[throwanem]

I'd probably try to do it with some kind of dummy framebuffer I could capture to an image file, and then inspect that image for variance against a known good snapshot. It's an approach I've seen work well with mobile app e2e testing; I grant it's heavyweight and can be somewhat imprecise, but I can't think offhand what could be much lighter and still work as well.

To be clear, I realize I'm asking a good deal here, but I'm being asked a good deal here too. If I'm to consider building a production application on this or any platform, I need considerable confidence that that platform isn't flawed in ways that may prove to mean I'll have wasted what might be a great deal of work. And if I'm going to have to design against the assumption I may need to have the application still work even when the platform doesn't, why use that platform at all?