Card game: spec and generative testing
Specifications to represent the data that composes to create a deck of playing cards and functions that define a simple card game. spec generators are used to return varied sample data from those specifications. Function definitions are instrumented and check for correct arguments when those functions are called.
Create a project
Create a new Clojure project using clj-new tool for Clojure Tools.
clojure -A:new app practicalli/card-game
Use practicalli/clojure-deps-edn to add common tools
fork and clone the practicalli/clojure-deps-edn GitHub repository to ~/.clojure/ and instantly have access to dozens of tools for Clojure software development
Add the Clojure spec namespace
Open the src/practicalli/card_game.clj file and require the clojure.spec.alpha namespace
(ns practicalli.card-game.clj
(:require [clojure.spec.alpha :as spec]))
Hiding code
Each page in this guide runs a self contained REPL, so the practicalli.card-game namepace, require expressions and specifications needed for each page are included as a hidden section at the top of each page. This approach removes the need to duplicate code from previous sections.