fetchart: minor restructuring of tests.
fetchart: minor restructuring of tests.

beetbox/beets,ibmibmibm/beets,jackwilsdon/beets,SusannaMaria/beets,Kraymer/beets,sampsyo/beets,sampsyo/beets,madmouser1/beets,shamangeorge/beets,ibmibmibm/beets,sampsyo/beets,beetbox/beets,MyTunesFreeMusic/privacy-policy,jackwilsdon/beets,madmouser1/beets,SusannaMaria/beets,jackwilsdon/beets,shamangeorge/beets,SusannaMaria/beets,shamangeorge/beets,shamangeorge/beets,MyTunesFreeMusic/privacy-policy,MyTunesFreeMusic/privacy-policy,sampsyo/beets,pkess/beets,pkess/beets,ibmibmibm/beets,jackwilsdon/beets,Kraymer/beets,SusannaMaria/beets,beetbox/beets,pkess/beets,madmouser1/beets,Kraymer/beets,madmouser1/beets,ibmibmibm/beets,pkess/beets,MyTunesFreeMusic/privacy-policy,beetbox/beets,Kraymer/beets