The CoverletOutput property generated report does not use runsettings file exclusions

[fossbrandon]

Describe the bug
While trying to use coverlet to collect code coverage while ignoring certain files specified in my .runsettings file, these exclusions are not honored if I specify a value for the CoverletOutput property.

To Reproduce

• A test project with a .runsettings file linked in the csproj that excludes some files. Ex: <ExcludeByFile>**/*.sg.cs,</ExcludeByFile>
• Run the test command and specify the CoverletOutput property. Ex: dotnet test /p:CollectCoverage=true /p:CoverletOutputFormat=cobertura /p:CoverletOutput=TestResults/latest-coverage.xml
• The command will generate the normal coverage result within a generated GUID subfolder which properly excludes the files specified in the runsettings file. The coverlet output generated file (ex: latest-coverage.xml) will not exclude the same files and produces a different report.

Expected behavior
The output specified in the CoverletOutput property should properly exclude files specified in a runsettings file like the report generated without specifying that value.

Actual behavior
The report generated at the specified value for CoverletOutput produces a report that does not use the runsettings exclusions.

Configuration (please complete the following information):
Please provide more information on your .NET configuration:
* Which coverlet package and version was used?
- coverlet.collect - 6.0.2
- coverlet.msbuild - 6.0.2
* Which version of .NET is the code running on?
- .NET 8
* What OS and version, and what distro if applicable?
- Windows 11 - 10.0.22631 Build 22631
* What is the architecture (x64, x86, ARM, ARM64)?
- X64
* Do you know whether it is specific to that configuration?
- I don't think so

Additional context
If I add the additional property /p:ExcludeByFile=\"**.sg.cs\" it does properly exclude the files I want it to. I would just prefer to exclude in the runsettings file only without having to duplicate them when running the command by hand.

[Bertk]

Thank you for bringing this up.

The VSTest integration with coverlet.collector uses the .runsettings see VSTestIntegration.md

You are using coverlet.msbuild which only supports MSBuild properties e.g. /p:ExcludeByFile=\"**.sg.cs\"

dotnet test /p:CollectCoverage=true /p:CoverletOutputFormat=cobertura /p:CoverletOutput=TestResults/latest-coverage.xml