Stubbing controller_name & action_name in Rails 3 with rspec 2.5

application_helper.rb

module ApplicationHelper
  
  def foo
    controller_name == 'widgets' && action_name == 'index'
  end

end

application_helper_spec.rb

require 'spec_helper'

describe ApplicationHelper do

  describe '#foo' do
    context "on Widgets#index" do
      it "returns true" do
        controller.stub(:controller_name).and_return('widgets')
        controller.stub(:action_name).and_return('index')
        helper.foo.should be_true
      end
    end

    context "not on Widgets#index" do
      it "returns false" do
        controller.stub(:controller_name).and_return('widgets')
        controller.stub(:action_name).and_return('show')
        helper.foo.should be_false
      end
    end
  end

end

Worked for me when above did not - a rails 6, rspec 3.9 - in spec/helpers/my_helper_spec.rb

before do
  allow(controller).to receive(:controller_name).and_return 'Widgets'
  allow(controller).to receive(:action_name).and_return 'show'
end