How to activate test-unit for RubyMine when developing a library (gem)?

Question

I'm developing a library (a gem) using Ruby 1.9.2. My Gemspec looks like the usual for a gem:

source "http://rubygems.org"

# Specify your gem's dependencies in table_builder.gemspec
gemspec

while in my gemspec I have this line:

s.add_development_dependency "test-unit"

I can see it's being installed and my Gemfile.lock includes it:

PATH
  remote: .
  specs:
    foobar (0.0.1)

GEM
  remote: http://rubygems.org/
  specs:
    test-unit (2.4.5)

PLATFORMS
  ruby

DEPENDENCIES
  foobar!
  test-unit

In my Rakefile I load it with:

require "rubygems"
require "test/unit"

as well as in my test_helper.rb:

require "rubygems"
require "test/unit"

In the command line the tests run and pass, but in RubyMine, whether I run tests or the test rake task, I get this message:

MiniTest framework was detected. It is a limited version of original Test::Unit framework. RubyMine/IDEA Ruby plugin test runner requires full-featured version of the framework, otherwise default console tests reporter will be used instead. Please install 'test-unit' gem and activate it on runtime.

I'm using RVM, so I checked the SDK is the one I'm using on the command line and test-unit is listed in the list of installed gems.

So, how I activate test-unit in a way that RubyMine likes?

Answer 1

RubyMine 4.0 (in RC2 at the time of this writing) supports minitest and managed to run the tests out of the box. Way to go JetBrains!

Answer 2

Please refer to help. You need Gemfile with the used gems listed in it for RubyMine to recognize the dependencies.