Clojure unit testing frameworks

Unit testing^[6] is the testing of an individual software component or module. Clojure provides a number of testing frameworks for unit testing.

Let's create a Clojure project where we can write our tests, using the following command: lein new testing-example.

The clojure.test framework

The clojure.test framework (http://clojure.github.io/clojure/clojure.test-api.html) is the default Clojure unit testing framework that comes with the Clojure standard library. By default, Leiningen creates a testing directory with each new project:

$ tree test

├── test
│   └── testing_example
│       └── core_test.clj

This directory has one test file, called core_test.clj: 

(ns testing-example.core-test
  (:require [clojure.test :refer :all]
            [testing-example.core :refer :all]))

(deftest a-test
  (testing "FIXME, I fail."
(is (= 0 1))))

This file imports the Clojure testing namespace, as well as the core file from the src directory. The file contains one test method. Let...