Azure devops not running xunit tests - azure-devops

Question

In test run log I have Run UnitTests step, which uses Visual Studio Test. However I see log message:
No test is available in C:\stuff\Debug\x64\bin\x86\ilc\MyApp.Test.dll some_other_dlls Make sure that test discoverer & executors are registered and platform & framework version settings are appropriate and try again.
Test are visible in visual studio, and I can run all of them (I have over 50 tests).
I have xunit.runner.visualstudio package installed. What I am missing, why Azure ignores my tests?
**************** Starting test execution *********************
\vstest.console.exe "#C:\path\fadisfjla.tmp"
Microsoft (R) Test Execution Command Line Tool Version 16.4.0
Copyright (c) Microsoft Corporation. All rights reserved.
vstest.console.exe "C:\dir\Release\x64\bin\arm\MyApp.Test\testhost.dll"
"C:\dir\Release\x64\bin\arm\MyApp.Test\xunit.runner.visualstudio.uwp.testadapter.dll"
"C:\dir\Release\x64\bin\arm\ilc\MyApp.Test.dll"
"C:\dir\Release\x64\bin\x86\MyApp.Test\testhost.dll"
"C:\dir\Release\x64\bin\x86\MyApp.Test\xunit.runner.visualstudio.uwp.testadapter.dll"
"C:\dir\Release\x64\bin\x86\ilc\MyApp.Test.dll"
/Settings:"C:\tmp\fadslfj.tmp.runsettings"
/EnableCodeCoverage
/Logger:"trx"
/TestAdapterPath:"C:\dir\Release\x64"
Starting test execution, please wait...
Test run will use DLL(s) built for framework .NETFramework,Version=v4.0 and platform X86. Following DLL(s) do not match framework/platform settings.
testhost.dll is built for Framework .NETStandard,Version=v1.4 and Platform AnyCPU.
xunit.runner.visualstudio.uwp.testadapter.dll is built for Framework .NETCore,Version=v5.0 and Platform AnyCPU.
MyApp.Test.dll is built for Framework .NETFramework,Version=v4.0 and Platform ARM.
testhost.dll is built for Framework .NETStandard,Version=v1.4 and Platform AnyCPU.
xunit.runner.visualstudio.uwp.testadapter.dll is built for Framework .NETCore,Version=v5.0 and Platform AnyCPU.
Go to more details on managing these settings.
Microsoft (R) Coverage Collection Tool Version 16.0.30319.200
Copyright (c) Microsoft Corporation. All rights reserved.
1.5873
A total of 6 test files matched the specified pattern.
No test is available in C:\dir\Release\x64\bin\arm\MyApp.Test\testhost.dll C:\dir\Release\x64\bin\arm\MyApp.Test\xunit.runner.visualstudio.uwp.testadapter.dll C:\dir\Release\x64\bin\arm\ilc\MyApp.Test.dll C:\dir\Release\x64\bin\x86\MyApp.Test\testhost.dll C:\dir\Release\x64\bin\x86\MyApp.Test\xunit.runner.visualstudio.uwp.testadapter.dll C:\dir\Release\x64\bin\x86\ilc\MyApp.Test.dll. Make sure that test discoverer & executors are registered and platform & framework version settings are appropriate and try again.
Microsoft (R) Coverage Collection Tool Version 16.0.30319.200
Copyright (c) Microsoft Corporation. All rights reserved.
Results File: C:\path\fdsfdsfd.trx
Attachments:
C:\path\file-dfsfdsfe.coverage
Vstest.console.exe exited with code 0.
In my project file
<PackageReference Include="xunit.runner.visualstudio">
<Version>2.4.1</Version>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
<PrivateAssets>all</PrivateAssets>
</PackageReference>

Answer 1

First, make sure you have added the xunit.runner.visualstudio package. And then make sure you have pointed to your generated test assemblies under Test selection/Test filesin Visual Studio Test task, for example:
**\bin\$(BuildConfiguration)\**\*test*.dll
!**\obj\**
!**\xunit.runner.visualstudio.testadapter.dll
!**\xunit.runner.visualstudio.dotnetcore.testadapter.dll
Check the following link:
https://xunit.net/docs/getting-test-results-in-azure-devops

Answer 2

It turns out that if You have UWP project for Windows version 1803, and refrence it from test project in this version it ignores all tests in test project. I think this is issue in xunit or windows sdk. If just test project is updated to 1903 it works flawlessly.