Migrate unit tests from xUnit to TUnit

.github/workflows/build.yml

@@ -43,7 +43,7 @@ jobs:
     - name: 🛠️ Build
       run: dotnet build -c Release src/Refitter.sln -p:UseSourceLink=true -p:PackageVersion="${{ env.VERSION }}" -p:Version="${{ env.VERSION }}"
     - name: 🧪 Test
-      run: dotnet test src/Refitter.sln -c Release
+      run: dotnet test --solution src/Refitter.sln -c Release
     - name: 🗳️ Upload
       uses: actions/upload-artifact@v5
       with:

.github/workflows/codecov.yml

@@ -27,22 +27,22 @@ jobs:
   build:
     name: 👌 Verify build
     runs-on: windows-latest
-    
+
     steps:
-    
+
     - name: 🛒 Checkout repository
-      uses: actions/checkout@v6   
+      uses: actions/checkout@v6
 
     - uses: actions/setup-dotnet@v5
       with:
         dotnet-version: |
           8.0.x
           9.0.x
           10.0.x
-    
+
     - name: 🧪 Test
-      run: dotnet test src/Refitter.Tests/Refitter.Tests.csproj -c Release --collect:"XPlat Code Coverage" -p:UseSourceLink=true -p:PackageVersion="${{ env.VERSION }}"
-    
+      run: dotnet test --project src/Refitter.Tests/Refitter.Tests.csproj -c Release --coverage --coverage-output coverage.cobertura.xml --coverage-output-format xml
+
     - name: 🗳️ Upload
       uses: actions/upload-artifact@v5
       with:

CONTRIBUTING.md

@@ -73,31 +73,38 @@ Feature requests are welcome! Please follow the feature request template in `.gi
   - Verify that the generated code builds successfully
 - Test coverage should be comprehensive, covering both normal operation and edge cases.
 - All tests must pass before submitting a pull request.
+- **Testing Framework**: The project uses [TUnit](https://github.com/thomhurst/TUnit) instead of xUnit for unit testing, which provides 3x faster test execution.
 
