core-test.clj

(ns clojure-distance.test.core
  (:use [clojure.test])
  (:require clojure-distance.core)
  (:import [clojure-distance.core Miles]))

(deftest miles-to-miles
  (is
   (= (to-miles (Miles. 5)) 5)
   "Converting miles to miles returned a different length."))

(deftest miles-to-km
  (is
   (= (to-km (Miles. 1)) 1.609)
   "Converting miles to kilometers failed."))

core.clj

(ns clojure-distance.core)

(defprotocol Convertable
  (to-miles [this])
  (to-km [this]))

(defrecord Miles [length]
  Convertable
  (to-miles [this] :length)
  (to-km [this] (* :length 1.609)))

trace

C:\Users\XPherior\Desktop\clojure-distance>lein test
Exception in thread "main" java.lang.ClassNotFoundException: clojure-distance.core.Miles (core.clj:1)
        at clojure.lang.Compiler.eval(Compiler.java:5440)
        at clojure.lang.Compiler.eval(Compiler.java:5415)
        at clojure.lang.Compiler.load(Compiler.java:5857)
        at clojure.lang.RT.loadResourceScript(RT.java:340)
        at clojure.lang.RT.loadResourceScript(RT.java:331)
        at clojure.lang.RT.load(RT.java:409)
        at clojure.lang.RT.load(RT.java:381)
        at clojure.core$load$fn__4519.invoke(core.clj:4915)
        at clojure.core$load.doInvoke(core.clj:4914)
        at clojure.lang.RestFn.invoke(RestFn.java:408)
        at clojure.core$load_one.invoke(core.clj:4729)
        at clojure.core$load_lib.doInvoke(core.clj:4766)
        at clojure.lang.RestFn.applyTo(RestFn.java:142)
        at clojure.core$apply.invoke(core.clj:542)
        at clojure.core$load_libs.doInvoke(core.clj:4800)
        at clojure.lang.RestFn.applyTo(RestFn.java:137)
        at clojure.core$apply.invoke(core.clj:542)
        at clojure.core$require.doInvoke(core.clj:4881)
        at clojure.lang.RestFn.invoke(RestFn.java:421)
        at user$eval9.invoke(NO_SOURCE_FILE:1)
        at clojure.lang.Compiler.eval(Compiler.java:5424)
        at clojure.lang.Compiler.eval(Compiler.java:5414)
        at clojure.lang.Compiler.eval(Compiler.java:5415)
        at clojure.lang.Compiler.eval(Compiler.java:5391)
        at clojure.core$eval.invoke(core.clj:2382)
        at clojure.main$eval_opt.invoke(main.clj:235)
        at clojure.main$initialize.invoke(main.clj:254)
        at clojure.main$null_opt.invoke(main.clj:279)
        at clojure.main$main.doInvoke(main.clj:354)
        at clojure.lang.RestFn.invoke(RestFn.java:421)
        at clojure.lang.Var.invoke(Var.java:369)
        at clojure.lang.AFn.applyToHelper(AFn.java:163)
        at clojure.lang.Var.applyTo(Var.java:482)
        at clojure.main.main(main.java:37)
Caused by: java.lang.ClassNotFoundException: clojure-distance.core.Miles
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at clojure.lang.DynamicClassLoader.findClass(DynamicClassLoader.java:61)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Unknown Source)
        at clojure_distance.test.core$eval17$loading__4414__auto____18.invoke(core.clj:1)
        at clojure_distance.test.core$eval17.invoke(core.clj:1)
        at clojure.lang.Compiler.eval(Compiler.java:5424)
        ... 33 more