执行脚本后出现错误“`': uninitialized constant Selenium::Webdriver”
这是我的代码
require 'rubygems'
require 'selenium-webdriver'
require 'test/unit'
class TC_Login < Test::Unit::TestCase
@driver = Selenium::Webdriver.for :firefox
@driver.get "http:test.com"
def test_01
login()
end
def login()
content
end