Question

I am writing a small Clojure project using leiningen with the following directory structure:

project
+ src
  + org/example/project/core.clj
+ test
  + org/example/project/core.clj

When I run lein test, it reports that it ran 0 tests with 0 failures, but I purposely put a test designed to fail in the test/…/core.clj file.

I added the line :test-path test to my project.clj file and when I re-ran, got the error:

Exception in thread "main" java.lang.IllegalArgumentException: No implementation of method: :as-file of protocol: #'clojure.java.io/Coercions found for class: clojure.lang.Symbol (NO_SOURCE_FILE:0)
    at clojure.lang.Compiler.eval(Compiler.java:5440)
    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$initialize.invoke(main.clj:254)
    at clojure.main$script_opt.invoke(main.clj:270)
    at clojure.main$main.doInvoke(main.clj:354)
    at clojure.lang.RestFn.invoke(RestFn.java:458)
    at clojure.lang.Var.invoke(Var.java:377)
    at clojure.lang.AFn.applyToHelper(AFn.java:174)
    at clojure.lang.Var.applyTo(Var.java:482)
    at clojure.main.main(main.java:37)
Caused by: java.lang.IllegalArgumentException: No implementation of method: :as-file of protocol: #'clojure.java.io/Coercions found for class: clojure.lang.Symbol
    at clojure.core$_cache_protocol_fn.invoke(core_deftype.clj:471)
    at clojure.java.io$fn__7328$G__7323__7333.invoke(io.clj:34)
    at clojure.java.io$file.invoke(io.clj:401)
    at leiningen.util.ns$namespaces_in_dir.invoke(ns.clj:38)
    at leiningen.test$test.doInvoke(test.clj:45)
    at clojure.lang.RestFn.invoke(RestFn.java:411)
    at clojure.lang.Var.invoke(Var.java:365)
    at clojure.lang.AFn.applyToHelper(AFn.java:163)
    at clojure.lang.Var.applyTo(Var.java:482)
    at clojure.core$apply.invoke(core.clj:542)
    at leiningen.core$apply_task.invoke(core.clj:156)
    at leiningen.core$_main.doInvoke(core.clj:212)
    at clojure.lang.RestFn.applyTo(RestFn.java:138)
    at clojure.core$apply.invoke(core.clj:540)
    at leiningen.core$_main.invoke(core.clj:217)
    at user$eval167.invoke(NO_SOURCE_FILE:1)
    at clojure.lang.Compiler.eval(Compiler.java:5424)
    ... 11 more

I am running Clojure 1.2 and the latest lein (1.3.1).

Looks like a problem with either clojure.core or the lein code.

Answer 1

As for the source layout. I think you basically shadow your test with the real core.clj file. That’s probably why clojure.test doesn’t find any tests. Did you try a different namespace and file name? eg. test/example/project/test_core.clj.