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Make running netfx assemblies via Mono opt-in on non-Windows platforms #4908
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I see how that would be useful, it would have to be a new flag, to avoid breaking people who are relying on the current behavior. We could add it to dotnet test msbuild task, so you could put opt-out flag directly into your project (e.g. false). And as a new runconfiguration. |
This is a new feature and won't be implemented, we are focusing on adding new features to Testing.Platform instead. https://aka.ms/testingplatform |
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Description
Right now VSTest will run .NET Framework assemblies using Mono on Unix platforms. This was useful in the past but nowadays the more common usage is multi-targetting a test assembly for net462/net8 where the netfx assembly contains Windows-specific code.
This results in issues like dotnet/runtime#81395 where a test assembly tried to run on mono unexpectedly.
Steps to reproduce
Edit the .csproj to contain
<TargetFrameworks>net462;net8.0</TargetFrameworks>
and<LangVersion>Latest</LangVersion>
.Run
dotnet test
Expected behavior
Only runs the tests once, for the
net8.0
assembly.Actual behavior
Runs both the
net8.0
andnet462
assembly, the latter using Mono.Diagnostic logs
Environment
macOS 14, dotnet 8
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