如何在 Visual Studio 2017/2019 中为特定目标框架运行单元测试？

Question

I am really loving the new .csproj format. It is so much better than that dreaded (limited) project.json .

However, there is one thing that I am trying to work out. I have merged my (multiple) test projects into a single multi-targeted project.

<TargetFrameworks>netcoreapp1.0;net40;net35</TargetFrameworks>

But, there doesn't seem to be any tooling in Test Explorer in Visual Studio to select the target framework - it always just runs the first one. I found a workaround - to add a <TargetFramework> element with a specific framework...

<TargetFramework>net35</TargetFramework>

But, is there any way to select the target framework without resorting to hand-editing the MSBuild ( .csproj ) file? I am looking for some option in the GUI to do this - specifically so I don't have to remember to edit the .csproj file in order to switch frameworks before debugging a test or to remember to have to remove this line before the release.

Answer 1

I know that the question is about VS, but I find useful that when targeting multiple frameworks dotnet tests command will run tests for all frameworks in <TargetFrameworks> node:

> dotnet test
...
Test run for [projectPath]\bin\Debug\netcoreapp1.1\XUnitTestProject.dll(.NETCoreApp,Version=v1.1)
...
Test run for [projectPath]\bin\Debug\net461\XUnitTestProject.dll(.NETFramework,Version=v4.6.1)
...

NCrunch can also recognize multiple targets and run tests for every target automatically:

Answer 2

Best option currently is to change the order of your target frameworks in the csproj.

<PropertyGroup>
    <TargetFrameworks>netcoreapp2.1;net45;net46;net461;net462;net47</TargetFrameworks>
</PropertyGroup>

If wanting to debug unit tests for net45 framework, you'll need to change it to:

<PropertyGroup>
    <TargetFrameworks>net45;net46;net461;net462;net47;netcoreapp2.1</TargetFrameworks>
</PropertyGroup>

The UI for doing this in Visual Studio would be relatively simple to implement but they have not done so as of this answer.

Answer 3

It turns out that Microsoft has finally fixed this in Visual Studio 2019 (not sure exactly when).

If you specify multiple target frameworks:

<TargetFrameworks>netcoreapp2.1;net451</TargetFrameworks>

The GUI now displays:

and lets you run tests on all target platforms at once.

Answer 4

使用“或”运算符在运行设置文件中使用 TargetFrameWorkVersion。