dotnet test --no-build isn't running tests on built source mounted to a docker container

[david-gonzalez-pnw]

Steps to reproduce

1. Build your .net core source code, I used https://github.com/dotnet/samples/tree/master/core/getting-started/unit-testing-using-nunit in the below example and saved it in c:/source/unit-testing-using-nunit

2. Create a container using something similar to the below. Basically the pre-req is dotnet core. In our case we needed both framework and core to build our projects.

   FROM mcr.microsoft.com/dotnet/framework/sdk:4.8
   SHELL ["powershell.exe", "$ErrorActionPreference = 'Stop';$ProgressPreference='SilentlyContinue';"]    
   RUN New-Item -Type Directory -Name "tools"; `
   Push-Location tools; `
   Invoke-WebRequest -OutFile dotnet-install.ps1 -UseBasicParsing "https://dot.net/v1/dotnet-install.ps1"; `
       .\dotnet-install.ps1 -Channel 3.1; `
       Pop-Location;
   
   ENTRYPOINT powershell.exe
   

3. Start the container and bind mount a volume with your built source code

   docker run -it `
     --name dotnettest `
     --mount type=bind,source=C:/source/unit-testing-using-nunit,target=C:/source/unit-testing-using-nunit `
     dotnettestissue:latest
   

4. Run cd /source/unit-testing-using-nunit and dotnet test --no-build in the root test folder

   

   Built DLLs in Docker Container

   

Expected behavior

The tests run without a restore or build beforehand.

Actual behavior

dotnet test exits out immediately

Environment data

dotnet --info output:

.NET Core SDK (reflecting any global.json):
Version: 3.1.101
Commit: b377529

Runtime Environment:
OS Name: Windows
OS Version: 10.0.18363
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\3.1.101\

Host (useful for support):
Version: 3.1.1
Commit: a1388f194c

.NET Core SDKs installed:
3.1.101 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.App 3.1.1 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.1 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download