',
+    EmployeeI3D: '10',
+    FromPrice: '1000,0000000',
+    ProvisionPercentage: '5,0000000',
+    OverwriteLowerLevels: 'False',
+    Bonus: '100,0000000'
+  },
+  {
+    I3D: '8',
+    EmployeeI3D: '10',
+    FromPrice: '5000,0000000',
+    ProvisionPercentage: '7,0000000',
+    OverwriteLowerLevels: 'False',
+    Bonus: '500,0000000'
+  },
+  {
+    I3D: '9',
+    EmployeeI3D: '10',
+    FromPrice: '10000,0000000',
+    ProvisionPercentage: '2,0000000',
+    OverwriteLowerLevels: 'False',
+    Bonus: '1000,0000000'
+  }
+]

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/Tests/ReceiptProvisionLevels/ReceiptProvisionEmployeeLevelTests.cs

@@ -0,0 +1,247 @@
+using System;
+using System.Collections.Generic;
+using Centron.BusinessLogic;
+using Centron.BusinessLogic.Sales.Receipts.DataAndResults;
+using Centron.BusinessLogic.WebServices.Sales.Receipts;
+using Centron.Core.Extensions;
+using Centron.Data.WebServices.Sales.Receipts.Invoices;
+using Centron.Interfaces;
+using Centron.Interfaces.Administration.Environment;
+using Centron.Interfaces.BL;
+using Centron.Interfaces.Sales.Receipts;
+using Centron.Tests.EndToEnd.Infrastructure;
+using CentronSoftware.Centron.WebServices.Entities.Sales.Receipts;
+using Xunit.Abstractions;
+
+namespace Centron.Tests.EndToEnd.Tests.ReceiptProvisionTiers;
+
+public class ReceiptProvisionEmployeeLevelTests : EndToEndTest
+{
+    public ReceiptProvisionEmployeeLevelTests(ITestOutputHelper testOutputHelper)
+        : base(testOutputHelper)
+    {
+    }
+
+    private const int EmployeeI3D = 10;
+    private const int Invoice1I3D = 4408;
+    private const int Invoice2I3D = 5414;
+
+    public override void Execute()
+    {
+        this.PrepareDatabase();
+        
+        this.SaveLevels(step: 1);
+        this.LoadLevels(step: 2);
+
+        this.SingleInvoice(step: 3);
+        this.MultiInvoice(step: 4);
+        this.MoveProvisionToOtherEmployee(step: 5);
+        this.ChangeInvoiceDate(step: 6);
+
+        // Ticket 163976: tiers without FromPrice=0 used to yield [null] in GetLevels and NRE in PrepareLevelsOverwriteLowerLevels
+        this.LevelsWithoutZeroTier_BelowFirstTier(step: 7);
+
+        // Ticket 163972: bonus of just-reached tier was dropped when invoice sum exactly equaled tier FromPrice
+        this.InvoiceExactlyOnTierBoundary(step: 8);
+    }
+
+    private void PrepareDatabase()
+    {
+        // Fix broken tables
+        this.Sql("ALTER TABLE RechKopf DROP COLUMN LcmStatus");
+        this.Sql("ALTER TABLE GutKopf DROP COLUMN LcmStatus");
+
+        // Create a dummy provision-schema to enable provision-schemas instead of old ones
+        this.WithSession(s => s.GetBL<ReceiptProvisionSchemaWebServiceBL>().SaveProvisionSchema(new ReceiptProvisionSchemaDTO
+        {
+            Name = "Dummy",
+        }, this.GetLoggedInUser()));
+        
+        // Prepare some invoices for later
+        this.Sql($"DELETE FROM RechPos WHERE RechKopfI3D = {Invoice1I3D} AND ISNULL(ArtikelI3D, 0) <> 117");
+    }
+
+    private void SaveLevels(int step)
+    {
+        using var session = new BLSession();
+
+        var tiers = new List<ReceiptProvisionEmployeeLevelDTO>
+        {
+            new() { FromPrice = 0, ProvisionPercentage = 2, OverwriteLowerLevels = false, Bonus = null },
+            new() { FromPrice = 500, ProvisionPercentage = 3, OverwriteLowerLevels = true, Bonus = 100 },
+            new() { FromPrice = 1000, ProvisionPercentage = 4, OverwriteLowerLevels = false, Bonus = 200 },
+            new() { FromPrice = 2000, ProvisionPercentage = 5, OverwriteLowerLevels = false, Bonus = 300 },
+        };
+
+        session.GetBL<ReceiptProvisionEmployeeLevelWebServiceBL>().SaveEmployeeLevels(EmployeeI3D, tiers);
