Re: Do google test?
Well, judging from the four apps I've attempted to launch on various Android stores...
Amazon Android - two from four apps submitted. Three day wait, then one appears on the store, the other I get an email for stating that there are problems to fix before it can go out.
Nokia X Android - all four apps submitted. Four day wait, one goes onto the store, other three get a QA failed email, plus a list of what I need to fix.
Google Play - paid $25, uploaded all four apps, all on Play within hours, no feedback.
... I have since found that the bugs spotted by Nokia and Amazon also exist on the versions on the Play store. Do Google test? Not in my experience.