This is spec: https://clojure.org/about/spec https://clojure.org/about/spec All spec errors turn up at run time. See the guide for more details: https://clojur

This is spec: https://clojure.org/about/spec https://clojure.org/about/spec All spec errors turn up at run time. See the guide for more details: https://clojure.org/guides/spec https://clojure.org/guides/spec. You can combine spec with test.check (Clojure's quick check library) https://clojure.org/guides/spec#_generators https://clojure.org/guides/spec#_generators