+        this.Verifier.VerifyTable($"{step}_Levels_Table", "ReceiptProvisionEmployeeLevels");
+    }
+
+    private void LoadLevels(int step)
+    {
+        using var session = new BLSession();
+
+        var tiers = session.GetBL<ReceiptProvisionEmployeeLevelWebServiceBL>().GetLevels(new() { EmployeeI3Ds = new List<int> { EmployeeI3D } });
+        this.Verifier.Verify($"{step}_Levels", tiers);
+    }
+
+    private void SingleInvoice(int step)
+    {
+        this.UpdateInvoice(Invoice1I3D, 400);
+        this.Verifier.VerifyTable($"{step}_Price_400", "ReceiptProvisionItems");
+        
+        this.UpdateInvoice(Invoice1I3D, 800);
+        this.Verifier.VerifyTable($"{step}_Price_800", "ReceiptProvisionItems");
+        
+        this.UpdateInvoice(Invoice1I3D, 3000);
+        this.Verifier.VerifyTable($"{step}_Price_3000", "ReceiptProvisionItems");
+    }
+
+    private void MultiInvoice(int step)
+    {
+        // With the of Invoice-2 200 € we reach the 500 € level
+        // That level overwrites the lower tiers, so we should should also get 3 % for the 400 € invoice
+        this.UpdateInvoice(Invoice1I3D, 400);
+        this.UpdateInvoice(Invoice2I3D, 200); 
+        this.Verifier.VerifyTable($"{step}.1_Price_600", "ReceiptProvisionItems");
+
+        // Now reduce it back down to 450 €, should go back to 2 % and no bonus
+        this.UpdateInvoice(Invoice2I3D, 50);
+        this.Verifier.VerifyTable($"{step}.2_Price_450", "ReceiptProvisionItems");
+    }
+
+    private void MoveProvisionToOtherEmployee(int step)
+    {
+        // Cleanup first
+        this.RemoveProvision(Invoice1I3D);
+        this.RemoveProvision(Invoice2I3D);
+        this.Verifier.VerifyTable($"{step}.1_Before", "ReceiptProvisionItems");
+        
+        // Lets start with 1000 € for the first employee
+        this.UpdateInvoice(Invoice1I3D, 1000);
+        this.Verifier.VerifyTable($"{step}.2_OldEmployee", "ReceiptProvisionItems");
+        
+        // Now we move the provision to another employee
+        this.UpdateInvoiceAndChangeEmployee(Invoice1I3D, 1000, alternativeEmployeeI3D: 20);
+        this.Verifier.VerifyTable($"{step}.3_NewEmployee", "ReceiptProvisionItems");
+    }
+
+    private void ChangeInvoiceDate(int step)
+    {
+        // Prepare a test case, both invoices together in one month go over 500 €
+        this.UpdateInvoice(Invoice1I3D, 400);
+        this.UpdateInvoice(Invoice2I3D, 200);
+        
+        // Now we change the date of the first invoice to a new month
+        this.UpdateInvoiceAndChangeDate(Invoice1I3D, new DateTime(2022, 1, 1));
+        
+        // The provision should be recalculated for both invoices
+        this.Verifier.VerifyTable($"{step}.1_NewMonth", "ReceiptProvisionItems");
+    }
+
+    private void LevelsWithoutZeroTier_BelowFirstTier(int step)
+    {
+        using var session = new BLSession();
+
+        var tiers = new List<ReceiptProvisionEmployeeLevelDTO>
+        {
+            new() { FromPrice = 500, ProvisionPercentage = 3, OverwriteLowerLevels = false, Bonus = null },
+            new() { FromPrice = 1000, ProvisionPercentage = 4, OverwriteLowerLevels = false, Bonus = null },
+        };
+
+        session.GetBL<ReceiptProvisionEmployeeLevelWebServiceBL>().SaveEmployeeLevels(EmployeeI3D, tiers);
+        this.Verifier.VerifyTable($"{step}_Levels_Table_NoZero", "ReceiptProvisionEmployeeLevels", $"EmployeeI3D = {EmployeeI3D}");
+
+        this.UpdateInvoice(Invoice1I3D, 400);
+        this.Verifier.VerifyTable($"{step}_Price_400_BelowFirstTier", "ReceiptProvisionItems", $"ReceiptI3D = {Invoice1I3D}");
+    }
+
+    private void InvoiceExactlyOnTierBoundary(int step)
+    {
+        // Stefan's repro from ticket 163972 (TestDB centronwes, RE 42321): tiers 1000/5000/10000 € with bonuses 100/500/1000 €.
