Switched to snapshot testing for generated code.

Author: PawelGerr

.editorconfig

@@ -0,0 +1,9 @@
+# Verify settings
+[*.{received,verified}.{json,txt,xml,cs}]
+charset = utf-8
+end_of_line = lf
+indent_size = unset
+indent_style = unset
+insert_final_newline = false
+tab_width = unset
+trim_trailing_whitespace = false

.gitattributes

@@ -0,0 +1,4 @@
+*.verified.txt text eol=lf working-tree-encoding=UTF-8
+*.verified.xml text eol=lf working-tree-encoding=UTF-8
+*.verified.json text eol=lf working-tree-encoding=UTF-8
+*.verified.cs text eol=lf working-tree-encoding=UTF-8

.gitignore

@@ -7,3 +7,7 @@
 
 *\.sln\.DotSettings\.user
 *\.csproj\.user
+
+# Verify
+test/**/*.received.*
+test/**/*.received/

Directory.Packages.props

@@ -22,6 +22,7 @@
     <PackageVersion Include="NSubstitute.Analyzers.CSharp" Version="1.0.17" />
     <PackageVersion Include="Serilog.Extensions.Logging" Version="8.0.0" />
     <PackageVersion Include="Serilog.Sinks.Console" Version="6.0.0" />
+    <PackageVersion Include="Verify.Xunit" Version="28.3.2" />
     <PackageVersion Include="xunit" Version="2.9.2" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
   </ItemGroup>

Thinktecture.Runtime.Extensions.sln

@@ -22,6 +22,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "assets", "assets", "{21EB22
 		.github\workflows\codeql-analysis.yml = .github\workflows\codeql-analysis.yml
 		global.json = global.json
 		Directory.Packages.props = Directory.Packages.props
+		.gitattributes = .gitattributes
+		.editorconfig = .editorconfig
 	EndProjectSection
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "samples", "samples", "{E6F200ED-86D2-4D5C-9D5F-34592908B107}"

test/Directory.Build.props

@@ -13,6 +13,7 @@
         <NoWarn>$(NoWarn);CS1591;CA1707;NU1903;NETSDK1206;NU1904</NoWarn>
         <RootNamespace>Thinktecture.Runtime.Tests</RootNamespace>
         <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
+        <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
         <TargetFramework></TargetFramework>
         <TargetFrameworks>net7.0;net8.0;net9.0</TargetFrameworks>
     </PropertyGroup>
@@ -22,6 +23,7 @@
         <PackageReference Include="FluentAssertions"/>
         <PackageReference Include="NSubstitute"/>
         <PackageReference Include="NSubstitute.Analyzers.CSharp"/>
+        <PackageReference Include="Verify.Xunit" />
         <PackageReference Include="xunit"/>
         <PackageReference Include="xunit.runner.visualstudio" PrivateAssets="all"/>
     </ItemGroup>

test/Thinktecture.Runtime.Extensions.SourceGenerator.Tests/ModuleInit.cs

@@ -0,0 +1,13 @@
+using System.Runtime.CompilerServices;
+using DiffEngine;
+
+namespace Thinktecture.Runtime.Tests;
+
+internal class TestModuleInit
+{
+   [ModuleInitializer]
+   internal static void ModuleInit()
+   {
+      DiffRunner.Disabled = true;
+   }
+}

test/Thinktecture.Runtime.Extensions.SourceGenerator.Tests/SourceGeneratorTests/AdHocUnionSourceGeneratorTests.cs

@@ -1,3 +1,4 @@
+using System.Threading.Tasks;
 using Thinktecture.CodeAnalysis.SmartEnums;
 using Xunit.Abstractions;
 
@@ -11,7 +12,7 @@ public JsonSmartEnumSourceGeneratorTests(ITestOutputHelper output)
    }
 
    [Fact]
-   public void Should_generate_JsonConverter_and_Attribute_if_Attribute_is_missing()
+   public async Task Should_generate_JsonConverter_and_Attribute_if_Attribute_is_missing()
    {
       var source = """
 
@@ -32,22 +33,11 @@ public partial class TestEnum
                                                                 ".Json",
                                                                 typeof(IEnum<>).Assembly, typeof(Thinktecture.Text.Json.Serialization.ValueObjectJsonConverter<,,>).Assembly, typeof(System.Text.Json.JsonDocument).Assembly);
 
-      AssertOutput(output, """
-                           // <auto-generated />
-                           #nullable enable
-
-                           namespace Thinktecture.Tests;
-
-                           [global::System.Text.Json.Serialization.JsonConverterAttribute(typeof(global::Thinktecture.Text.Json.Serialization.ValueObjectJsonConverterFactory<global::Thinktecture.Tests.TestEnum, global::Thinktecture.ValidationError>))]
-                           partial class TestEnum
-                           {
-                           }
-
-                           """);
+      await VerifyAsync(output);
    }
 
    [Fact]
-   public void Should_generate_JsonConverter_for_enum_without_namespace()
+   public async Task Should_generate_JsonConverter_for_enum_without_namespace()
    {
       var source = """
 
@@ -66,20 +56,11 @@ public partial class TestEnum
                                                                 ".Json",
                                                                 typeof(IEnum<>).Assembly, typeof(Thinktecture.Text.Json.Serialization.ValueObjectJsonConverter<,,>).Assembly, typeof(System.Text.Json.JsonDocument).Assembly);
 
-      AssertOutput(output, """
-                           // <auto-generated />
-                           #nullable enable
-
-                           [global::System.Text.Json.Serialization.JsonConverterAttribute(typeof(global::Thinktecture.Text.Json.Serialization.ValueObjectJsonConverterFactory<global::TestEnum, global::Thinktecture.ValidationError>))]
-                           partial class TestEnum
-                           {
-                           }
-
-                           """);
+      await VerifyAsync(output);
    }
 
    [Fact]
-   public void Should_generate_JsonConverter_and_Attribute_for_struct_if_Attribute_is_missing()
+   public async Task Should_generate_JsonConverter_and_Attribute_for_struct_if_Attribute_is_missing()
    {
       var source = """
 
@@ -100,18 +81,7 @@ public partial struct TestEnum
                                                                 ".Json",
                                                                 typeof(IEnum<>).Assembly, typeof(Thinktecture.Text.Json.Serialization.ValueObjectJsonConverter<,,>).Assembly, typeof(System.Text.Json.JsonDocument).Assembly);
 
-      AssertOutput(output, """
-                           // <auto-generated />
-                           #nullable enable
-
-                           namespace Thinktecture.Tests;
-
-                           [global::System.Text.Json.Serialization.JsonConverterAttribute(typeof(global::Thinktecture.Text.Json.Serialization.ValueObjectJsonConverterFactory<global::Thinktecture.Tests.TestEnum, global::Thinktecture.ValidationError>))]
-                           partial struct TestEnum
-                           {
-                           }
-
-                           """);
+      await VerifyAsync(output);
    }
 
    [Fact]