http://dictionary.reference.com/browse/setup?s=t
set up
verb (adverb, mainly transitive)
....
3. to build or construct: to set up a shed
Collins, 2012
I've slowly moved from prescriptivist to descriptivist, and if you want to keep your sanity, I suggest you do too, because linguistic history has shown that people use words the way they want and will keep doing so regardless of any interventions.edit: To clarify - the author says:
I ask you to set something up for me. I don't ask you to setup something for me.
I think the genesis of this expression was "to set up <sthg>" -> "set up <sthg>" -> "setup_sthg". The "to set <sthg> up" form /is/ probably more correct in the prescriptivist sense, but my take is that this isn't really a mistake, it's intentional. "setTestClassUp" sucks because it spreads the logical units of the identifier all over the place. I want the verb in the beginning and the noun after.