Standalone Capybara

capybara.rb

# config/initializers/capybara.rb

require 'capybara'
require 'capybara/dsl'
require 'selenium/webdriver'

# Use Chrome as the selenium test driver
Capybara.register_driver :headless_chrome do |app|
  capabilities = Selenium::WebDriver::Remote::Capabilities.chrome(
    chromeOptions: { args: %w(headless disable-gpu) }
  )

  Capybara::Selenium::Driver.new(
    app,
    browser: :chrome,
    desired_capabilities: capabilities
  )
end

Capybara.javascript_driver = :headless_chrome
Capybara.raise_server_errors = false
Capybara.run_server = false
Capybara.current_driver = :headless_chrome
Capybara.app_host = 'http://localhost'

Gemfile

gem 'capybara-selenium'
gem 'chromedriver-helper'

sample.rb

include Capybara::DSL

visit 'http://www.google.com'
search_box = find('[title="Search"]')
search_box.send_keys ['What is the meaning of life?', :return]
page.save_screenshot

# ...