Sample Capybara file for use with cucumber/selenium/poltergeist.

capybara.rb

require 'capybara'
require 'capybara/cucumber'
require 'selenium-webdriver'
require 'capybara/poltergeist'
require 'open-uri'
require 'pry'
require 'pathname'


if ENV['SELENIUM']
  Capybara.default_wait_time = 10
  Capybara.default_driver = :selenium
  Capybara.register_driver :selenium do |app|
    prefs = {
      'download' => {
        'default_directory' => DownloadHelpers.path.to_s,
        'directory_upgrade' => true,
        'extensions_to_open' => ''
      }
    }
    caps = Selenium::WebDriver::Remote::Capabilities.chrome
    caps['chromeOptions'] = {'prefs' => prefs}
    Capybara::Selenium::Driver.new(app,
                                  :browser => :chrome,
                                  :desired_capabilities => caps,
                                  :args => ["--window-size=1920,1080"]
    )
  end

  if ENV['APPHOST']
    # Specify a remote host.  Format:
    #   APPHOST="http://192.168.1.0:3000"
    Capybara.run_server = false
    Capybara.app_host = "#{ENV['APPHOST']}"
  else
    # Remove the next line when Capybara can successfully start server
    Capybara.run_server = false
    Capybara.app_host = 'http://localhost:3000'
  end

  # Check to see if the server is running (for Selenium tests only)
  if Capybara.default_driver == :selenium && !Capybara.run_server
    begin
      open(Capybara.app_host)
    rescue
      puts "\nCannot connect to server #{Capybara.app_host}\n\n"
      exit
    end
  end

else
  # Poltergeist -- the default
  Capybara.register_driver :poltergeist do |app|
    Capybara::Poltergeist::Driver.new(
      app,
      {
        debug: false, # change this to true to troubleshoot
        window_size: [1920, 1040] # this can affect dynamic layout
      }
    )
  end
  Capybara.javascript_driver = :poltergeist
  Capybara.default_driver = :poltergeist

  Capybara.server do |app, port|
    require 'rack/handler/thin'
    Thin::Logging.silent = true
    Thin::Server.new('0.0.0.0', port, app).start
  end
end