Coverlet Cannot Cover Module Using MVVM Toolkit (CommunityToolkit/dotnet)

[will-jj]

With a module containing code generated by the MVVM Toolkit coverage information from Coverlet will not be created.

I have a simple repro repo here: https://github.com/will-jj/MVVM-Coverage
Additionally the following log information may provide further insight into the cause of the issue:

[coverlet] Unable to instrument module: C:\x\CoverageIssue\CoverageIssue.Tests\bin\Debug\net6.0-windows\CoverageIssue.dll, pdb without local source files, [C:\x\CoverageIssue\CoverageIssue\CommunityToolkit.Mvvm.SourceGenerators\CommunityToolkit.Mvvm.SourceGenerators.ObservablePropertyGenerator\CoverageIssue.ViewModelUsesObservableProperty.cs]

The original issue was opened here: CommunityToolkit/dotnet#264

[petli]

Hi, this is a known issue, where Coverlet needs a hint from the code generator that the source code is generated. That hint is that the file ends in .g.cs, rather than plain .cs. If MVVM Toolkit can change that in the filenames being generated Coverlet will handle it correctly.

#1164 explains more what's causing this.

[will-jj]

Thank you for the information, & apologies for overlooking the information that was available prior to opening this issue.

The change to .g.cs has been proposed in the following PR : CommunityToolkit/dotnet#284

[petli]

No problems, glad it could be solved quickly for you!