Synthetic cannabinoids and drug testing

[Greenport]

Sorry if a thread has already been started regarding this topic. Ernie has to quit smoking pot for awhile in order to pass a drug test and hopefully get hired (not that this place is gonna be any different than the other 25-30 places Ernie applied for with no avail...to hell with the corporate world )

Ernie is therefore wondering about synthetic cannabinoids and drug testing. He doesn't think that really oddball ones like JWH-018 would be picked up on a standard drug test but what about ones like HU-210 and the like which only differ from THC by a few carbons etc? Are the metabolites of these cannabinoids similar or the same as the ones produced by THC and thus detectable by current drug tests?

On a side-note, if Ernie were to start using a synthetic cannabinoid and it 'did' come up on a drug-test, could this be a reason to bar employment? After all, these compounds are legal as of now where Ernie is...could he make this argument and state that it is no different than say taking a tylenol?

Detailed information about the metabolites of these compounds is highly welcomed. Ernie's looking for specifics he don't just want 'You can smoke spice and still pass a drug test', he wants information (although self-experiences are welcome)