未定义水豚的“set_cookie”方法如何创建cookie?

我在和一个公共场所赛跑

当我试着 set_cookie 我得到:

undefined method 'set_cookie' for #<Selenium::WebDriver::Driver:0x531e792e4b07692c browser=:chrome>

require 'rspec'
require 'capybara'
require 'capybara/rspec'
require 'capybara/dsl'
require 'pry'

Capybara.run_server = false
Capybara.app_host = 'http://www.google.com/'

Capybara.register_driver :chrome do |app|
  Capybara::Selenium::Driver.new(app, :browser => :chrome)
end

root='/'

describe 'Form flow works', :type => :feature do

  before :each do
    Capybara.current_driver = :chrome
  end 

  it 'Collect the customer data', :happy do
    visit( root )
    page.driver.browser.set_cookie('test_disabled', 'true', :domain => 'www.google.com')

实际的url不是google。

我试过了 show_me_cookies 但那没用-细节:
$ gem install show_me_the_cookies Successfully installed show_me_the_cookies-4.0.0 Parsing documentation for show_me_the_cookies-4.0.0 Done installing documentation for show_me_the_cookies after 0 seconds 1 gem installed

我在规范中添加了以下代码(现在只使用一个包含所有代码的文件)

RSpec.configure do |c| 
  c.treat_symbols_as_metadata_keys_with_true_values = true
  c.include ShowMeTheCookies, :type => :feature
end

然后我在我的规范中添加了show_me_the_cookies,但我得到的只是 ...spec/foo_spec.rb:17:in 阻止:未初始化的常量ShowMeTheCookies(NameError)`