2 replies

Error with Lookahead Assertions in Email Schema for Property-Based Testing

Hi folks.
I'm using schema to generate arbitraries for a property based test (using fast-check).
The issue is that when using

const EmailSchema = SCH.String.pipe(SCH.pattern(/^(?!\.)(?!.*\.\.)([A-Z0-9_+-.]*)[A-Z0-9_+-]@([A-Z0-9][A-Z0-9-]*\.)+[A-Z]{2,}$/))

const EmailSchema = SCH.String.pipe(SCH.pattern(/^(?!\.)(?!.*\.\.)([A-Z0-9_+-.]*)[A-Z0-9_+-]@([A-Z0-9][A-Z0-9-]*\.)+[A-Z]{2,}$/))

I get

Assertions of kind Lookahead not implemented yet!

Assertions of kind Lookahead not implemented yet!

Has anyone come across this before?