Dan Duvall and I worked on his patch refactoring MobileFrontend browser tests yesterday [1]. We got over half of the tests working on mediawiki-vagrant, but we might have caused some breakage on betalabs/jenkins. The last two builds have lots of failures (over 30), but that doesn't mean that the features themselves are broken. We'll figure it out soon.
In general the changes we made were necessary and hopefully will help get everyone running browser tests on their dev instances in the near future. Another nice thing added by Dan is the possiblity of specifying browser tests dependency on other extensions as seen in [2]. Those browser tests will not run (will be skipped) if an extension is not enabled. Instead developers will see a warning saying which extension needs to be enabled to run them.
Dan, thanks for all this work.
[1] https://gerrit.wikimedia.org/r/#/c/147115/ [2] https://gerrit.wikimedia.org/r/#/c/152993/