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;;;; -*- Mode: Lisp; indent-tabs-mode: nil -*-
;;;; * FiveAM Example (poor man's tutorial)
(asdf:oos 'asdf:load-op :fiveam)
(defpackage :it.bese.fiveam.example
(:use :common-lisp
(in-package :it.bese.fiveam.example)
;;;; First we need some functions to test.
(defun add-2 (n)
(+ n 2))
(defun add-4 (n)
(+ n 4))
;;;; Now we need to create a test which makes sure that add-2 and add-4
;;;; work as specified.
;;;; we create a test named ADD-2 and supply a short description.
(test add-2
"Test the ADD-2 function" ;; a short description
;; the checks
(is (= 2 (add-2 0)))
(is (= 0 (add-2 -2))))
;;;; we can already run add-2. This will return the list of test
;;;; results, it should be a list of two test-passed objects.
(run 'add-2)
;;;; since we'd like to have some kind of readbale output we'll explain
;;;; the results
(explain! (run 'add-2))
;;;; or we could do both at once:
(run! 'add-2)
;;;; So now we've defined and run a single test. Since we plan on
;;;; having more than one test and we'd like to run them together let's
;;;; create a simple test suite.
(def-suite example-suite :description "The example test suite.")
;;;; we could explictly specify that every test we create is in the the
;;;; example-suite suite, but it's easier to just change the default
;;;; suite:
(in-suite example-suite)
;;;; now we'll create a new test for the add-4 function.
(test add-4
(is (= 0 (add-4 -4))))
;;;; now let's run the test
(run! 'add-4)
;;;; we can get the same effect by running the suite:
(run! 'example-suite)
;;;; since we'd like both add-2 and add-4 to be in the same suite, let's
;;;; redefine add-2 to be in this suite:
(test add-2 "Test the ADD-2 function"
(is (= 2 (add-2 0)))
(is (= 0 (add-2 -2))))
;;;; now we can run the suite and we'll see that both add-2 and add-4
;;;; have been run (we know this since we no get 4 checks as opposed to
;;;; 2 as before.
(run! 'example-suite)
;;;; Just for fun let's see what happens when a test fails. Again we'll
;;;; redefine add-2, but add in a third, failing, check:
(test add-2 "Test the ADD-2 function"
(is (= 2 (add-2 0)))
(is (= 0 (add-2 -2)))
(is (= 0 (add-2 0))))
;;;; Finally let's try out the specification based testing.
(defun dummy-add (a b)
(+ a b))
(defun dummy-strcat (a b)
(concatenate 'string a b))
(test dummy-add
(for-all ((a (gen-integer))
(b (gen-integer)))
;; assuming we have an "oracle" to compare our function results to
;; we can use it:
(is (= (+ a b) (dummy-add a b)))
;; if we don't have an oracle (as in most cases) we just ensure
;; that certain properties hold:
(is (= (dummy-add a b)
(dummy-add b a)))
(is (= a (dummy-add a 0)))
(is (= 0 (dummy-add a (- a))))
(is (< a (dummy-add a 1)))
(is (= (* 2 a) (dummy-add a a)))))
(test dummy-strcat
(for-all ((result (gen-string))
(split-point (gen-integer :min 0 :max 10000)
(< split-point (length result))))
(is (string= result (dummy-strcat (subseq result 0 split-point)
(subseq result split-point))))))
(test random-failure
(for-all ((result (gen-integer :min 0 :max 1)))
(is (plusp result))
(is (= result 0))))
(run! 'example-suite)
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