Update test project dependencies and add project references

Updated `Microsoft.NET.Test.Sdk` to version 17.11.1 and `xunit` to version 2.9.3. Updated `xunit.runner.visualstudio` to version 2.8.2 with additional metadata for asset inclusion and private asset behavior.

Added new dependencies: `FluentAssertions` (7.0.0) and `Moq` (4.20.72).

Introduced project references to `DocumentOperator.Domain`, `DocumentOperator.Application`, and `DocumentOperator.Infrastructure` to the test project.

No changes were made to the `coverlet.collector` dependency or the `<Using Include="Xunit" />` directive.

DocumentOperator.API/ROADMAP.md

@@ -726,10 +726,12 @@ DocumentOperator.Tests/
 
 ---
 
-### ?? PHASE 2: Domain Layer (Minimal) - **IN PROGRESS**
+### ? PHASE 2: Domain Layer (Minimal) - **COMPLETED**
 
 **Ziel:** Nur was wirklich gebraucht wird!
 
+**Status:** ? **Alle Steps abgeschlossen!**
+
 ---
 
 #### ? Step 2.1: Domain Exceptions erstellen - **COMPLETED**
@@ -802,7 +804,7 @@ DocumentOperator.Tests/
 
 ---
 
-#### ?? Step 2.3: Value Objects erstellen - **NEXT**
+#### ? Step 2.3: Value Objects erstellen - **COMPLETED**
 
 **Aufgabe:** Typsichere, selbst-validierende Wert-Objekte
 
@@ -812,49 +814,58 @@ DocumentOperator.Tests/
 - ? Immutable (keine Änderungen nach Erstellung)
 - ? Wiederverwendbar (in Domain, Application, Infrastructure)
 
-**Was du erstellen wirst:**
+**Was du erstellt hast:**
 
-1. **Base64String.cs**
+1. **Base64String.cs** ?
    - Factory Method: `Create(string value)`
    - Validierung: Gültiges Base64-Format
    - Konvertierung: `ToByteArray()`, `FromByteArray(byte[])`
    - Wirft `DomainValidationException` bei Fehler
 
-2. **TenantId.cs**
+2. **TenantId.cs** ?
    - Factory Method: `Create(string value)`
    - Validierung: Nicht leer, Max 100 Zeichen
    - Normalisierung: `.ToLowerInvariant()`
    - Wirft `DomainValidationException` bei Fehler
 
-3. **PdfMetadata.cs**
+3. **PdfMetadata.cs** ?
    - Properties: PageCount, FileSizeBytes, PdfVersion, HasAttachments, AttachmentCount
    - Computed Property: `FileSizeMB`
    - Keine Validierung (nur Daten-Container)
 
 **Wo:** `Domain/Models/ValueObjects/`
 
-**Detaillierte Anleitung kommt in Step 2.3!**
+**Status:** ? **COMPLETED** (17.01.2025)
+- ? Base64String.cs erstellt (sealed, Factory Methods, Validierung, Equality)
+- ? TenantId.cs erstellt (sealed, Normalisierung, Validierung, Equality)
+- ? PdfMetadata.cs erstellt (sealed, Computed Property, ToString())
+- ? Build erfolgreich
+
+**?? Phase 2 (Domain Layer) komplett abgeschlossen!**
 
 ---
 
-### ? PHASE 3: Infrastructure Layer (Outside-In!)
+### ? PHASE 3: Infrastructure Layer (Outside-In!) - **NEXT**
 
 **Ziel:** DevExpress Services implementieren (wir sehen **echten** Code!)
 
 ---
 
-#### ? Step 3.1: IPdfProcessor Interface erstellen
+#### ? Step 3.1: IPdfProcessor Interface erstellen - **COMPLETED**
 
 **Aufgabe:** Abstraction für PDF-Operationen
 
-**Was du erstellen wirst:**
-- **Wo:** `Application/Common/Interfaces/IPdfProcessor.cs`
+**Was du erstellt hast:**
+- **Wo:** `Application/Common/Interfaces/IPdfProcessor.cs` ?
 - **Inhalt:**
   ```csharp
+  using DocumentOperator.Domain.Models.ValueObjects;
+
+  namespace DocumentOperator.Application.Common.Interfaces;
+
   public interface IPdfProcessor
   {
       Task<PdfMetadata> ValidateAsync(byte[] pdfBytes);
-      // Weitere Methoden später (YAGNI!)
   }
   ```
 
