test(internal): increasing test coverage of internal/cell module
test(internal): increasing test coverage of internal/cell module

sfackler/hyper,markuskobler/hyper,yangxingpping/hyper,tshepang/hyper,hyperium/hyper,mre/hyper,ianks/hyper,hyperium/hyper,golddranks/hyper,yazaddaruvala/hyper,giftcards/hyper,steveklabnik/hyper,pyfisch/hyper,golddranks/hyper,markuskobler/hyper,peterhj/hyper,Keats/hyper,nickgonzales/hyper,lame-nickname/hyper,hannobraun/hyper,hannobraun/hyper,bonifaido/hyper,yazaddaruvala/hyper,nickgonzales/hyper,golddranks/hyper,mfeckie/hyper,Twey/hyper,nickgonzales/hyper,erickt/hyper,reem/hyper,TimNN/hyper,Keats/hyper,mitsuhiko/hyper,bheesham/hyper,tshepang/hyper,rschulman/hyper,youprofit/hyper,tshepang/hyper,achanda/hyper,hyperium/hyper,fuchsnj/hyper,Keats/hyper,Twey/hyper,mneumann/hyper,hannobraun/hyper,markuskobler/hyper,tempbottle/hyper,manuel-woelker/hyper,softprops/hyper,fhahn/hyper,fengsp/hyper,jmmaranan/hyper,Twey/hyper,clatour/hyper