Stubbing local scope methods from outside a module so you can test methods inside a module

gistfile1.rb

require 'minitest_helper'
require 'helpers/application_helper'

describe ApplicationHelper do

  before :all do
    @helper = Struct.new(:request).new #Create an empty request method so it can be stubbed
    @helper.extend(ApplicationHelper)
  end

  describe "nav links" do
    before :all do
      @request = MiniTest::Mock.new
      @request.expect :path_info, '/'
    end

    it "should return a link to a path" do
      @helper.stub :request, @request do
        @helper.nav_link_to('test','/test').must_equal '<a href="/test">test</a>'
      end
    end
  
    it "should return an anchor link to the current path with class 'current'" do
      @helper.stub :request, @request do
        @helper.nav_link_to('test','/').must_equal '<a href="/" class="current">test</a>'
      end
    end
  end
end