Capybara and Cucumber: Handling iframe, Pop-ups and Facebook Login

facebook_login.feature

Feature: Facebook Login
  As An anonymous user
  I Want to login the webpage
  So That I can buy anything

   Background: Member should open home page
      Given I go to home page

      @javascript
      Scenario: Member should be able to login with Facebook
        When member login with Facebook
        Then member should see popup window closes
        And member see member informations

facebook_login.rb

When(/^member login with Facebook$/) do
  # set the main window
  main = page.driver.browser.window_handles.first
  
  # to enable to click Facebook login button we must switch to Facebook iframe
  facebok_iframe_name = find(:xpath, "//*[@id='fb-button-explore']/span/iframe")[:name]
  page.driver.browser.switch_to.frame facebok_iframe_name 
  
  # now we can click the Facebook login button which open the pop-up
  find(:id, "u_0_1").click()

  # to enable to fill the Facebook creditional set popup windows 
  # and then switch to popup window
  popup = page.driver.browser.window_handles.last
  page.driver.browser.switch_to.window(popup)

  # fill form and click login button
  fill_in("email", :with => "mesut@testrisk.com")
  fill_in("pass", :with => "Password123")
  find(:id, "u_0_1").click()

  # don't forget to switch to main window
  page.driver.browser.switch_to.window(main)

end

Thank you, you saved my day