+        // Invoice exactly on a tier threshold (sum == FromPrice) used to drop that tier's bonus because of strict < check.
+        using var session = new BLSession();
+
+        var tiers = new List<ReceiptProvisionEmployeeLevelDTO>
+        {
+            new() { FromPrice = 1000, ProvisionPercentage = 5, OverwriteLowerLevels = false, Bonus = 100 },
+            new() { FromPrice = 5000, ProvisionPercentage = 7, OverwriteLowerLevels = false, Bonus = 500 },
+            new() { FromPrice = 10000, ProvisionPercentage = 2, OverwriteLowerLevels = false, Bonus = 1000 },
+        };
+
+        session.GetBL<ReceiptProvisionEmployeeLevelWebServiceBL>().SaveEmployeeLevels(EmployeeI3D, tiers);
+        this.Verifier.VerifyTable($"{step}_Levels_Stefan", "ReceiptProvisionEmployeeLevels", $"EmployeeI3D = {EmployeeI3D}");
+
+        // Invoice exactly on tier 2 boundary (5000): expected = 5%*1000 + 100 + 7%*4000 + 500 = 930
+        this.UpdateInvoice(Invoice1I3D, 5000);
+        this.Verifier.VerifyTable($"{step}.1_Price_5000_OnTier2", "ReceiptProvisionItems", $"ReceiptI3D = {Invoice1I3D}");
+
+        // Invoice exactly on tier 1 boundary (1000): expected = 5%*1000 + 100 = 150 (count==1 short-circuit case)
+        this.UpdateInvoice(Invoice1I3D, 1000);
+        this.Verifier.VerifyTable($"{step}.2_Price_1000_OnTier1", "ReceiptProvisionItems", $"ReceiptI3D = {Invoice1I3D}");
+    }
+
+    private void RemoveProvision(int invoiceI3D)
+    {
+        this.UpdateInvoice(invoiceI3D, 0, invoice =>
+        {
+            invoice.Provision = [];
+        });
+    }
+    private void UpdateInvoiceAndChangeDate(int invoiceI3D, DateTime date)
+    {
+        this.UpdateInvoice(invoiceI3D, 0, invoice =>
+        {
+            invoice.Date = date;
+        });
+    }
+    private void UpdateInvoiceAndChangeEmployee(int invoiceI3D, decimal price, int alternativeEmployeeI3D)
+    {
+        this.UpdateInvoice(invoiceI3D, price, invoice =>
+        {
+            invoice.Provision[0].EmployeeI3D = alternativeEmployeeI3D;
+        });
+    }
+    private void UpdateInvoice(int invoiceI3D, decimal price, Action<ReceiptInvoiceDTO> changeInvoice = null)
+    {
+        var invoice = (ReceiptInvoiceDTO)this.WithSession(s => s.GetBL<ReceiptWebServiceBL>().CreateNewVersion(
+            CentronObjectKindNumeric.InvoiceClass,
+            invoiceI3D,
+            version: null,
+            newContactPersonI3D: null,
+            this.GetLoggedInUser().User,
+            new CreateNewVersionData
+            {
+                IgnoreCallbacks = true,
+            })).ThrowIfError().Receipt;
+        
+        invoice.Provision =
+        [
+            new ReceiptProvision
+            {
+                Receiver = ReceiptProvisionReceiver.FixedEmployee,
+                EmployeeI3D = EmployeeI3D,
+                ProvisionPercentage = null,
+                SharePercentage = 100,
+                Source = ReceiptProvisionSource.All,
+                Value = ReceiptProvisionValue.Sales,
+            }
+        ];
+        
+        invoice.Items[0].BasePrice = price;
+        invoice.Items[0].QuantityComplete = 1;
+        
+        changeInvoice?.Invoke(invoice);
+
+        var savedInvoice = (ReceiptInvoiceDTO)this.WithSession(s => s.GetBL<ReceiptWebServiceBL>().SaveReceipt(
+            invoice,
+            this.GetLoggedInUser().User,
+            new SaveReceiptData
+            {
+                IgnoreCallbacks = true,
+            },
+            autoLockIfNewReceipt: false,
+            CreatedThroughApplication.WebServices,
+            receiptTemplateFolderI3D: null)).ThrowIfError().Receipt;
+    }
+}