Unable to swap TestingPlatformExplorer sample to NUnit

[joshcomley]

I have attempted to adapt the sample, but when I run, it doesn't detect any tests.

If I remove Program.cs, it will run and detect the tests.

With Program.cs, I get the following:

I have made the changes outlined below to the TestingPlatformExplorer sample project.

It feels like this should just work?

TestingPlatformExplorer.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
    <RootNamespace>TestingPlatformExplorer</RootNamespace>
    <ManagePackageVersionsCentrally>false</ManagePackageVersionsCentrally>
    <EnableNUnitRunner>true</EnableNUnitRunner>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="NUnit" Version="3.14.0" />
    <PackageReference Include="NUnit3TestAdapter" Version="5.2.0" />
    <!-- Update to the last version if needed -->
    <PackageReference Include="Microsoft.Testing.Platform" Version="1.9.1" />

    <!-- Needed to support the Trx capability -->
    <PackageReference Include="Microsoft.Testing.Extensions.TrxReport.Abstractions" Version="1.9.1" />

<!--    &lt;!&ndash; Add the trx extension &ndash;&gt;-->
    <PackageReference Include="Microsoft.Testing.Extensions.TrxReport" Version="1.9.1" />

    <PackageReference Include="Microsoft.Testing.Extensions.CodeCoverage" Version="18.0.4" />

    <PackageReference Include="Microsoft.Testing.Platform.MSBuild" Version="1.9.1" />
    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
  </ItemGroup>

  <ItemGroup>
    <None Update="TestingPlatformExplorer.testingplatformconfig.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
  </ItemGroup>

  <ItemGroup>
    <ProjectCapability Include="DiagnoseCapabilities" />
    <ProjectCapability Include="TestingPlatformServer" />
    <ProjectCapability Include="TestContainer" />
  </ItemGroup>

</Project>

Program.cs

using System.Reflection;

using Microsoft.Testing.Platform.Builder;

using TestingPlatformExplorer.TestingFramework;

var testApplicationBuilder = await TestApplication.CreateBuilderAsync(args);
// Register the testing framework
testApplicationBuilder.AddTestingFramework(() => new[] { Assembly.GetExecutingAssembly() });
using var testApplication = await testApplicationBuilder.BuildAsync();
return await testApplication.RunAsync();

UnitTests.cs

using NUnit.Framework;

using TestingPlatformExplorer.TestingFramework;

using Assert = NUnit.Framework.Assert;

namespace TestingPlatformExplorer.UnitTests;

[TestFixture]
public class SomeTests
{
    [Test]
    public static void TestMethod1() => Assert.AreEqual(1, 1);

    [Test]
    public static void TestMethod2() => Assert.AreEqual(1, 2);

    [Test]
    public static void TestMethod3(ITestOutputHelper testOutputHelper)
    {
        testOutputHelper.WriteLine("I'm running TestMethod3");

        try
        {
            int a = 1;
            int b = 0;
            int c = a / b;

            Assert.AreEqual(c, 2);
        }
        catch (Exception ex)
        {
            testOutputHelper.WriteErrorLine(ex.ToString());
            throw;
        }
    }

    [Ignore("Temporary disabled")]
    [Test]
    public static void TestMethod4() => Assert.AreEqual(1, 1);
}

[Evangelink]

@joshcomley this is probably not the best example to get started. Here are a couple of problems:

1. You are registering the wrong test framework. On this example, we do everything by hand and so you need to replace the line testApplicationBuilder.AddTestingFramework(() => new[] { Assembly.GetExecutingAssembly() }); that register the local test framework by the corresponding call from NUnit testApplicationBuilder.AddNUnit(() => new[] { Assembly.GetExecutingAssembly() });

2. I don't know enough NUnit but TestMethod3 does not compile, ITestOutputHelper doesn't exist (I think that's xUnit type).

3. In the current form, you won't be able to use dotnet test because it would fallback to using VSTest. You would need to register it in the global.json (if you have .NET 10 SDK installed) see https://learn.microsoft.com/dotnet/core/tools/dotnet-test?tabs=dotnet-test-with-vstest or use TestingPlatformDotnetTestSupport to true for SDKs before that (see https://learn.microsoft.com/dotnet/core/testing/unit-testing-nunit-runner-intro#enable-nunit-runner-in-a-nunit-project).