add tests for case when contentInset is not 0
add tests for case when contentInset is not 0

fabianpimminger/refresher,ajijoyo/refresher,MadAppGang/refresher,staticdreams/refresher,Chovans/refresher,Chovans/refresher,NarrativeTeam/refresher,fabianpimminger/refresher,ajijoyo/refresher,NarrativeTeam/refresher,cszrs/refresher,jcavar/refresher,cszrs/refresher,fabianpimminger/refresher,darekxan/refresher,kennydust/refresher,cszrs/refresher,kennydust/refresher,ajijoyo/refresher,darekxan/refresher,Chovans/refresher,MadAppGang/refresher,staticdreams/refresher,staticdreams/refresher,jcavar/refresher