Diff test results

Context

Current test run for this project outputs:

====== 637 failed, 255 passed, 1 xfailed, 10 warnings in 80.24s (0:01:20) ======

There is no way all these failing tests can be fixed in one PR; however, it would be preferable NOT to break tests that were not broken in main when you're trying to merge your PR.

Is there a Github action that could check for that?

Alternatives

• openpgpjs/github-action-pull-request-benchmark runs tests both in main branch and in PR branch but compares their performance, not results
• Similarly, jenkinsci/github-pr-coverage-status-plugin compares coverage -- but this is a Jenkins plugin, not a GitHub Action

I cannot find anything else.

Decision

Implement such a script.

Consequences

It will be easier to develop the project by providing a clear summary of what was fixed and what was newly broken.