RSCG – MSTest

AOP for MSTest

This is how you can use MSTest .

The code that you start with is

<!-- file: UnitTestProject1.csproj -->
<Project Sdk="Microsoft.NET.Sdk">

	<PropertyGroup>
		<TargetFramework>net8.0</TargetFramework>
		<ImplicitUsings>enable</ImplicitUsings>
		<Nullable>enable</Nullable>

		<OutputType>exe</OutputType>
		<PublishAot>true</PublishAot>
	</PropertyGroup>

	<ItemGroup>
		<!-- 
      Experimental MSTest Engine & source generator,
      close sourced,licensed the same as our extensions 
      with Microsoft Testing Platform Tools license.
    -->
		<PackageReference Include="MSTest.Engine" Version="1.0.0-alpha.24163.4" />
		<PackageReference Include="MSTest.SourceGeneration" Version="1.0.0-alpha.24163.4" />

		<PackageReference Include="Microsoft.CodeCoverage.MSBuild" Version="17.10.4" />
		<PackageReference Include="Microsoft.Testing.Extensions.CodeCoverage" Version="17.10.4" />

		<PackageReference Include="Microsoft.Testing.Extensions.TrxReport" Version="1.0.2" />
		<PackageReference Include="Microsoft.Testing.Platform.MSBuild" Version="1.0.2" />
		<PackageReference Include="MSTest.TestFramework" Version="3.2.2" />
		<PackageReference Include="MSTest.Analyzers" Version="3.2.2" />

	</ItemGroup>

	<ItemGroup>
		<ProjectReference Include="..\MyImportantClass\MyImportantClass.csproj" />
	</ItemGroup>

	<ItemGroup>
		<Using Include="Microsoft.VisualStudio.TestTools.UnitTesting" />
	</ItemGroup>

	<PropertyGroup>
		<EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
		<CompilerGeneratedFilesOutputPath>$(BaseIntermediateOutputPath)\GX</CompilerGeneratedFilesOutputPath>
	</PropertyGroup>

</Project>

The code that you will use is

// file: UnitTest1.cs
using MyImportantClass;

namespace DemoTest;

[TestClass]
public class UnitTest1
{
    [TestMethod]
    public void TestMethod1()
    {
        Assert.AreEqual(3,new Class1().Add(1,2));
    }

    [TestMethod]
    [DataRow(1,2)]
    [DataRow(100,-97)]
    public void TestMethod2(int left,int right)
    {
        Assert.AreEqual(3,new Class1().Add(left,right));
    }
}

The code that is generated is

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by Microsoft Testing Framework Generator.
// </auto-generated>
//------------------------------------------------------------------------------

namespace DemoTest
{
    using Threading = global::System.Threading;
    using ColGen = global::System.Collections.Generic;
    using CA = global::System.Diagnostics.CodeAnalysis;
    using Sys = global::System;
    using Msg = global::Microsoft.Testing.Platform.Extensions.Messages;
    using MSTF = global::Microsoft.Testing.Framework;

