devise_steps.rb

When /^Facebook returns (.*)$/ do |returns|
  Devise::OmniAuth.short_circuit_authorizers!

  Devise::OmniAuth.stub!(:facebook) do |b|
    access_token = {
      :access_token => "plataformatec"
    }

    b.post('/oauth/access_token') { [200, {}, access_token.to_json] }

    facebook = {
      :id => '12345',
      :link => 'http://facebook.com/user_example',
      :email => 'user@example.com',
      :first_name => 'User',
      :last_name => 'Example',
      :website => 'http://blog.plataformatec.com.br'
    }

    b.get('https://graph.facebook.com/oauth/authorize?client_id=121291144597463&redirect_uri=http%3A%2F%2Fwww.example.com%2Fusers%2Fauth%2Ffacebook%2Fcallback&scope=email%2Coffline_access&type=web_server') { [200, {}, facebook.to_json] }
  end

  visit '/users/auth/facebook'

  # hash = {}
  # returns.split(/,\s+/).each do |part|
  #   if part =~ /([a-z_]+):"([a-zA-Z0-9 \@\.]+)"/
  #     hash[$1.to_sym] = $2
  #   else
  #     raise "Could not match Facebook #{part}"
  #   end
  # end
  # hash

  #Devise::OmniAuth.unshort_circuit_authorizers!

  #Devise::OmniAuth.reset_stubs!
end

env.rb

Devise::OmniAuth.test_mode!

facebook.feature

Feature: Facebook Connect

  Scenario: Sign in with Facebook
    When I go to the sign in page
    And I press "Sign in with Facebook"
    And Facebook returns uid:"123", nickname:"chunky.bacon", first_name:"Chunky", last_name:"Bacon", email:"bacon@mysite.co.nz"
    Then I should see "Your mysite account was successfully created"