$ cat google.rb
require 'rubygems'
require 'watir'
require 'firewatir'

browser = Watir::Browser.new
browser.goto 'http://google.com'
browser.text_field(:name, 'q').set 'Ruby'
browser.button(:name, 'btnG').click
if browser.text.include? 'Ruby Programming Language'
  puts 'Text was found'
else
  puts 'Text was not found'
end
				
				

run test

				
$ irb google.rb

google.rb(main):001:0> require 'rubygems'
=> true
google.rb(main):002:0> require 'watir'
=> true
google.rb(main):003:0> require 'firewatir'
=> true
google.rb(main):004:0>
google.rb(main):005:0* browser = Watir::Browser.new
=> #<FireWatir::Firefox:0x7f797dd2b880 url="http://www.google.com.hk/search?hl=zh-CN&source=hp&biw=1440&bih=660&q=Ruby&btnG=Google+%E6%90%9C%E7%B4%A2&aq=f&aqi=g10&aql=&oq=" title="Ruby - Google \346\220\234\347\264\242">
google.rb(main):006:0> browser.goto 'http://google.com'
=> #<FireWatir::Firefox:0x7f797dd2b880 url="http://www.google.com.hk/" title="Google">
google.rb(main):007:0> browser.text_field(:name, 'q').set 'Ruby'
=> 0
google.rb(main):008:0> browser.button(:name, 'btnG').click
=> 0
google.rb(main):009:0> if browser.text.include? 'Ruby Programming Language'
google.rb(main):010:1>   puts 'Text was found'
google.rb(main):011:1> else
google.rb(main):012:1*   puts 'Text was not found'
google.rb(main):013:1> end
Text was found
=> nil
				
				

require 'watir-webdriver'

browser = Watir::Browser.new
browser.goto 'http://www.google.com.hk'
browser.text_field(:name => 'q').set 'netkiller'
browser.button(:name => 'btnK').click

if browser.text.include? 'Neo'
  puts 'Text was found'
else
  puts 'Text was not found'
end
browser.close()
				

require 'watir-webdriver'

browser = Watir::Browser.new :remote, :url => "http://192.168.2.44:4444/wd/hub", :desired_capabilities => Selenium::WebDriver::Remote::Capabilities.chrome

browser.goto 'http://www.google.com.hk'
browser.text_field(:name => 'q').set 'netkiller'
browser.button(:name => 'btnK').click

if browser.text.include? 'Neo'
  puts 'Text was found'
else
  puts 'Text was not found'
end
browser.close()