Selenium Webdriver无法创建chrome webdriver实例

Question

我们已经成功地在chrome和firefox上使用Selenium对Rails2进行了集成测试。然而，我们最近升级到了Rails3，在创建chrome webdriver实例时遇到了问题。

当我们尝试创建时，我们得到以下堆栈：

irb(main):002:0> profile = Selenium::WebDriver::Chrome::Profile.new
translate])#<Selenium::WebDriver::Chrome::Profile:0x64f2fd0 @extensions=[], @model=nil>
irb(main):003:0> profile['download.prompt_for_download'] = false
false
irb(main):004:0> driver = Selenium::WebDriver.for(:chrome, :profile  => profile,     :switches => %w[--ignore-certificate-errors --disable-popup-blocking --disable-translate])
ArgumentError: wrong number of arguments (0 for 1)
  from /var/www/myapp/shared/bundle/ruby/1.8/gems/selenium-webdriver-2.27.2/lib/selenium/webdriver/common/platform.rb:157:in `open'
  from /var/www/myapp/shared/bundle/ruby/1.8/gems/selenium-webdriver-2.27.2/lib/selenium/webdriver/common/platform.rb:157:in `ip'
    from /var/www/myapp/shared/bundle/ruby/1.8/gems/selenium-webdriver-2.27.2/lib/selenium/webdriver/common/platform.rb:170:in `interfaces'
    from /var/www/myapp/shared/bundle/ruby/1.8/gems/selenium-webdriver-2.27.2/lib/selenium/webdriver/common/port_prober.rb:23:in `free?'
    from /var/www/myapp/shared/bundle/ruby/1.8/gems/selenium-webdriver-2.27.2/lib/selenium/webdriver/common/port_prober.rb:5:in `above'
    from /var/www/myapp/shared/bundle/ruby/1.8/gems/selenium-webdriver-2.27.2/lib/selenium/webdriver/chrome/service.rb:33:in `default_service'
    from /var/www/myapp/shared/bundle/ruby/1.8/gems/selenium-webdriver-2.27.2/lib/selenium/webdriver/chrome/bridge.rb:14:in `initialize'
    from /var/www/myapp/shared/bundle/ruby/1.8/gems/selenium-webdriver-2.27.2/lib/selenium/webdriver/common/driver.rb:37:in `new'
    from /var/www/myapp/shared/bundle/ruby/1.8/gems/selenium-webdriver-2.27.2/lib/selenium/webdriver/common/driver.rb:37:in `for'
    from /var/www/myapp/shared/bundle/ruby/1.8/gems/selenium-webdriver-2.27.2/lib/selenium/webdriver.rb:67:in `for'
    from (irb):4

有什么建议吗？

Answer 1

当我将"backports“gem作为依赖项的一部分包含到我的Gemfile中时，我看到了这一点。backports gem重写了一些Ruby1.8内部机制，从而覆盖了UDPSocket核心类的一部分。试着摆脱后端的宝石，并给它一个机会。

Answer 2

ChromeDriver安装：

从“http://chromedriver.storage.googleapis.com/index.html?path=2.8/”下载Chromedriver 2.x。解压并保存在任意驱动器上的文件夹中。通过以下步骤设置路径：

复制路径，直到chromedriver.exe在计算机上右击并选择‘属性’选择‘高级系统变量’选择‘环境变量’单击‘用户变量’的‘path’变量的编辑按钮追加chromedriver路径保存更改。

运行Selenium测试:

现在运行您的selenium测试。它将在chrome浏览器上运行。

示例代码

需要“selenium-webdriver”

$driver = Selenium::WebDriver.for :chrome

$driver.navigate.to "https://www.google.co.in/“

$driver.manage().window().maximize()

$driver.quit()

备注：您需要为最新版本的Chrome浏览器安装最新的chromedriver

Answer 3

这是由于与backports gem的冲突以及socket库重用IO.open这一事实造成的，尽管它更改了接口。

将backports升级到v2.6.7 or above应该可以解决这个问题。