Clojure Applied

Interactive REPL Tests

Clojure programmers often work interactively at a REPL to develop functions. The workflow consists of writing a function either in the REPL or in a namespace editor, evaluating that code, and executing that code with sample inputs. Often we visually inspect the results, sometimes saving them so we can perform more detailed checks of their behavior.

The next question is whether the inputs and expected outputs are worth capturing into a test that can run all the time. Some things to consider are:

• Is the test checking business logic or verifying the behavior of chaining together standard Clojure functions? Tests for the logic of your application are almost certainly worth keeping. Simple uses of Clojure itself (say, a function ...