Tag: testing

Go Test Coverage Not Shown on Gitlab

by firodj, posted in Programming

If the coverage not shown on MR diffs:

  • ensure the giltlab.yaml job artifact field config is correct.
  • on the job logs the artifact is success upload.
  • the coverage report contents pointing the files to correct path (or relative path)

The gocover-cobertura output may contain absolute paths that the gitlab runner cannot match. So ensure the content of coverage reports using relative paths, by replace then using sed command.

For example, your module name in go.mod:


module my-app

go 1.23.2

Then you need to do sed command the test-coverage.xml file with:


$ sed -i "s=<source>.*</source>=<source>./</source>=g" test-coverage.xml
$ sed -i "s;filename=\"my-app/;filename=\";g" test-coverage.xml

The visualizer is shown on MR. Run the pipeline again and ensure it success. Open the Changes tab to show file diffs and see the coverage green marker next to the line number.

If still not shown, then download the test-coverage.xml artifact and check its contents to use correct relative path to root project.

Next, open the developer tools on your browser, open Network / XHR tab, then check the coverage_reports.json file contents. It should not be empty.

Good luck !