    [CA::ExcludeFromCodeCoverage]
    public static class DemoTest_UnitTest1
    {
        public static readonly MSTF::TestNode TestNode = new MSTF::TestNode
        {
            StableUid = "DemoTest.DemoTest.UnitTest1",
            DisplayName = "UnitTest1",
            Properties = new Msg::IProperty[1]
            {
                new Msg::TestFileLocationProperty(@"D:\gth\RSCG_Examples\v2\rscg_examples\MSTest\src\DemoTest\UnitTest1.cs",new(new(6,-1),new(22,-1))),
            },
            Tests = new MSTF::TestNode[]
            {
                new MSTF::InternalUnsafeActionTestNode
                {
                    StableUid = "DemoTest.DemoTest.UnitTest1.TestMethod1()",
                    DisplayName = "TestMethod1",
                    Properties = new Msg::IProperty[2]
                    {
                        new Msg::TestMethodIdentifierProperty(
                            "DemoTest,Version=1.0.0.0,Culture=neutral,PublicKeyToken=null",
                            "DemoTest",
                            "UnitTest1",
                            "TestMethod1",
                            Sys::Array.Empty<string>(),
                            "System.Void"),
                        new Msg::TestFileLocationProperty(@"D:\gth\RSCG_Examples\v2\rscg_examples\MSTest\src\DemoTest\UnitTest1.cs",new(new(9,-1),new(13,-1))),
                    },
                    Body = static testExecutionContext =>
                    {
                        var instance = new UnitTest1();
                        try
                        {
                            instance.TestMethod1();
                        }
                        catch (global::System.Exception ex)
                        {
                            testExecutionContext.ReportException(ex,null);
                        }
                    },
                },
                new MSTF::InternalUnsafeActionParameterizedTestNode<MSTF::InternalUnsafeTestArgumentsEntry<(int left,int right)>>
                {
                    StableUid = "DemoTest.DemoTest.UnitTest1.TestMethod2(int,int)",
                    DisplayName = "TestMethod2",
                    Properties = new Msg::IProperty[2]
                    {
                        new Msg::TestMethodIdentifierProperty(
                            "DemoTest,Version=1.0.0.0,Culture=neutral,PublicKeyToken=null",
                            "DemoTest",
                            "UnitTest1",
                            "TestMethod2",
                            new string[2]
                            {
                                "System.Int32",
                                "System.Int32",
                            },
                            "System.Void"),
                        new Msg::TestFileLocationProperty(@"D:\gth\RSCG_Examples\v2\rscg_examples\MSTest\src\DemoTest\UnitTest1.cs",new(new(15,-1),new(21,-1))),
                    },
                    GetArguments = static () => new MSTF::InternalUnsafeTestArgumentsEntry<(int left,int right)>[]
                    {
                        new MSTF::InternalUnsafeTestArgumentsEntry<(int left,int right)>((1,2),"left: 1,right: 2"),
                        new MSTF::InternalUnsafeTestArgumentsEntry<(int left,int right)>((100,-97),"left: 100,right: -97"),
                    },
                    Body = static (testExecutionContext,data) =>
                    {
                        var instance = new UnitTest1();
                        try
                        {
                            instance.TestMethod2(data.Arguments.left,data.Arguments.right);
                        }
                        catch (global::System.Exception ex)
                        {
                            testExecutionContext.ReportException(ex,null);
                        }
                    },
                },
            },
        };
    }
}

namespace Microsoft.Testing.Framework.SourceGeneration
{
    public static class SourceGeneratedTestingPlatformBuilderHook
    {
        public static void AddExtensions(Microsoft.Testing.Platform.Builder.ITestApplicationBuilder testApplicationBuilder,string[] _)
        {
            testApplicationBuilder.AddTestFramework(new Microsoft.Testing.Framework.Configurations.TestFrameworkConfiguration(System.Environment.ProcessorCount),
                new DemoTest.SourceGeneratedTestNodesBuilder());
        }
    }
}

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by Microsoft Testing Framework Generator.
// </auto-generated>
//------------------------------------------------------------------------------

namespace DemoTest
{
    using DemoTest;
    using ColGen = global::System.Collections.Generic;
    using CA = global::System.Diagnostics.CodeAnalysis;
    using Sys = global::System;
    using Tasks = global::System.Threading.Tasks;
    using Msg = global::Microsoft.Testing.Platform.Extensions.Messages;
    using MSTF = global::Microsoft.Testing.Framework;
    using Cap = global::Microsoft.Testing.Platform.Capabilities.TestFramework;
    using TrxReport = global::Microsoft.Testing.Extensions.TrxReport.Abstractions;

    [CA::ExcludeFromCodeCoverage]
    public sealed class SourceGeneratedTestNodesBuilder : MSTF::ITestNodesBuilder
    {
        private sealed class ClassCapabilities : TrxReport::ITrxReportCapability
        {
            bool TrxReport::ITrxReportCapability.IsSupported { get; } = true;
            void TrxReport::ITrxReportCapability.Enable() {}
        }

        public ColGen::IReadOnlyCollection<Cap::ITestFrameworkCapability> Capabilities { get; } = new Cap::ITestFrameworkCapability[1] { new ClassCapabilities() };

        public Tasks::Task<MSTF::TestNode[]> BuildAsync(MSTF::ITestSessionContext testSessionContext)
        {
            ColGen::List<MSTF::TestNode> namespace1Tests = new();
            namespace1Tests.Add(DemoTest_UnitTest1.TestNode);

            MSTF::TestNode root = new MSTF::TestNode
            {
                StableUid = "DemoTest",
                DisplayName = "DemoTest",
                Properties = Sys::Array.Empty<Msg::IProperty>(),
                Tests = new MSTF::TestNode[]
                {
                    new MSTF::TestNode
                    {
                        StableUid = "DemoTest.DemoTest",
                        DisplayName = "DemoTest",
                        Properties = Sys::Array.Empty<Msg::IProperty>(),
                        Tests = namespace1Tests.ToArray(),
                    },
                },
            };

            return Tasks::Task.FromResult(new MSTF::TestNode[1] { root });
        }
    }
}

Code and pdf at

https://ignatandrei.github.io/RSCG_Examples/v2/docs/MSTest