JRuby / Clojure interop

ClojureFromRuby.rb

#lein new app x
#cd x

#:aot :all in project.clj
#lein compile

#env CLASSPATH=$(lein classpath) jirb -rjava -w -d

java_import "clojure.java.api.Clojure"
Java::ClojureJavaApi::Clojure.var("clojure.core", "+").invoke(2,3,4)

c = Java::ClojureJavaApi::Clojure
r = c.var("clojure.core", "require")
r.invoke(c.read("x.core"))
c.var("x.core", "-main").invoke()

Hello, World!

RubyFromClojure.clj

(ns jruby-example.core-test
  (:require [clojure.test :refer :all]
            [zweikopf.core :as z]))

(z/init-ruby-context)
(z/ruby-require "rspec")
(z/ruby-require "bundler")
(z/call-ruby (z/ruby-eval "Bundler") :require)

(deftest z-test
  (is (= 3 (z/ruby-eval "1 + 2"))))

(deftest rspec-test
  (let [stderr (z/ruby-eval "STDERR")
        stdout (z/ruby-eval "STDOUT")]
    (is (zero? (-> "RSpec::Core::Runner" z/ruby-eval (z/call-ruby :run (z/rubyize ["spec"]) stderr stdout))))))