code coverage in gitlab ci/cd for .net applications?

Question

I recently started working with C# and I am working on one of the legacy system we have. I am trying to figure out what is the code coverage for this legacy system. Here is my Sample.UnitTests.csproj file:



  
    netcoreapp3.0

    false
  

  
    
    
    
      runtime; build; native; contentfiles; analyzers; buildtransitive
      all

I did some research and found out we can use coverlet which can generate cobertura style report. I followed exactly as mentioned here on my mac box and everything works fine and I can see the report being generated correctly on my console and also it generates index.html file which we can use to visualize as well.

dotnet add package coverlet.msbuild
dotnet restore
dotnet build
dotnet test /p:CollectCoverage=true
dotnet test /p:CollectCoverage=true /p:CoverletOutputFormat=cobertura /p:Exclude="[xunit*]\*" /p:CoverletOutput="./TestResults/"
dotnet reportgenerator "-reports:TestResults/coverage.cobertura.xml" "-targetdir:TestResults/html" -reporttypes:HTML;

Now since we use gitlab ci/cd pipeline for our project - Is there any way I can make this part of my .gitlab-ci.yml file so that it can generate report automatically for me whenever build happens and everybody in my team can see it successfully. Since as of now it's all manual as I need to run those above commands on my local mac box and I can see it from my console only by clicking index.html file.

These are my stages of .gitlab-ci.yml file as shown below. If needed I can provide my yml file as well but any simple example where it can demonstrate how can I do this then it will be of great help. I tried searching a lot and couldn't find this at all on how can I do it through gitlab pipeline which uses coverlet and cobertura style report for .net applications..

stages:
  - test
  - publish
  - increment
  - deploy
  - integrationTests
  - release

Can this be done through webhook as well if needed?

user_1297009 · Answer

May need to use the actual GUID instead of *.

stages:
  - test
  - publish
  - increment
  - deploy
  - integrationTests
  - release

build-and-test:
  stage: test
  image: mcr.microsoft.com/dotnet/sdk:6.0
  script:
  - dotnet add package coverlet.msbuild
  - dotnet restore
  - dotnet build
  - 'dotnet test --collect:"XPlat Code Coverage"'
  artifacts:
    reports:
      cobertura: TestResults/*/coverage.cobertura.xml

GitLab can diff with previous Cobertura reports.

If you want HTML instead, simply include it among the artifacts. May also publish it to GitLab Pages.

user_5900626 · Answer

The other answer didn't work for me because of folder confusion. Coverlet puts the test results in folders relative to the respective unit test projects. So

Either you have to tell gitlab to search for TestResults folders everywhere via wildcards, by setting path to something like ./**/TestResults/**/coverage.cobertura.xml.
Or you provide the --results-directory option, to tell dotnet test where to put those files in the first place.

I went for the second option, gathering all results in a cobertura folder in the repo root. Here is a full, valid .gitlab-ci.yml for running tests for merge requests:

image : mcr.microsoft.com/dotnet/sdk:6.0

stages:
  - test

test:
  stage: test
  only:
    - merge_requests
  script:
    - 'dotnet test DotNetSolution 
        --collect:"XPlat Code Coverage"
        -r cobertura'
  artifacts:
    reports:
      coverage_report:
        coverage_format: cobertura
        path: cobertura/*/coverage.cobertura.xml

code coverage in gitlab ci/cd for .net applications?

2 Answers