Test execution failure on Linux

Description

I have a .net core project with some unit tests. The unit test framework fails on Linux.

Steps to reproduce

Given this project file:

<Project Sdk="Microsoft.NET.Sdk">
	<Import Project="..\company.globals.props" />
	<PropertyGroup>
		<TargetFramework>netcoreapp3.1</TargetFramework>
		<OutputPath>$(BuildDir)</OutputPath>
		<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
	</PropertyGroup>

	<ItemGroup>
		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
		<PackageReference Include="MSTest.TestAdapter" Version="2.1.0" />
		<PackageReference Include="MSTest.TestFramework" Version="2.1.0" />
		<PackageReference Include="coverlet.collector" Version="1.2.0" />
	</ItemGroup>
</Project>

When run this on Red Hat Enterprise Linux 8.2, from the command line using .net core. I get a runtime exception and the test execution fails. Execute the following command from the command line: dotnet test ./foo.csproj -p:Configuration=Debug

Expected behavior

This runs absolutely fine on windows:

Test run for C:\Users\me\source\repos\foo\builds\bin\x64\Debug\netcoreapp3.1\foo.dll(.NETCoreApp,Version=v3.1)
Microsoft (R) Test Execution Command Line Tool Version 16.6.0
Copyright (c) Microsoft Corporation.  All rights reserved.

Starting test execution, please wait...

A total of 1 test files matched the specified pattern.

Test Run Successful.
Total tests: 28
     Passed: 28
 Total time: 4.6982 Seconds

Actual behavior

Test run for /home/admin/code/foo/builds/bin/x64/Debug/netcoreapp3.1/foo.dll(.NETCoreApp,Version=v3.1)
Microsoft (R) Test Execution Command Line Tool Version 16.3.0-dev+55e7e45431c9c05656c999b902686e7402664573
Copyright (c) Microsoft Corporation.  All rights reserved.

Starting test execution, please wait...

A total of 1 test files matched the specified pattern.  

An exception occurred while invoking executor 'executor://mstestadapter/v2': Protocol error

Test Run Failed.

Environment

On Linux I have:

root (/home/admin/code/foo) $ dotnet --info
.NET Core SDK (reflecting any global.json):
 Version:   3.1.105
 Commit:    99c9707ea8

Runtime Environment:
 OS Name:     rhel
 OS Version:  8
 OS Platform: Linux
 RID:         rhel.8-x64
 Base Path:   /usr/lib64/dotnet/sdk/3.1.105/

Host (useful for support):
  Version: 3.1.5
  Commit:  65cd789777

.NET Core SDKs installed:
  3.1.105 [/usr/lib64/dotnet/sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.App 3.1.5 [/usr/lib64/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 3.1.5 [/usr/lib64/dotnet/shared/Microsoft.NETCore.App]
...

On Windows (v10) I have:

.NET Core SDK (reflecting any global.json):
 Version:   3.1.301
 Commit:    7feb845744

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.18362
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\3.1.301\

Host (useful for support):
  Version: 3.1.5
  Commit:  65cd789777

.NET Core SDKs installed:
  2.1.4 [C:\Program Files\dotnet\sdk]
  2.1.202 [C:\Program Files\dotnet\sdk]
  2.1.400 [C:\Program Files\dotnet\sdk]
  2.1.602 [C:\Program Files\dotnet\sdk]
  2.1.700 [C:\Program Files\dotnet\sdk]
  3.1.201 [C:\Program Files\dotnet\sdk]
  3.1.301 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.All 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.19 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.19 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.19 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 3.1.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Operating system, Build version of vstest.console, Package version of MSTest framework and adapter

[danmincu]

In my case the fix was to run the tests into a Linux folder and to copy the *.trx file in the folder that was mounted on Windows avoiding the cross OS folder name creation problem. However, this commit should fix it https://github.com/microsoft/testfx/pull/1119/files I’ll be able to test it soon after I upgrade the testfx framework.

[Evangelink]

Hey @danmincu. I don’t know if you had time to confirm things are good now? I’ll move forward and close this ticket. If you have a repro of something that still fails, please either ping here or create a new issue.