This is one of the more interesting features of clojure.spec. Are methods like [exercise ](https://clojure.github.io/clojure/branch-master/clojure.spec-api.html#clojure.spec/exercise)on the roadmap? On a related note, what are your thoughts on[ testcheck-js](https://github.com/leebyron/testcheck-js) and how it compares to js.spec?