Poltergeist

Poltergeist es un driver para Capybara.

Nos permite ejecutar pruebas Capybara con un navegador WebKit ^18.1headless, basado en PhantomJS.

Es posible ejectuar las pruebas del ejemplo anterior usando PhantomJS via Poltergeist cambiando el fichero features/support/env.rb:

[~/sinatra/sinatra-capybara/youtube(poltergeist)]$ cat features/support/env.rb 
require 'capybara/cucumber'
require 'capybara/poltergeist'

#Capybara.default_driver = :selenium
Capybara.register_driver :poltergeist do |app|
  Capybara::Poltergeist::Driver.new(app, :js_errors => false)
end
Capybara.default_driver = :poltergeist
#Capybara.javascript_driver = :webkit

Es necesario poner el atributo :js_errors => false para evitar que los errores que se producen en JavaScript se propagen al código Ruby y causen que las pruebas se detengan.

Sigue una ejecución:

[~/sinatra/sinatra-capybara/youtube(poltergeist)]$ rake
cucumber
Feature: Search for Videos on YouTube

  Scenario: Search for Videos of Large Rodents # features/youtube_search.feature:3
Refused to display document because display forbidden by X-Frame-Options.

    Given I am on the YouTube home page        # features/step_defs/steps.rb:1
Unsafe JavaScript attempt to access frame with URL about:blank from frame with URL file:///Users/casiano/.rvm/gems/ruby-2.1.2/gems/poltergeist-1.5.1/lib/capybara/poltergeist/client/compiled/main.js. Domains, protocols and ports must match.

    When I search for "capybara"               # features/step_defs/steps.rb:5
    Then videos of large rodents are returned  # features/step_defs/steps.rb:10
      #<Capybara::Session>

1 scenario (1 passed)
3 steps (3 passed)
0m6.230s