Fail fast if expectedOutput does not exist (#293)
Fail fast if expectedOutput does not exist (#293)

* Fail fast if expectedOutput does not exist rather than garbage collection error which is totally misleading

* Fix up mistakes

* made the message little clearer

* Clarify error message

gsteacy/ts-loader,MortenHoustonLudvigsen/ts-loader,jbrantly/ts-loader,jbrantly/ts-loader,TypeStrong/ts-loader,MortenHoustonLudvigsen/ts-loader,TypeStrong/ts-loader,gsteacy/ts-loader,gsteacy/ts-loader,MortenHoustonLudvigsen/ts-loader,jbrantly/ts-loader