Add a test to verify keys throw if not found
Add a test to verify keys throw if not found

shana/Akavache,christer155/Akavache,mms-/Akavache,martijn00/Akavache,ghuntley/AkavacheSandpit,Loke155/Akavache,MathieuDSTP/MyAkavache,shana/Akavache,bbqchickenrobot/Akavache,gimsum/Akavache,jcomtois/Akavache,MarcMagnin/Akavache,akavache/Akavache,kmjonmastro/Akavache,PureWeen/Akavache