How to get tests running on an external site that uses HTTP authentication

example_spec.rb

# /spec/example_spec.rb
require 'rspec'
require 'capybara'
require 'capybara/dsl'
require 'capybara-webkit'
require_relative '../spec_helper.rb'

Capybara.app_host = "http://username:password@dev01.example.com"

describe "The homepage", :js => true do
  before :all do
    Capybara.current_driver = :webkit
  end
  
  it "has header links" do
    # puts Capybara.current_driver
    visit "/"
    page.should have_content "Some Text"
    page.should have_content "Other Text"
  end
  
  it "allows you to sign up for emails" do
    click_link "signup"
    find('#emailsignupcontainer').should be_visible
    
    fill_in 'elementId', :with => 'bob'
    fill_in 'elementId', :with => '123@example.com'
    click_link 'Sign Up'
    page.should have_content "Thank you for signing up!"
  end
end

Gemfile

# /Gemfile
source 'http://rubygems.org'

gem 'rspec'
gem 'capybara'
gem 'selenium-webdriver'
gem 'capybara-webkit'