@@ -863,9 +874,15 @@ DocumentOperator.Tests/
 - Infrastructure implementiert
 - TDD: Test ? Interface ? Implementation
 
+**Status:** ? **COMPLETED** (17.01.2025)
+- ? Interface erstellt mit XML Comments
+- ? Using Statement korrekt
+- ? Namespace korrekt
+- ? Build erfolgreich
+
 ---
 
-#### ? Step 3.2: DevExpressPdfProcessor implementieren (mit TDD!)
+#### ?? Step 3.2: DevExpressPdfProcessor implementieren (mit TDD!) - **NEXT**
 
 **Aufgabe:** DevExpress Integration
 
@@ -1271,6 +1288,23 @@ public async Task POST_ValidatePdf_InvalidPdf_Returns400() { }
 ## ?? CURRENT STATUS
 
 ### ? Completed
+- **Phase 1:** Foundation & Clean Architecture Setup ?
+  - Dependencies ?
+  - Packages ?
+  - Folder Structure ?
+  - Configuration ?
+  - Serilog ?
+
+- **Phase 2:** Domain Layer (Minimal) ?
+  - ? Step 2.1 - Domain Exceptions (4 Exceptions erstellt)
+  - ? Step 2.2 - Enums (DocumentOperationType, ProcessingStatus)
+  - ? Step 2.3 - Value Objects (Base64String, TenantId, PdfMetadata)
+
+### ?? In Progress
+- **Phase 3:** Infrastructure Layer (Outside-In!)
+  - **NEXT:** Step 3.1 - IPdfProcessor Interface erstellen
+
+### ? Pending
 - **Phase 1:** Foundation & Clean Architecture Setup
   - Dependencies ?
   - Packages ?

DocumentOperator.Application/Common/Interfaces/IPdfProcessor.cs

@@ -0,0 +1,16 @@
+using DocumentOperator.Domain.Models.ValueObjects;
+
+namespace DocumentOperator.Application.Common.Interfaces;
+
+public interface IPdfProcessor
+{
+    /// <summary>
+    /// Validates a PDF and extracts metadata.
+    /// </summary>
+    /// <param name="pdfBytes">PDF content as byte array</param>
+    /// <returns>PDF metadata (page count, size, version, attachments)</returns>
+    /// <exception cref="Domain.Common.Exceptions.PdfProcessingException">
+    /// Thrown when PDF is corrupted or cannot be processed
+    /// </exception>
+    Task<PdfMetadata> ValidateAsync(byte[] pdfBytes);
+}

DocumentOperator.Application/DocumentOperator.Application.csproj

@@ -17,7 +17,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <Folder Include="Common\Interfaces\" />
     <Folder Include="Common\Behaviors\" />
     <Folder Include="Common\DTOs\" />
     <Folder Include="Common\Mappings\" />

DocumentOperator.Domain/DocumentOperator.Domain.csproj

@@ -9,7 +9,6 @@
   <ItemGroup>
     <Folder Include="Common\Results\" />
     <Folder Include="Constants\" />
-    <Folder Include="Models\ValueObjects\" />
   </ItemGroup>
 
 </Project>

DocumentOperator.Domain/Models/ValueObjects/Base64String.cs

@@ -0,0 +1,59 @@
+namespace DocumentOperator.Domain.Models.ValueObjects;
+
+public sealed class Base64String
+{
+    public string Value { get; }
+
+    private Base64String(string value)
+    {
+        Value = value;
+    }
+
+    public static Base64String Create(string value)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+            throw new Common.Exceptions.DomainValidationException("Base64 string cannot be empty.");
+
+        // Validierung: Ist es gültiges Base64?
+        try
+        {
+            Convert.FromBase64String(value);
+        }
+        catch (FormatException)
+        {
+            throw new Common.Exceptions.DomainValidationException("Invalid Base64 format.");
+        }
+
+        return new Base64String(value);
+    }
+
+    public static Base64String FromByteArray(byte[] bytes)
+    {
+        if (bytes == null || bytes.Length == 0)
+            throw new Common.Exceptions.DomainValidationException("Byte array cannot be null or empty.");
+
+        var base64 = Convert.ToBase64String(bytes);
+        return new Base64String(base64);
+    }
+
+    public byte[] ToByteArray()
+    {
+        return Convert.FromBase64String(Value);
+    }
+
+    public override string ToString() => Value;
+
+    // Equality (wichtig für Value Objects!)
+    public override bool Equals(object? obj)
+    {
+        if (obj is not Base64String other)
+            return false;
+
+        return Value == other.Value;
+    }
+
+    public override int GetHashCode()
+    {
+        return Value.GetHashCode();
+    }
+}

