Code coverage report is not generated for some methods

[pavel-mikula-sonarsource]

Description

VSTest.console.exe does not include covered methods into report file. Not even as 0% covered. Theese methods are not seen by SC as covered and QG fails.

Methods

• SonarAnalyzer.Helpers.StringExtensions.SplitCamelCaseToWords
• SonarAnalyzer.Helpers.SymbolHelper.GetAllNamedTypes

Other

• Renaming file, class and method to OtherFileName.SplitCamelCaseTxWords reproduces the issue.
• Adding second method into file forces it to work as expected with 100% coverage.
• VS Enteprise is needed for local run of VSTest.console /EnableCodeCoverage
• Might be related to yield iterators (see this comment)

[andrei-epure-sonarsource]

maybe linked to https://community.sonarsource.com/t/adding-another-test-run-halves-the-code-coverage/15087/16 , there are some reproducers there as well

[andrei-epure-sonarsource]

From what we've discussed, we should:

• double check that the coverage info doesn't get generated by the vscover tool
• come up with a reproducer project
• report the issue to vstest

unless we realize there's a parsing error on our side

[Tim-Pohlmann]

1. I recreated the issue by creating a test solution with only two projects:

• .NET 8 Class library
  • contains a single file with the content of StringExtension.
• .NET 8 MS Test project
  • contains a single UT calling "thisIsAName".SplitCamelCaseToWords().ToList().

2. Run local SQ 10.5.1.90531 Enterprise
3. dotnet sonarscanner begin /k:"Local-Sandbox" /d:sonar.host.url="http://localhost:9000" /d:sonar.token="<token>" /d:sonar.cs.vscoveragexml.reportsPaths=**/*.coveragexml
4. dotnet build
5. dotnet test --collect "Code Coverage;Format=xml"
6. dotnet sonarscanner end /d:sonar.token="<token>"

A possible cause is how yield methods are reported in the .xml file:

<function block_coverage="82,22" line_coverage="70,59" blocks_covered="37" blocks_not_covered="8" lines_covered="24" lines_partially_covered="0" lines_not_covered="10" id="8360" token="0x6000005" name="MoveNext()" namespace="SonarAnalyzer.Helpers" type_name="StringExtensions.&lt;SplitCamelCaseToWords&gt;d__0">

Note that the method name is MoveNext() and not SplitCamelCaseToWords().

[mary-georgiou-sonarsource]

I tried Tim's repro but it does not work for me.
If I copy and paste exactly these commands, there are no coverage results because the file pattern cannot be found for some reason :/. Once I set the pattern to be any XML file, then coverage is normally found and reported.
Additionally, opening the coverage file, I can see the method SplitCamelCaseToWords is there.

@costin-zaharia-sonarsource do you have maybe any advice which direction I can go here?

[costin-zaharia-sonarsource]

I think this might depend on the versions of the dotnet runtime and of the coverage tool. How about Pavel's example? Is the issue still reproducible when analyzing out code?

[mary-georgiou-sonarsource]

I cannot reproduce this.
Additionally, both methods mentioned in the issue description
SonarAnalyzer.Helpers.StringExtensions.SplitCamelCaseToWords
SonarAnalyzer.Helpers.SymbolHelper.GetAllNamedTypes (now refactored to be INamedTypeSymbolExtensions.GetAllNamedTypes)
seem to both be covered on SC (see here and here).