Finish sentences using Google autocomplete!

autocompleter.rb

require 'capybara'
require 'forwardable'

class GoogleCompleter
  extend Forwardable

  attr_accessor :session
  def_delegator :session, :evaluate_script, :js

  def initialize
    @session = Capybara::Session.new(:selenium)
    @session.visit("https://www.google.com")
  end

  def complete(fragment)
    session.fill_in "q", with: fragment
    sleep 0.3

    results = js <<-EOJS
      (function () {
        var els = document.querySelectorAll("[role='listbox'] [role='option'] b:last-child");
        return Array.prototype.map.call(els, function (el) {
          return el.innerHTML.replace(/^\s+/, "");
        });
      }())
    EOJS
  end

  def quit
    session.driver.browser.quit
  end
end