Test runner 'Microsoft.Testing.Platform' is not supported

[thomhurst]

Is this a .NET 10 SDK issue?

PS D:\git\testfx> dotnet build
System.TypeInitializationException: The type initializer for 'Microsoft.DotNet.Cli.Parser' threw an exception.
 ---> System.TypeInitializationException: The type initializer for 'Microsoft.DotNet.Cli.TestCommandParser' threw an exception.
 ---> System.InvalidOperationException: Test runner 'Microsoft.Testing.Platform' is not supported.
   at Microsoft.DotNet.Cli.TestCommandParser.ConstructCommand()
   at Microsoft.DotNet.Cli.TestCommandParser..cctor()
   --- End of inner exception stack trace ---
   at Microsoft.DotNet.Cli.Parser..cctor()
   --- End of inner exception stack trace ---
   at Microsoft.DotNet.Cli.Program.ProcessArgs(String[] args, TimeSpan startupTime, ITelemetry telemetryClient)
   at Microsoft.DotNet.Cli.Program.Main(String[] args)

Using 10.0.100-preview.2.25164.34

[Youssef1313]

I assume you are using dotnet.config?

We used to use MicrosoftTestingPlatform instead of Microsoft.Testing.Platform. But in Preview 3, Microsoft.Testing.Platform will be the correct value.

[Youssef1313]

Additional note: In RC2, dotnet.config is changing to global.json:

{
  "test": {
    "runner": "Microsoft.Testing.Platform"
  }
}

[thomhurst]

@Youssef1313 Two further questions:

Does this also affect dotnet vstest ?

Also, is there any way of overriding this?

Deciding to make this a global setting seems very weird to me because lots of projects are going to be mixed. Legacy projects will probably remain VS Test for a long time, but newer projects will probably be MTP. What was the thoughts for making it global?

[Youssef1313]

dotnet vstest is only vstest.

Mixing MTP and VSTest is not a supported scenario. The two platforms are very different and simply don't work nice together.

[Evangelink]

@thomhurst please also note that with the past way of executing dotnet test, there was a feeling of I can run mixed mode solutions while in the majority of the cases people are running tests incorrectly because you do need to have options duplicated and you always end up with the MTP projects trx and coverage not merged with VSTest.