Test some major toolkits
Presumably gtk, qt, motif, etc. have test suites with some non-trivial window system interaction. This will let us get beyond "well XTS passed" to "apps still work the way we expect".
Presumably gtk, qt, motif, etc. have test suites with some non-trivial window system interaction. This will let us get beyond "well XTS passed" to "apps still work the way we expect".