Getting Clojure

Spotting Bugs with clojure.test

Let’s begin our adventures in testing by building a brand-new book store inventory project:

$ lein new inventory

Now imagine we’re going to have a book inventory that looks like this:

[{:title "2001"   :author "Clarke" :copies 21}
 {:title "Emma"   :author "Austen" :copies 10}
 {:title "Misery" :author "King"   :copies 101}])

And we write some functions to do useful things with it:

test/inventory/src/inventory/core.clj

(ns inventory.core)

(defn find-by-title
  "Search for a book by title,
  where title is a string and books is a collection
  of book maps, each of which must have a :title entry"
  [title books]
  (some #(when (= (:title %) title) %) books))

(defn number-of-copies-of