fast-check
https://github.com/dubzzz/fast-check
TypeScript
Property based testing framework for JavaScript (like QuickCheck) written in TypeScript
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- Issues
- Add `.filterMap(...)` on arbitraries
- revisit "actual" and "expected" props on errors
- Tyche/OpenPBTStats support for better observability
- Make run metadata available during property execution
- Add `fc.float16Array()`
- Filesystem path arbitrary
- Create size-aware arbitraries for int
- arrays of streams aren't very random
- Accept readonly versions of the contraints passed to the arbitraries
- Allow record to produce readonly properties when provided readonly
- Docs
- TypeScript not yet supported