Add tests for the device and rule_tree accessors
Add tests for the device and rule_tree accessors

eddyb/servo,fiji-flo/servo,pyfisch/servo,pyfisch/servo,thiagopnts/servo,splav/servo,CJ8664/servo,upsuper/servo,splav/servo,rnestler/servo,sadmansk/servo,szeged/servo,DominoTree/servo,SimonSapin/servo,peterjoel/servo,KiChjang/servo,CJ8664/servo,upsuper/servo,ConnorGBrewster/servo,SimonSapin/servo,mattnenterprise/servo,cbrewster/servo,upsuper/servo,emilio/servo,ConnorGBrewster/servo,sadmansk/servo,canaltinova/servo,pyfisch/servo,splav/servo,mbrubeck/servo,DominoTree/servo,eddyb/servo,dsandeephegde/servo,pyfisch/servo,splav/servo,eddyb/servo,eddyb/servo,sadmansk/servo,KiChjang/servo,jimberlage/servo,paulrouget/servo,jimberlage/servo,larsbergstrom/servo,paulrouget/servo,notriddle/servo,larsbergstrom/servo,SimonSapin/servo,nnethercote/servo,mbrubeck/servo,emilio/servo,rnestler/servo,nnethercote/servo,dati91/servo,peterjoel/servo,dsandeephegde/servo,szeged/servo,ConnorGBrewster/servo,SimonSapin/servo,sadmansk/servo,szeged/servo,KiChjang/servo,KiChjang/servo,dsandeephegde/servo,CJ8664/servo,canaltinova/servo,emilio/servo,larsbergstrom/servo,larsbergstrom/servo,fiji-flo/servo,avadacatavra/servo,anthgur/servo,notriddle/servo,avadacatavra/servo,peterjoel/servo,notriddle/servo,thiagopnts/servo,dati91/servo,szeged/servo,KiChjang/servo,emilio/servo,dati91/servo,upsuper/servo,CJ8664/servo,notriddle/servo,CJ8664/servo,sadmansk/servo,DominoTree/servo,dsandeephegde/servo,saneyuki/servo,ConnorGBrewster/servo,saneyuki/servo,mbrubeck/servo,szeged/servo,splav/servo,DominoTree/servo,eddyb/servo,peterjoel/servo,szeged/servo,fiji-flo/servo,upsuper/servo,saneyuki/servo,DominoTree/servo,cbrewster/servo,anthgur/servo,mbrubeck/servo,larsbergstrom/servo,splav/servo,KiChjang/servo,avadacatavra/servo,peterjoel/servo,larsbergstrom/servo,avadacatavra/servo,peterjoel/servo,canaltinova/servo,saneyuki/servo,rnestler/servo,rnestler/servo,avadacatavra/servo,DominoTree/servo,canaltinova/servo,cbrewster/servo,saneyuki/servo,cbrewster/servo,peterjoel/servo,rnestler/servo,nnethercote/servo,thiagopnts/servo,thiagopnts/servo,saneyuki/servo,peterjoel/servo,paulrouget/servo,splav/servo,SimonSapin/servo,upsuper/servo,upsuper/servo,ConnorGBrewster/servo,nnethercote/servo,emilio/servo,jimberlage/servo,nnethercote/servo,pyfisch/servo,paulrouget/servo,canaltinova/servo,notriddle/servo,DominoTree/servo,cbrewster/servo,splav/servo,thiagopnts/servo,fiji-flo/servo,szeged/servo,emilio/servo,dati91/servo,mattnenterprise/servo,KiChjang/servo,eddyb/servo,splav/servo,peterjoel/servo,ConnorGBrewster/servo,KiChjang/servo,eddyb/servo,nnethercote/servo,SimonSapin/servo,CJ8664/servo,larsbergstrom/servo,thiagopnts/servo,CJ8664/servo,dsandeephegde/servo,dati91/servo,jimberlage/servo,saneyuki/servo,mattnenterprise/servo,canaltinova/servo,pyfisch/servo,mbrubeck/servo,paulrouget/servo,peterjoel/servo,anthgur/servo,dati91/servo,notriddle/servo,emilio/servo,dsandeephegde/servo,larsbergstrom/servo,mattnenterprise/servo,avadacatavra/servo,canaltinova/servo,paulrouget/servo,canaltinova/servo,pyfisch/servo,jimberlage/servo,DominoTree/servo,anthgur/servo,cbrewster/servo,nnethercote/servo,mattnenterprise/servo,saneyuki/servo,avadacatavra/servo,notriddle/servo,dati91/servo,jimberlage/servo,paulrouget/servo,notriddle/servo,CJ8664/servo,rnestler/servo,pyfisch/servo,SimonSapin/servo,paulrouget/servo,anthgur/servo,fiji-flo/servo,jimberlage/servo,DominoTree/servo,saneyuki/servo,mattnenterprise/servo,szeged/servo,thiagopnts/servo,anthgur/servo,fiji-flo/servo,KiChjang/servo,nnethercote/servo,fiji-flo/servo,sadmansk/servo,dsandeephegde/servo,szeged/servo,thiagopnts/servo,pyfisch/servo,cbrewster/servo,mattnenterprise/servo,mbrubeck/servo,DominoTree/servo,ConnorGBrewster/servo,rnestler/servo,jimberlage/servo,nnethercote/servo,ConnorGBrewster/servo,rnestler/servo,pyfisch/servo,dati91/servo,jimberlage/servo,larsbergstrom/servo,mbrubeck/servo,nnethercote/servo,paulrouget/servo,eddyb/servo,mattnenterprise/servo,mbrubeck/servo,paulrouget/servo,szeged/servo,avadacatavra/servo,SimonSapin/servo,saneyuki/servo,sadmansk/servo,notriddle/servo,larsbergstrom/servo,anthgur/servo,anthgur/servo,fiji-flo/servo,splav/servo,sadmansk/servo,dsandeephegde/servo,emilio/servo,notriddle/servo,emilio/servo,cbrewster/servo,KiChjang/servo,upsuper/servo,emilio/servo