replace Mono.Cecil with Roslyn for VersionWriterTests

Author: arturcic

src/Directory.Packages.props

@@ -9,6 +9,7 @@
     <PackageVersion Include="JetBrains.Annotations" Version="2022.3.1" />
     <PackageVersion Include="Microsoft.Build.Utilities.Core" Version="17.5.0" />
     <PackageVersion Include="Microsoft.Build" Version="17.5.0" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.5.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.PublicApiAnalyzers" Version="3.3.4" />
     <PackageVersion Include="Microsoft.Extensions.Configuration.CommandLine" Version="7.0.0" />
     <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
@@ -18,7 +19,6 @@
     <PackageVersion Include="Microsoft.Extensions.Options" Version="7.0.1" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
     <PackageVersion Include="Microsoft.Win32.Registry" Version="6.0.0-preview.5.21301.5" />
-    <PackageVersion Include="Mono.Cecil" Version="0.11.5" />
     <PackageVersion Include="Buildalyzer" Version="5.0.0" />
     <PackageVersion Include="coverlet.msbuild" Version="3.2.0" />
     <PackageVersion Include="MSBuild.ProjectCreation" Version="10.0.0" />

src/GitVersion.App.Tests/GitVersion.App.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <ItemGroup>
-        <PackageReference Include="Mono.Cecil" />
+        <PackageReference Include="Microsoft.CodeAnalysis.CSharp" />
     </ItemGroup>
     <ItemGroup>
         <ProjectReference Include="..\GitVersion.Core\GitVersion.Core.csproj" />

src/GitVersion.App.Tests/VersionWriterTests.cs

@@ -1,7 +1,8 @@
 using GitVersion.Core.Tests.Helpers;
 using GitVersion.Extensions;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
 using Microsoft.Extensions.DependencyInjection;
-using Mono.Cecil;
 
 namespace GitVersion.App.Tests;
 
@@ -46,17 +47,16 @@ public void WriteVersionShouldWriteFileVersionWithPrereleaseTag()
 
     private static Assembly GenerateAssembly(Version fileVersion, string prereleaseInfo)
     {
-        var definition = new AssemblyNameDefinition("test-asm", fileVersion);
-
-        var asmDef = AssemblyDefinition.CreateAssembly(definition, "test-asm", ModuleKind.Dll);
-        var constructor = typeof(AssemblyInformationalVersionAttribute).GetConstructor(new[] { typeof(string) });
-        var methodReference = asmDef.MainModule.ImportReference(constructor);
-        var customAttribute = new CustomAttribute(methodReference);
-        customAttribute.ConstructorArguments.Add(new CustomAttributeArgument(asmDef.MainModule.TypeSystem.String, fileVersion + prereleaseInfo));
-        asmDef.CustomAttributes.Add(customAttribute);
+        var attribute = typeof(AssemblyInformationalVersionAttribute);
+        var csharpCode = $@"[assembly: {attribute.FullName}(""{fileVersion + prereleaseInfo}"")]";
+        var compilation = CSharpCompilation.Create("test-asm")
+            .WithOptions(new(OutputKind.DynamicallyLinkedLibrary))
+            .AddReferences(MetadataReference.CreateFromFile(typeof(object).Assembly.Location))
+            .AddReferences(MetadataReference.CreateFromFile(attribute.Assembly.Location))
+            .AddSyntaxTrees(CSharpSyntaxTree.ParseText(csharpCode));
 
         using var memoryStream = new MemoryStream();
-        asmDef.Write(memoryStream);
+        compilation.Emit(memoryStream);
 
         return Assembly.Load(memoryStream.ToArray());
     }