Preventing a project from being discovered as a test project

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I have for several project a common util project which consits of some base test classe, helper class and so on. The project definition looks like this:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup Label="Globals">
    <SccProjectName>SAK</SccProjectName>
    <SccProvider>SAK</SccProvider>
    <SccAuxPath>SAK</SccAuxPath>
    <SccLocalPath>SAK</SccLocalPath>
  </PropertyGroup>

  <PropertyGroup>
    <TargetFrameworks>net461;netstandard2.0</TargetFrameworks>
    <RootNamespace>SomeRoot.Util</RootNamespace>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="FluentAssertions" Version="5.10.2" />
    <PackageReference Include="xunit" Version="2.4.1" />
  </ItemGroup>
</Project>

I assume that since it references xUnit, that both the visual studio and the dotnet test command treat it like a test project. But since it isn't I would like to somehow prevent both the visual studio and dotnet test to not recognize this project as a test project.

Removing the reference to xUnit is not an option since the base classes needs some interfaces from the xUnit package.

ms-project xunit visual-studio c#
1 Answers

Based on https://github.com/microsoft/vstest/issues/1129, there seems to be two things it checks for: IsTestProject property and ProjectCapability item of TestContainer. I remove both to be safe.

Add this to the project file:

  <PropertyGroup>
    <IsTestProject>false</IsTestProject>
  </PropertyGroup>

  <ItemGroup>
    <ProjectCapability Remove="TestContainer" />
  </ItemGroup>

This is the error that I was running into that is fixed by adding the above:

========== Starting test discovery ==========
Test project {ProjectName} does not reference any .NET NuGet adapter. Test discovery or execution might not work for this project.
It's recommended to reference NuGet test adapters in each test project in the solution.
Loaded 0 test records from the solution cache in 0.220 sec.
Microsoft.VisualStudio.TestPlatform.ObjectModel.TestPlatformException: Testhost process exited with error: Unhandled exception. System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.TestPlatform.CoreUtilities, Version=15.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.
File name: 'Microsoft.TestPlatform.CoreUtilities, Version=15.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
   at Microsoft.VisualStudio.TestPlatform.TestHost.Program.Main(String[] args)
. Please check the diagnostic logs for more information.
   at Microsoft.VisualStudio.TestPlatform.CrossPlatEngine.Client.ProxyOperationManager.ThrowOnTestHostExited(Boolean testHostExited)
   at Microsoft.VisualStudio.TestPlatform.CrossPlatEngine.Client.ProxyOperationManager.SetupChannel(IEnumerable`1 sources, String runSettings)
   at Microsoft.VisualStudio.TestPlatform.CrossPlatEngine.Client.ProxyDiscoveryManager.DiscoverTests(DiscoveryCriteria discoveryCriteria, ITestDiscoveryEventsHandler2 eventHandler)
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