Unit Testing
Clojure includes clojure.test namespace provides a unit testing framework.
Creating Leiningen and deps.edn projects from templates typically includes a test namespace for each source code namespace.
clojure.test is included in the standard Clojure jar file, so no additional dependencies are required.
Organising test code
Create a namespace that matches the source code namespace to be tested, with a -test postfix. For example, code to test the practicalli.playground namespace is defined in the practicalli.playground-test namespace.
The idiomatic approach is to include just the function names used from the clojure.test namespace.
(require '[clojure.test :refer [deftest is testing]])
The namespace under test should be referred, typically using the alias SUT for software under test.
(require '[practicalli.playground :as SUT])