Simplest possible JRuby+Java test

Bar.java

package org.foo;

public class Bar {
  public static int baz() {
    return 1;
  }
}

bar_spec.rb

#!/usr/bin/env jruby

require "minitest/autorun"

describe org.foo.Bar do
  describe "baz" do
    it "must return 1" do
      org.foo.Bar.baz.must_equal 1
    end
  end
end

As an example of the above mention of direct execution, you can:

1. Clone this project: https://github.com/sam/blog
2. ./install-dependencies
3. bundle install
4. test/watch.rb

Which is basically the setup I mention above, except using Maven instead of Ant to compile. (Only because I assume using a non-Maven source tree structure, and custom build-dir would be a little simpler with Ant?)