Coverlet showing 0% code coverage

[ketanmehra30]

I have build a Roslyn analyzer with custom rules in .net standard2.0 framework and I have written test cases for rules in .net 4.8 framework project using Xunt. I have setup my coverlet code coverage and install all the required packages in test project but when ever I run the coverlet command : dotnet test /p:CollectCoverage=true /p:CoverletOutputFormat=cobertura. it gives me 0% in all the coverages

+--------+------+--------+--------+
| Module | Line | Branch | Method |
+--------+------+--------+--------+

+---------+------+--------+--------+
| | Line | Branch | Method |
+---------+------+--------+--------+
| Total | 0% | 0% | 0% |
+---------+------+--------+--------+
| Average | 0% | 0% | 0% |
+---------+------+--------+--------+

[MarcoRossignoli]

Most probably you're suffering of a known issue https://github.com/coverlet-coverage/coverlet/blob/master/Documentation/KnownIssues.md#vstest-stops-process-execution-early

You should move to the datacollector integration https://github.com/coverlet-coverage/coverlet/blob/master/Documentation/VSTestIntegration.md

[GDonets]

I tried to follow instructions for datacollector integration, but generated coverage.cobertura.xml still shows 0 coverage

[earloc]

I have a similar issue and tracked it down so far, that coverlet seems to be unable to instrument files generated by the source-generator.
Details can be found here

(copied from my comment)

Target "InstrumentModules" in file "...\.nuget\packages\coverlet.msbuild\3.2.0\build\coverlet.msbuild.targets" from project "...\repros\30_Empty_CodeCoverage\XUnit.Tests\XUnit.Tests.csproj" (target "InstrumentModulesAfterBuild" depends on it):
       Using "Coverlet.MSbuild.Tasks.InstrumentationTask" task from assembly "...\.nuget\packages\coverletTask "Coverlet.MSbuild.Tasks.InstrumentationTask"
         [coverlet] Unable to instrument module: ...\repros\30_Empty_CodeCoverage\XUnit.Tests\bin\Debug\net6.0\ConsoleApp.dll, pdb without local source files, [...\repros\30_Empty_CodeCoverage\ConsoleApp\TypealizR.SourceGenerators\TypealizR.SourceGenerators.StringLocalizer.SourceGenerator\IStringLocalizerExtensions_ConsoleApp.Resource1.cs]
         [coverlet] Unable to instrument module: ...\repros\30_Empty_CodeCoverage\XUnit.Tests\bin\Debug\net6.0\xunit.assert.dll, embedded pdb without local source files, [C:\Dev\xunit\xunit\src\xunit.assert\Asserts\Assert.cs]
         [coverlet] Unable to instrument module: ...\repros\30_Empty_CodeCoverage\XUnit.Tests\bin\Debug\net6.0\xunit.core.dll, embedded pdb without local source files, [C:\Dev\xunit\xunit\src\common\ExceptionExtensions.cs]
         [coverlet] Unable to instrument module: ...\repros\30_Empty_CodeCoverage\XUnit.Tests\bin\Debug\net6.0\xunit.execution.dotnet.dll, embedded pdb without local source files, [C:\Dev\xunit\xunit\src\xunit.execution\Extensions\ReflectionAbstractionExtensions.cs]
         [coverlet] Unable to instrument module: ...\repros\30_Empty_CodeCoverage\XUnit.Tests\bin\Debug\net6.0\xunit.runner.reporters.netcoreapp10.dll, embedded pdb without local source files, [C:\Dev\xunit\xunit\src\xunit.runner.reporters\Utility\EnvironmentHelper.cs]
         [coverlet] Unable to instrument module: ...\repros\30_Empty_CodeCoverage\XUnit.Tests\bin\Debug\net6.0\xunit.runner.utility.netcoreapp10.dll, embedded pdb without local source files, [C:\Dev\xunit\xunit\src\xunit.runner.utility\Extensions\DisposableExtensions.cs]
         [coverlet] Unable to instrument module: ...\repros\30_Empty_CodeCoverage\XUnit.Tests\bin\Debug\net6.0\xunit.runner.visualstudio.dotnetcore.testadapter.dll, embedded pdb without local source files, [/_/src/xunit.runner.visualstudio/obj/Release/netcoreapp2.1/xunit.runner.visualstudio.dotnetcore.testadapter.Version.cs]
       Done executing task "Coverlet.MSbuild.Tasks.InstrumentationTask".

This does not look connected to https://github.com/coverlet-coverage/coverlet/blob/master/Documentation/KnownIssues.md#vstest-stops-process-execution-early for me.

...\repros\30_Empty_CodeCoverage\ConsoleApp\TypealizR.SourceGenerators\TypealizR.SourceGenerators.StringLocalizer.SourceGenerator\IStringLocalizerExtensions_ConsoleApp.Resource1.cs is a file tha gets generated during the build when my source-generator runs.

[earloc]

switching to coverlet.collectordoes not seem to solve my issue.

[earloc]

When I fall back to coverlet.msbuild 2.5.1, everthing seems to be ok.

Starting with coverlet.msbuild 2.6.0 I get empty coverages. (this is no exhaustive analysis, just tested some combinations)

[earloc]

@MarcoRossignoli would you be so kind and have a look at this? Or should I better create another issue?

[earloc]

nevermind...my issue was related to #1322. Could fix it.

[daveMueller]

It is not really clear what the issue is here because of a pretty stale conversation.
The source generator issue mentioned was fixed in the current nightly.
I would suggest to try out the current nightly as we changed the heuristic for detecting assemblies which
most likely also solves this problem (consume nightly). I'm closing this issue now but feel free to reopen.