Capybara minimal sample

Gemfile

source 'https://rubygems.org'

gem 'capybara'
gem 'poltergeist', require: 'capybara/poltergeist'

Gemfile.lock

GEM
  remote: https://rubygems.org/
  specs:
    capybara (2.4.3)
      mime-types (>= 1.16)
      nokogiri (>= 1.3.3)
      rack (>= 1.0.0)
      rack-test (>= 0.5.4)
      xpath (~> 2.0)
    cliver (0.3.2)
    mime-types (2.4.1)
    mini_portile (0.6.0)
    multi_json (1.10.1)
    nokogiri (1.6.3.1)
      mini_portile (= 0.6.0)
    poltergeist (1.5.1)
      capybara (~> 2.1)
      cliver (~> 0.3.1)
      multi_json (~> 1.0)
      websocket-driver (>= 0.2.0)
    rack (1.5.2)
    rack-test (0.6.2)
      rack (>= 1.0)
    websocket-driver (0.3.5)
    xpath (2.0.0)
      nokogiri (~> 1.3)

PLATFORMS
  ruby

DEPENDENCIES
  capybara
  poltergeist

sample.rb

require 'bundler'
Bundler.require

Capybara.run_server = false
Capybara.current_driver = :poltergeist

include Capybara::DSL

Capybara.app_host = 'http://www.yahoo.co.jp'

visit '/'

fill_in :srchtxt, with: 'hoge'
click_on :srchbtn

p all('a').map {|e| e[:href] }