 Example test pattern:
 
 ```csharp
+using FluentAssertions;
+using Refitter.Core;
+using Refitter.Tests.Build;
+using Refitter.Tests.TestUtilities;
+using TUnit.Core;
+
 public class MyFeatureTests
 {
     private const string OpenApiSpec = @"
     // Your OpenAPI specification here
     ";
 
-    [Fact]
+    [Test]
     public async Task Can_Generate_Code()
     {
         string generatedCode = await GenerateCode();
         generatedCode.Should().NotBeNullOrWhiteSpace();
     }
 
-    [Fact]
+    [Test]
     public async Task Generated_Code_Contains_Expected_Pattern()
     {
         string generatedCode = await GenerateCode();
         generatedCode.Should().Contain("ExpectedPattern");
     }
 
-    [Fact]
+    [Test]
     public async Task Can_Build_Generated_Code()
     {
         string generatedCode = await GenerateCode();

README.md

@@ -1259,6 +1259,16 @@ Please head to the [Apizr documentation](https://www.apizr.net) to get more.
 
 .NET 8.0 or .NET 9.0
 
+## Testing
+
+Refitter uses [TUnit](https://github.com/thomhurst/TUnit) as its testing framework instead of xUnit. TUnit was chosen for its superior performance, providing 3x faster test execution compared to xUnit. This significantly improves the developer experience when running the test suite locally and in CI/CD pipelines.
+
+To run the tests:
+
+```bash
+dotnet test --solution src/Refitter.sln -c Release
+```
+
 ## Contributing
 
 Please read our [contribution guidelines](CONTRIBUTING.md) if you'd like to contribute to the project.

docs/README.md

@@ -34,4 +34,8 @@ When contributing to the documentation:
 2. Include code examples where appropriate
 3. Test your changes locally before submitting
 4. Ensure all links are valid and working
-5. Update the table of contents if adding new articles
+5. Update the table of contents if adding new articles
+
+## Testing Framework
+
+Refitter uses [TUnit](https://github.com/thomhurst/TUnit) for unit testing instead of xUnit. TUnit provides significantly faster test execution (3x faster), which improves both local development and CI/CD pipeline performance. When writing tests for new features or bug fixes, use TUnit's `[Test]` attribute instead of xUnit's `[Fact]` or `[Theory]`.

global.json

@@ -0,0 +1,10 @@
+{
+    "sdk": {
+        "version": "10.0.0",
+        "rollForward": "latestFeature",
+        "testingPlatform": true
+    },
+    "test": {
+        "runner": "Microsoft.Testing.Platform"
+    }
+}

src/Directory.Build.props

@@ -4,6 +4,8 @@
     <LangVersion>preview</LangVersion>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
+    <UseTestingPlatform>true</UseTestingPlatform>
+    <TestingPlatformDotnetTestSupport>true</TestingPlatformDotnetTestSupport>
   </PropertyGroup>
 
   <PropertyGroup Label="Nuget">
@@ -37,4 +39,4 @@
     <EnableNETAnalyzers>true</EnableNETAnalyzers>
   </PropertyGroup>
 
-</Project>
+</Project>

src/Refitter.SourceGenerator.Tests/CustomOutputFolderGeneratorTests.cs

@@ -1,17 +1,17 @@
 using FluentAssertions;
 using Refit;
 using Refitter.Tests.CustomGenerated;
-using Xunit;
+using TUnit.Core;
 
 namespace Refitter.SourceGenerators.Tests;
 
 public class CustomOutputFolderGeneratorTests
 {
-    [Fact]
+    [Test]
     public void Can_Create_File_In_Custom_Path() =>
         File.Exists("../../../CustomGenerated/CustomGenerated.cs").Should().BeTrue();
 
-    [Fact]
+    [Test]
     public void Can_Resolve_Refit_Interface() =>
         RestService.For<IApiInCustomGeneratedFolder>("https://petstore3.swagger.io/api/v3")
             .Should()

src/Refitter.SourceGenerator.Tests/MultipleInterfaceByTagGeneratorTests.cs

@@ -1,26 +1,26 @@
 using FluentAssertions;
 using Refit;
 using Refitter.Tests.AdditionalFiles.ByTag;
-using Xunit;
+using TUnit.Core;
 
 namespace Refitter.SourceGenerators.Tests;
 
 public class MultipleInterfaceByTagGeneratorTests
 {
-    [Theory]
-    [InlineData(typeof(IPetApi))]
-    [InlineData(typeof(IUserApi))]
-    [InlineData(typeof(IStoreApi))]
+    [Test]
+    [Arguments(typeof(IPetApi))]
