revamp context tests that used index/key alias
revamp context tests that used index/key alias

squaredup/ractive,magicdawn/ractive,JonDum/ractive,magicdawn/ractive,thomsbg/ractive,cgvarela/ractive,JonDum/ractive,marcalexiei/ractive,squaredup/ractive,ISNIT0/ractive,ractivejs/ractive,ndimas/ractive,marcalexiei/ractive,marcalexiei/ractive,pingjiang/ractive,ISNIT0/ractive,thomsbg/ractive,JonDum/ractive,ndimas/ractive,ractivejs/ractive,thomsbg/ractive,pingjiang/ractive,ISNIT0/ractive,magicdawn/ractive,cgvarela/ractive,ndimas/ractive,cgvarela/ractive,squaredup/ractive,pingjiang/ractive,ractivejs/ractive