Integrate Coveralls with .Net Core to display badge in GitHub README

Today, I want to know code coverage about my dot net project, and also want to check it in GitHub directly.

I try to use Coveralls to get code coverage.

Install Nuget packages

Install coverlet.collector and coverlet.msbuild Nuget packages in project.
It can use command or Nuget package tool to install package

dotnet add package coverlet.collector
dotnet add package coverlet.msbuild

Register in Coveralls.io

Sign up with GitHub account to link GitHub repositories with coveralls.io.
After login, add the repository that you need and click sync repo

Add repo in coveralls.io

Modify Actions yaml file

Add a step for generate coverage report in yaml file after run test

Step in yaml file

You don’t need to create GITHUB_TOKEN secret, because GitHub automatically create it at the start of each workflow run.

Could check GitHub Docs to get more information.

Push code and yaml file to GitHub

Get code coverage badge for README

Login Coveralls.io and choose REPOS in menu bar.

Click Embed drop down list and copy Markdown

Finally, past it to README

Unfortunately, it isn’t updated immediately because of browser cache.

Need to clear browser cache, after the action complete.

Reference

Code Coverage in GitHub with .NET Core