+    [Arguments(typeof(IUserApi))]
+    [Arguments(typeof(IStoreApi))]
     public void Should_Generate_Interface(Type type) =>
         type
             .Namespace
             .Should()
             .Be("Refitter.Tests.AdditionalFiles.ByTag");
 
-    [Theory]
-    [InlineData(typeof(IPetApi))]
-    [InlineData(typeof(IUserApi))]
-    [InlineData(typeof(IStoreApi))]
+    [Test]
+    [Arguments(typeof(IPetApi))]
+    [Arguments(typeof(IUserApi))]
+    [Arguments(typeof(IStoreApi))]
     public void Can_Resolve_Refit_Interface(Type type) =>
         RestService.For(type, "https://petstore3.swagger.io/api/v3")
             .Should()

src/Refitter.SourceGenerator.Tests/MultipleInterfaceGeneratorTests.cs

@@ -1,58 +1,58 @@
 using FluentAssertions;
 using Refit;
 using Refitter.Tests.AdditionalFiles.ByEndpoint;
-using Xunit;
+using TUnit.Core;
 
 namespace Refitter.SourceGenerators.Tests;
 
 public class MultipleInterfaceGeneratorTests
 {
-    [Theory]
-    [InlineData(typeof(IAddPetEndpoint))]
-    [InlineData(typeof(IUpdatePetEndpoint))]
-    [InlineData(typeof(IDeletePetEndpoint))]
-    [InlineData(typeof(ICreateUserEndpoint))]
-    [InlineData(typeof(IUpdateUserEndpoint))]
-    [InlineData(typeof(IDeleteUserEndpoint))]
-    [InlineData(typeof(ILoginUserEndpoint))]
-    [InlineData(typeof(ILogoutUserEndpoint))]
-    [InlineData(typeof(IPlaceOrderEndpoint))]
-    [InlineData(typeof(IGetOrderByIdEndpoint))]
-    [InlineData(typeof(IDeleteOrderEndpoint))]
-    [InlineData(typeof(IGetInventoryEndpoint))]
-    [InlineData(typeof(IGetPetByIdEndpoint))]
-    [InlineData(typeof(IUploadFileEndpoint))]
-    [InlineData(typeof(IFindPetsByStatusEndpoint))]
-    [InlineData(typeof(IFindPetsByTagsEndpoint))]
-    [InlineData(typeof(IGetUserByNameEndpoint))]
-    [InlineData(typeof(IUpdatePetWithFormEndpoint))]
-    [InlineData(typeof(ICreateUsersWithListInputEndpoint))]
+    [Test]
+    [Arguments(typeof(IAddPetEndpoint))]
+    [Arguments(typeof(IUpdatePetEndpoint))]
+    [Arguments(typeof(IDeletePetEndpoint))]
+    [Arguments(typeof(ICreateUserEndpoint))]
+    [Arguments(typeof(IUpdateUserEndpoint))]
+    [Arguments(typeof(IDeleteUserEndpoint))]
+    [Arguments(typeof(ILoginUserEndpoint))]
+    [Arguments(typeof(ILogoutUserEndpoint))]
+    [Arguments(typeof(IPlaceOrderEndpoint))]
+    [Arguments(typeof(IGetOrderByIdEndpoint))]
+    [Arguments(typeof(IDeleteOrderEndpoint))]
+    [Arguments(typeof(IGetInventoryEndpoint))]
+    [Arguments(typeof(IGetPetByIdEndpoint))]
+    [Arguments(typeof(IUploadFileEndpoint))]
+    [Arguments(typeof(IFindPetsByStatusEndpoint))]
+    [Arguments(typeof(IFindPetsByTagsEndpoint))]
+    [Arguments(typeof(IGetUserByNameEndpoint))]
+    [Arguments(typeof(IUpdatePetWithFormEndpoint))]
+    [Arguments(typeof(ICreateUsersWithListInputEndpoint))]
     public void Should_Generate_Interface(Type type) =>
         type
             .Namespace
             .Should()
             .Be("Refitter.Tests.AdditionalFiles.ByEndpoint");
 
-    [Theory]
-    [InlineData(typeof(IAddPetEndpoint))]
-    [InlineData(typeof(IUpdatePetEndpoint))]
-    [InlineData(typeof(IDeletePetEndpoint))]
-    [InlineData(typeof(ICreateUserEndpoint))]
-    [InlineData(typeof(IUpdateUserEndpoint))]
-    [InlineData(typeof(IDeleteUserEndpoint))]
-    [InlineData(typeof(ILoginUserEndpoint))]
-    [InlineData(typeof(ILogoutUserEndpoint))]
-    [InlineData(typeof(IPlaceOrderEndpoint))]
-    [InlineData(typeof(IGetOrderByIdEndpoint))]
-    [InlineData(typeof(IDeleteOrderEndpoint))]
-    [InlineData(typeof(IGetInventoryEndpoint))]
-    [InlineData(typeof(IGetPetByIdEndpoint))]
-    [InlineData(typeof(IUploadFileEndpoint))]
-    [InlineData(typeof(IFindPetsByStatusEndpoint))]
-    [InlineData(typeof(IFindPetsByTagsEndpoint))]
-    [InlineData(typeof(IGetUserByNameEndpoint))]
-    [InlineData(typeof(IUpdatePetWithFormEndpoint))]
-    [InlineData(typeof(ICreateUsersWithListInputEndpoint))]
+    [Test]
+    [Arguments(typeof(IAddPetEndpoint))]
+    [Arguments(typeof(IUpdatePetEndpoint))]
