Error when uploading Xamarin UI Test in .NET 8

Question

I've got a Xamarin UI test project that I've just updated to .NET 8 (from 4.6.1). I've updated the nuget packages to the latest version also. The tests build and run locally with no issue.

Packages:

• Microsoft.NET.Test.Sdk 17.8.0

• NUnit 3.14.0

• NUnit3TestAdapter 4.5.0

• Xamarin.UITest 4.3.1

I'm trying to upload with the app center cli using the command "appcenter test run uitest". I've got the "uitest-tools-dir" parameter set to the build folder of the project as this spits out "test-cloud.exe" from the Xamarin.UITest package.

When running the command in powershell, I get the following error :

System.IO.FileNotFoundException: Could not load file or assembly 'netstandard, Version=2.1.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The system cannot find the file specified.
   at Xamarin.UITest.CLI.Program.Main(String[] args)

• That seemed a simple enough error to fix, right? I've tried adding the below to my csproj. This just results in a warning icon in visual studio under the dependencies tree for that reference.

  <ItemGroup>
      <Reference Include="netstandard" />
  </ItemGroup>
  

• Tried adding a reference to the NETStandard.Library nuget package

• Adding this to my csproj:

  <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
  

None of these have worked (still no netstandard dll in my build output). I'm wondering if I'm missing something simple here? Any ideas?

Answer 1

I want to report per this bug: https://github.com/microsoft/appcenter/issues/2637

I was able to get Xamarin.UITest to work on .NET 8. There are still some interesting issues that I have had to work through, but for the most part, it works well.

Answer 2

As far as I know, they have not yet configured Xamarin.UITest to .Net 8 and that work is being worked on now in order to make Xamarin.UITest compatible with .Net 8. However, it is compatible with .Net 6 and you should be able to change your project to .Net 6 till Xamarin.UITest does the updates needed for .Net 8