=== tests/cases/compiler/enumMapBackIntoItself.ts ===
enum TShirtSize {
>TShirtSize : TShirtSize

   Small,
>Small : TShirtSize

   Medium,
>Medium : TShirtSize

   Large
>Large : TShirtSize
}
var mySize = TShirtSize.Large;
>mySize : TShirtSize
>TShirtSize.Large : TShirtSize
>TShirtSize : typeof TShirtSize
>Large : TShirtSize

var test = TShirtSize[mySize];
>test : string
>TShirtSize[mySize] : string
>TShirtSize : typeof TShirtSize
>mySize : TShirtSize

// specifically checking output here, bug was that test used to be undefined at runtime
test + ''
>test + '' : string
>test : string
>'' : string