+    [Arguments(typeof(IDeletePetEndpoint))]
+    [Arguments(typeof(ICreateUserEndpoint))]
+    [Arguments(typeof(IUpdateUserEndpoint))]
+    [Arguments(typeof(IDeleteUserEndpoint))]
+    [Arguments(typeof(ILoginUserEndpoint))]
+    [Arguments(typeof(ILogoutUserEndpoint))]
+    [Arguments(typeof(IPlaceOrderEndpoint))]
+    [Arguments(typeof(IGetOrderByIdEndpoint))]
+    [Arguments(typeof(IDeleteOrderEndpoint))]
+    [Arguments(typeof(IGetInventoryEndpoint))]
+    [Arguments(typeof(IGetPetByIdEndpoint))]
+    [Arguments(typeof(IUploadFileEndpoint))]
+    [Arguments(typeof(IFindPetsByStatusEndpoint))]
+    [Arguments(typeof(IFindPetsByTagsEndpoint))]
+    [Arguments(typeof(IGetUserByNameEndpoint))]
+    [Arguments(typeof(IUpdatePetWithFormEndpoint))]
+    [Arguments(typeof(ICreateUsersWithListInputEndpoint))]
     public void Can_Resolve_Refit_Interface(Type type) =>
         RestService.For(type, "https://petstore3.swagger.io/api/v3")
             .Should()

src/Refitter.SourceGenerator.Tests/OptionalParametersGeneratorTest.cs

@@ -1,20 +1,20 @@
 using FluentAssertions;
 using Refit;
 using Refitter.Tests.AdditionalFiles.OptionalParameters;
-using Xunit;
+using TUnit.Core;
 
 namespace Refitter.SourceGenerators.Tests;
 
 public class OperationalParametersGeneratorTest
 {
-    [Fact]
+    [Test]
     public void Should_Type_Exist() =>
         typeof(ISwaggerPetstoreWithOptionalParameters)
             .Namespace
             .Should()
             .Be("Refitter.Tests.AdditionalFiles.OptionalParameters");
 
-    [Fact]
+    [Test]
     public void Can_Resolve_Refit_Interface() =>
         RestService.For<ISwaggerPetstoreWithOptionalParameters>("https://petstore3.swagger.io/api/v3")
             .Should()

src/Refitter.SourceGenerator.Tests/Refitter.SourceGenerator.Tests.csproj

@@ -3,19 +3,18 @@
     <PropertyGroup>
         <TargetFramework>net8.0</TargetFramework>
         <IsPackable>false</IsPackable>
+        <OutputType>Exe</OutputType>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <GenerateProgramFile>false</GenerateProgramFile>
         <RootNamespace>Refitter.SourceGenerators.Tests</RootNamespace>
     </PropertyGroup>
 
     <ItemGroup>
         <PackageReference Include="Microsoft.Extensions.Http.Resilience" Version="10.0.0" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
         <PackageReference Include="FluentAssertions" Version="7.2.0" />
         <PackageReference Include="System.Text.Json" Version="10.0.0" />
-        <PackageReference Include="xunit" Version="2.9.3" />
-        <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
-            <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-            <PrivateAssets>all</PrivateAssets>
-        </PackageReference>
+        <PackageReference Include="TUnit" Version="1.3.25" />
         <PackageReference Include="coverlet.collector" Version="6.0.4">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>
@@ -42,9 +41,9 @@
     </ItemGroup>
 
     <ItemGroup>
-      <ProjectReference 
-        Include="..\Refitter.SourceGenerator\Refitter.SourceGenerator.csproj" 
-        OutputItemType="Analyzer" 
+      <ProjectReference
+        Include="..\Refitter.SourceGenerator\Refitter.SourceGenerator.csproj"
+        OutputItemType="Analyzer"
         ReferenceOutputAssembly="false" />
     </ItemGroup>
 

src/Refitter.SourceGenerator.Tests/SingleInterfaceGeneratorTest.cs

@@ -1,20 +1,20 @@
 using FluentAssertions;
 using Refit;
 using Refitter.Tests.AdditionalFiles.SingeInterface;
-using Xunit;
+using TUnit.Core;
 
 namespace Refitter.SourceGenerators.Tests;
 
 public class SingleInterfaceGeneratorTest
 {
-    [Fact]
+    [Test]
     public void Should_Type_Exist() =>
         typeof(ISwaggerPetstoreInterface)
             .Namespace
             .Should()
             .Be("Refitter.Tests.AdditionalFiles.SingeInterface");
 
-    [Fact]
+    [Test]
     public void Can_Resolve_Refit_Interface() =>
         RestService.For<ISwaggerPetstoreInterface>("https://petstore3.swagger.io/api/v3")
             .Should()