lastgenre: add unit tests
lastgenre: add unit tests

kelvinhammond/beets,jmwatte/beets,shanemikel/beets,drm00/beets,YetAnotherNerd/beets,untitaker/beets,asteven/beets,multikatt/beets,Andypsamp/CODfinalJUNIT,swt30/beets,diego-plan9/beets,untitaker/beets,arabenjamin/beets,randybias/beets,diego-plan9/beets,sadatay/beets,PierreRust/beets,andremiller/beets,xsteadfastx/beets,jackwilsdon/beets,madmouser1/beets,tima/beets,ruippeixotog/beets,madmouser1/beets,shanemikel/beets,andremiller/beets,pkess/beets,Freso/beets,mosesfistos1/beetbox,mathstuf/beets,Freso/beets,tima/beets,jcoady9/beets,Wen777/beets,andremiller/beets,xsteadfastx/beets,shamangeorge/beets,multikatt/beets,artemutin/beets,YetAnotherNerd/beets,SusannaMaria/beets,asteven/beets,kelvinhammond/beets,LordSputnik/beets,Kraymer/beets,dfc/beets,sampsyo/beets,ttsda/beets,Andypsamp/CODjunit,beetbox/beets,gabrielaraujof/beets,MyTunesFreeMusic/privacy-policy,YetAnotherNerd/beets,kareemallen/beets,beetbox/beets,artemutin/beets,mathstuf/beets,randybias/beets,lengtche/beets,lengtche/beets,arabenjamin/beets,Dishwishy/beets,multikatt/beets,jcoady9/beets,mried/beets,Freso/beets,marcuskrahl/beets,kareemallen/beets,beetbox/beets,ttsda/beets,jcoady9/beets,m-urban/beets,ttsda/beets,Kraymer/beets,ibmibmibm/beets,swt30/beets,Andypsamp/CODjunit,drm00/beets,diego-plan9/beets,mried/beets,dfc/beets,sadatay/beets,jcoady9/beets,gabrielaraujof/beets,Dishwishy/beets,Wen777/beets,sadatay/beets,swt30/beets,lightwang1/beets,sadatay/beets,MyTunesFreeMusic/privacy-policy,jmwatte/beets,arabenjamin/beets,asteven/beets,kelvinhammond/beets,xsteadfastx/beets,lightwang1/beets,madmouser1/beets,marcuskrahl/beets,kelvinhammond/beets,SusannaMaria/beets,drm00/beets,sampsyo/beets,Andypsamp/CODfinalJUNIT,multikatt/beets,beetbox/beets,marcuskrahl/beets,untitaker/beets,lightwang1/beets,ibmibmibm/beets,lengtche/beets,shanemikel/beets,moodboom/beets,moodboom/beets,mosesfistos1/beetbox,Andypsamp/CODjunit,mried/beets,parapente/beets,dfc/beets,m-urban/beets,ibmibmibm/beets,artemutin/beets,ttsda/beets,asteven/beets,jackwilsdon/beets,pkess/beets,MyTunesFreeMusic/privacy-policy,kareemallen/beets,gabrielaraujof/beets,SusannaMaria/beets,parapente/beets,parapente/beets,pkess/beets,imsparsh/beets,shanemikel/beets,mried/beets,Andypsamp/CODjunit,m-urban/beets,sampsyo/beets,shamangeorge/beets,ruippeixotog/beets,imsparsh/beets,untitaker/beets,Andypsamp/CODjunit,LordSputnik/beets,moodboom/beets,m-urban/beets,MyTunesFreeMusic/privacy-policy,Wen777/beets,pkess/beets,mosesfistos1/beetbox,jmwatte/beets,Andypsamp/CODfinalJUNIT,lengtche/beets,LordSputnik/beets,madmouser1/beets,gabrielaraujof/beets,ruippeixotog/beets,shamangeorge/beets,artemutin/beets,lightwang1/beets,mosesfistos1/beetbox,moodboom/beets,arabenjamin/beets,Dishwishy/beets,tima/beets,jmwatte/beets,dfc/beets,PierreRust/beets,ruippeixotog/beets,jackwilsdon/beets,YetAnotherNerd/beets,shamangeorge/beets,PierreRust/beets,xsteadfastx/beets,tima/beets,SusannaMaria/beets,LordSputnik/beets,Dishwishy/beets,imsparsh/beets,marcuskrahl/beets,imsparsh/beets,parapente/beets,Andypsamp/CODfinalJUNIT,Kraymer/beets,randybias/beets,ibmibmibm/beets,Freso/beets,mathstuf/beets,randybias/beets,kareemallen/beets,Andypsamp/CODfinalJUNIT,diego-plan9/beets,Kraymer/beets,jackwilsdon/beets,sampsyo/beets,PierreRust/beets,drm00/beets,mathstuf/beets,swt30/beets