module LoginDialog  

  def ua_link
    @dr.find_element(:id,'ua').find_elements(:css,'a')
  end  

  def login_link
    ua_link[1]
  end  

  def to_dialog_frame
    begin
      @dr.switch_to.frame('login_frame')
    rescue
      raise 'Can not switch to login dialog, make sure the dialog was open'
      exit
    end
  end  

  def usr_field
    @dr.find_element(:id => 'u')
  end  

  def psd_field
    @dr.find_element(:id => 'p')
  end  

  def login_btn
    @dr.find_element(:id => 'login_button')
  end  

  def err_message
   @dr.find_element(:id=>'err_m').text
  end  

  def close_browser
    @dr.close
  end
end

require File.dirname(__FILE__)+'/../tool/login_dialog'
class LoginMainPage
  include LoginDialog
  def initialize(dr)
    @dr ||=dr
  end  

  def open_login_dialog
    login_link.click
    login_link.send_keys(:enter)
    sleep 2
  end  

  def login(username,password)
    open_login_dialog
    to_dialog_frame
    usr_field.send_keys(username)
    psd_field.send_keys(password)
    login_btn.click
  end
end

#encoding: utf-8
require "rspec"
require 'yaml'
require 'selenium-webdriver'  

require File.dirname(__FILE__)+'/../action/login_main_page'
require File.dirname(__FILE__)+'/../tool/login_dialog'  

describe "soso login" do
  include LoginDialog
  before(:all) do
    @dr=Selenium::WebDriver.for :firefox
    @url='http://www.soso.com'
    @dr.get @url
  end
  before(:each) do  

    @login_element=LoginMainPage.new(@dr)
  end  

  it "should return username and password is wrong" do
    begin
      @login_element.login("test","test")
      err_message.should eql ("您输入的帐号或密码不正确，请重新输入。意见反馈")
    ensure
      close_browser
    end
  end
end 

soso login
  should return username and password is wrong  

Finished in 8.3 seconds
1 example, 0 failures