On https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Popups/+/929398 it reports coverage is 0 but Popups has both JavaScript and PHPUnit coverage. Is this misconfigured. Perhaps it's not aware of the mechanism for which coverage is collected?
Topic on Talk:Continuous integration/Codehealth Pipeline
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This message links to https://sonarcloud.io/summary/new_code?id=mediawiki-extensions-Popups&branch=929398-2 which says 0% coverage on 9 new lines to cover. Following that link, I get to https://sonarcloud.io/component_measures?id=mediawiki-extensions-Popups&branch=929398-2&metric=new_coverage&view=list, which shows lines in files that don't seem to be covered by tests in https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Popups/+/929398
SonarCloud does seem to have knowledge of code coverage for Popups (https://sonarcloud.io/component_measures?metric=coverage&view=list&id=mediawiki-extensions-Popups), although seemingly only for PHP (https://sonarcloud.io/component_measures?id=mediawiki-extensions-Popups&metric=coverage). For JS coverage, make sure that your `npm run coverage` command is generating a file in `coverage/lcov.info`.
Hopefully this does it! https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Popups/+/930660
There was no coverage/lcov.info file.