using a wrapper to stub

wrap_require.rb

class Wrapper
  def self.some_windows_dependent_stuff
    require "win32/registry"
    # use windows stuff
  end
end

class Subject
  def where_i_need_it
    Wrapper.some_windows_dependent_stuff
  end
end

describe Subject do

  it "puts the lotion on its skin" do
    Wrapper.stub(:some_windows_dependent_stuff) { :foo }
    Subject.new.where_i_need_it.should eql(:foo)
  end

end

I ended up just hacking around it for now. It's ugly, but...

begin require 'win32ole'
rescue LoadError # FUCKING HACKY! Must be on UNIX, just fake it.
  module ::WIN32OLE; end
end