DocumentOperator.Domain/Models/ValueObjects/PdfMetadata.cs

@@ -0,0 +1,32 @@
+namespace DocumentOperator.Domain.Models.ValueObjects;
+
+public sealed class PdfMetadata
+{
+    public int PageCount { get; }
+    public long FileSizeBytes { get; }
+    public string PdfVersion { get; }
+    public bool HasAttachments { get; }
+    public int AttachmentCount { get; }
+
+    // Computed Property (berechnet aus FileSizeBytes)
+    public double FileSizeMB => FileSizeBytes / 1024.0 / 1024.0;
+
+    public PdfMetadata(
+        int pageCount,
+        long fileSizeBytes,
+        string pdfVersion,
+        bool hasAttachments,
+        int attachmentCount)
+    {
+        PageCount = pageCount;
+        FileSizeBytes = fileSizeBytes;
+        PdfVersion = pdfVersion;
+        HasAttachments = hasAttachments;
+        AttachmentCount = attachmentCount;
+    }
+
+    public override string ToString()
+    {
+        return $"PDF: {PageCount} pages, {FileSizeMB:F2} MB, Version {PdfVersion}, Attachments: {AttachmentCount}";
+    }
+}

DocumentOperator.Domain/Models/ValueObjects/TenantId.cs

@@ -0,0 +1,41 @@
+namespace DocumentOperator.Domain.Models.ValueObjects;
+
+public sealed class TenantId
+{
+    public string Value { get; }
+
+    private TenantId(string value)
+    {
+        Value = value;
+    }
+
+    public static TenantId Create(string value)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+            throw new Common.Exceptions.DomainValidationException("TenantId cannot be empty.");
+
+        if (value.Length > 100)
+            throw new Common.Exceptions.DomainValidationException("TenantId cannot exceed 100 characters.");
+
+        // Normalisierung: Lowercase
+        var normalized = value.Trim().ToLowerInvariant();
+
+        return new TenantId(normalized);
+    }
+
+    public override string ToString() => Value;
+
+    // Equality
+    public override bool Equals(object? obj)
+    {
+        if (obj is not TenantId other)
+            return false;
+
+        return Value == other.Value;
+    }
+
+    public override int GetHashCode()
+    {
+        return Value.GetHashCode();
+    }
+}

DocumentOperator.Tests/DocumentOperator.Tests.csproj

@@ -0,0 +1,34 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.0" />
+    <PackageReference Include="FluentAssertions" Version="7.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
+    <PackageReference Include="Moq" Version="4.20.72" />
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="Xunit" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\DocumentOperator.Domain\DocumentOperator.Domain.csproj" />
+    <ProjectReference Include="..\DocumentOperator.Application\DocumentOperator.Application.csproj" />
+    <ProjectReference Include="..\DocumentOperator.Infrastructure\DocumentOperator.Infrastructure.csproj" />
+  </ItemGroup>
+
+</Project>

DocumentOperator.Tests/UnitTest1.cs

@@ -0,0 +1,11 @@
+namespace DocumentOperator.Tests
+{
+    public class UnitTest1
+    {
+        [Fact]
+        public void Test1()
+        {
+
+        }
+    }
+}

DocumentOperator.sln

@@ -11,6 +11,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DocumentOperator.Infrastruc
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DocumentOperator.Domain", "DocumentOperator.Domain\DocumentOperator.Domain.csproj", "{B4C1C3ED-D3E8-4272-8704-2E73CEA6A0DD}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DocumentOperator.Tests", "DocumentOperator.Tests\DocumentOperator.Tests.csproj", "{32D2E997-3DA7-4061-8A50-DBB34BBC3E5A}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -33,6 +35,10 @@ Global
 		{B4C1C3ED-D3E8-4272-8704-2E73CEA6A0DD}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{B4C1C3ED-D3E8-4272-8704-2E73CEA6A0DD}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{B4C1C3ED-D3E8-4272-8704-2E73CEA6A0DD}.Release|Any CPU.Build.0 = Release|Any CPU
+		{32D2E997-3DA7-4061-8A50-DBB34BBC3E5A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{32D2E997-3DA7-4061-8A50-DBB34BBC3E5A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{32D2E997-3DA7-4061-8A50-DBB34BBC3E5A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{32D2E997-3DA7-4061-8A50-DBB34BBC3E5A}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE