This is the REPL development workflow diagram from the Learn #ClojureScript book by Andrew Meredith. Looking at it, I realise that I've been missing the opportunity to write unit tests as well as I do REPL exploration. TIL!
The book: https://www.learn-clojurescript.com/
@gosha yeah, it's seems like a simple thing – copying text from one place to another – that's really super useful. and clojure's "it's just data" makes this very easy, because it's really just copying text. i don't remember ever writing a mock in a clojure unit test