Use midje for testing

project.clj

@@ -8,4 +8,8 @@
   :java-source-paths ["src/java"]
   :main ^:skip-aot book.core
   :target-path "target/%s"
-  :profiles {:uberjar {:aot :all}})
+  :plugins [[lein-midje "3.2.1"]]
+  :profiles {
+             :uberjar {:aot :all}
+             :dev {:dependencies [[midje "1.9.1"]]}})
+