CODEWITHSUNDEEP
visual-studiounit-testingnunit
user337598
user337598

Reputation:

Visual Studio New project wont run tests

Visual Studio 2019 is not detecting or discovering NUNit nor MSTest unit tests at all. I installed it fresh just a week ago. The MS guide here https://learn.microsoft.com/en-us/visualstudio/test/getting-started-with-unit-testing?view=vs-2019&tabs=mstest does not work.

A few threads hold possible solutions, but none that I've tried helped have helped. I'm new to C# so much of the steps have taken a long time to figure out, but while my application is progressing nicely I really want to work and learn in a TDD style. Even if a create a new blank MSTest project, with no application code or libs in the solution at all, the example/template project does not work, so I'm missing something big someplace. (I have .NET Core SDKs installed - my intent is to target macOS and linux at a future point.)

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <IsPackable>false</IsPackable>
    <LangVersion>latest</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="nunit" Version="3.13.0" />
    <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
  </ItemGroup>
</Project>

Threads I have tried: Tests not running in Test Explorer Why will Visual Studio 2019 will not run my unit tests? Visual Studio 2019 Test Explorer puts all tests under "Not Run Tests" If I create a project targeting .NET 4.7 all is good, it's when I want to target Core that I'm unstuck, if that helps.

Stuck again I had to install a component called "NUnit 3", https://marketplace.visualstudio.com/items?itemName=NUnitDevelopers.NUnitTemplatesforVisualStudio worked for a moment... but when I added a testcase, it all broke again.

Did the nuget package updates, still not working.

I cloned. from git this project https://github.com/dotnet/samples/tree/master/core/getting-started/unit-testing-using-nunit And it does not work either.

I then re-installed 2019, and emailed my project to a friend, who merely removed the nunit nuget modules, added them back and then it worked for him, but the project he sent me back did not work. Module versions unchanged

I opened the same project in the Microsoft developer VM/iso image and the project works just fine. so it's my environment that is incompatible with nunit somehow. Is there a way to see some traces?

Changed the installation drive from D: to C: I get this error now

Testhost process exited with error: A fatal error occurred, the required library hostfxr.dll could not be found.
If this is a self-contained application, that library should exist in [C:\Users\zapho\src\c#\tutorials\working\ConsoleApp1\ConsoleApp1\NUnit.Tests2\bin\Debug\netcoreapp3.1\].
If this is a framework-dependent application, install the runtime in the default location [C:\Program Files\dotnet] or use the DOTNET_ROOT environment variable to specify the runtime location.
. Please check the diagnostic logs for more information.
Testhost process exited with error: A fatal error occurred, the required library hostfxr.dll could not be found.
If this is a self-contained application, that library should exist in [C:\Users\zapho\src\c#\tutorials\working\ConsoleApp1\ConsoleApp1\NUnit.Tests2\bin\Debug\netcoreapp3.1\].
If this is a framework-dependent application, install the runtime in the default location [C:\Program Files\dotnet] or use the DOTNET_ROOT environment variable to specify the runtime location.
. Please check the diagnostic logs for more information.

Upvotes: 1

Views: 4189

Answers (2)

Rob Prouse
Rob Prouse

Reputation: 22647

You need to add the Microsoft.NET.Test.Sdk NuGet package to your solution to run tests in Visual Studio.

Modify your project file,

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <IsPackable>false</IsPackable>
    <LangVersion>latest</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="nunit" Version="3.13.0" />
    <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.1" />
  </ItemGroup>
</Project>

Upvotes: 4

user337598
user337598

Reputation:

Fixed it by eventually setting environment variable

DOTNET_ROOT=D:\Program Files\dotnet\

as per an answer https://stackoverflow.com/a/61453119/337598

Upvotes: 0

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