The MediaWiki core tests are a bit of a mess, tends to be slow and
require a working MediaWiki installation.
We could certainly extract tests that exercise a single function and do
not depend on having mw installed. Ie unit tests. Doing so, we could
have devs and CI run the lightweight/fast unit tests and skip the slow
tests, hopefully saving a lot of time.
Another interest, is that the resulting unit tests suite will give us a
good overview of our code coverage. We could probably generate a
coverage report quite fast tricking people in writing more unit tests to
enhance the metric.
I am not sure whom to bring the subject to nor how to get a champion
elected to pursue that Augeas cleaning. I am sure MediaWiki Core team
will have some good ideas :-]
There is a task https://phabricator.wikimedia.org/T87781
Antoine "hashar" Musso