Problems with .NET unit testing

Same problem as the above two individuals. Trying to run XUnit against .NET Core 3.1 / .NET Standard 2.1 projects. Tests have only recently started failing (possibly since the latest Rider update).

Running Rider 2020.2 on Mac OS 10.15.6.

Devis Nikola Stephen Kennedy,

This seems like a known issue. Please, try running tests against x64 platform explicitly via "Session Options" - I'm attaching a couple of screenshots as a reference.

Thanks Kirill Filin that helped.

Just a "me too" from me, I'm afraid, same thing started yesterday. I've found "Invalidate Caches / Restart..." makes it work again for a few runs.

For the BadImageFormatException, changing this setting to x64 seems to have fixed the problem.  

Getting an exit code 139 whenever a unit test runs a struct's public override string ToString() method.

I'm on MacOS 11.0.1 even though the version below shows 10.16 =\

JetBrains Rider 2020.3
Build #RD-203.5981.141, built on December 11, 2020
Licensed to Second Dinner / Mike Schweitzer
Subscription is active until January 8, 2021
Runtime version: 11.0.9.1+11-b1145.24 x86_64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
.NET Core 3.1.8
macOS 10.16
GC: ParNew, ConcurrentMarkSweep
Memory: 1450M
Cores: 16
Registry: debugger.new.debug.tool.window.view=true, ide.tree.horizontal.default.autoscrolling=false, performance.watcher.sampling.interval.ms=200, ide.borderless.tab.caption.in.title=false, ide.tooltip.showAllSeverities=true, show.diff.preview.as.editor.tab=true, debugger.show.values.use.inlays=false, undo.documentUndoLimit=10000, light.edit.file.open.enabled=false, performance.watcher.unresponsive.interval.ms=1000, ide.tree.expand.navigatable.on.double.click.disabled=true, search.everywhere.settings=true, show.diff.preview.as.editor.tab.with.single.click=true, parameter.info.max.visible.rows=10, ide.win.file.chooser.native=true, undo.globalUndoLimit=1000, vcs.log.show.diff.preview.as.editor.tab=true, actionSystem.fix.alt.gr=false, search.everywhere.pattern.checking=false, ide.tooltip.initialDelay=0, ide.require.transaction.for.model.changes=false, ide.debug.in.title=true, ide.new.project.model=false, rdclient.asyncActions=false
Non-Bundled Plugins: com.jetbrains.rider.fsharp, PythonCore, aws.toolkit

same like Nikola and Davis.

I have installed Rider 2020.3 and developing a dotnet 3.1 console application.

And change platform Architecture to "x64" doesn't help at all.
I do run "Cover Selected Unit Test" and get :

08:44:45.976 |I| Process C:\Users\f01bergm\AppData\Local\JetBrains\Toolbox\apps\Rider\ch-0\203.5981.141\lib\ReSharperHost\TestRunner\netcoreapp2.0\ReSharperTestRunner64.exe:3000 has exited
08:44:46.022 |V| Process was not started by this object, so requested information cannot be determined.

--- EXCEPTION #1/2 [InvalidOperationException]
Message = “Process was not started by this object, so requested information cannot be determined.”
ExceptionPath = Root.InnerException
ClassName = System.InvalidOperationException
....

Frank01 Bergmann, it seems to be the same issue as this one: https://youtrack.jetbrains.com/issue/RIDER-29932.
Please reproduce it in a newer Rider version 2021.1, collect logs and attach to this issue. Also, having a sample solution/example would be very much appreciated.

K.R.

Sofia

Hi, I'm running Rider 2021.2.1 and am unable to see any variable values while running NUnit tests. All I get on the variables is" The name 'variable' does not exist in the current context" as shown below.  

Hi Iestyn Jones,

Could you please enable `Debugger` tracing in `Help | Diagnostic Tools | Choose Trace Scenario`, then reproduce the issue once again, collect logs via `Help | Collect Logs`, disable tracing, and share the full log bundle via submitting a new support request (https://rider-support.jetbrains.com/hc/en-us/requests/new)?

Adding Microsoft.NET.Test.Sdk solved the problem for me.

I was trying to use XUnit and FluentAssertions but the Microsoft package seems to be needed for Rider to recognize tests in your solution.