ruby - Selenium Webdriver 无法创建 chrome webdriver 实例

Question

我们一直在 chrome 和 firefox 上使用 Selenium 针对 Rails 2 成功运行集成测试。但是，我们最近升级到 Rails 3，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

当我将一个包含“向后移植”gem 作为其依赖项的一部分的 gem 包含到我的 Gemfile 中时，我看到了这一点。 backports gem 重写了一些 Ruby 1.8 内部结构，它覆盖了部分 UDPSocket 核心类。尝试摆脱 backports gem 并试一试。