Integration Testing w/ Sorcery

integration_spec.rb

describe "Shopping Cart Requests" do
  let!(:user) { Fabricate(:user) }

  before(:each) do
    login_user_post("admin", "admin")
  end

  context "when I visit the shopping cart" do
    it " show the logged in users' cart items " do
      #Test stuff
    end
  end
end

spec_helper.rb

RSpec.configure do |config|  
  config.include Sorcery::TestHelpers::Rails
end

module Sorcery
  module TestHelpers
    module Rails
      def login_user_post(user, password)
        page.driver.post(user_sessions_url, { username: user, password: password}) 
      end
    end
  end
end

user_fabricator.rb

Fabricator(:user, :class_name => "User") do
  id { sequence }
  username { "admin" }
  password { "admin" }
  display_name { "Admin Boom"}
  admin { true }
  email { "whatever@whatever.com" }
  salt { "asdasdastr4325234324sdfds" }
  crypted_password { Sorcery::CryptoProviders::BCrypt.encrypt("secret", 
                     "asdasdastr4325234324sdfds") }
end

This gist doesn't work for me either, I also either get ActionController::RoutingError:
No route matches [POST] "/login"

Or:
NameError:
undefined local variable or method `login_path'

Or:
NameError:
undefined local variable or method `page' for #<RSpec::ExampleGroups:

Did you guys ever figure this out?
I'm getting the undefined local variable or methodpage' for ...` issue

@anlek : same error here.