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我正在尝试在 Ubuntu 10.04 上为 Ruby 运行 Watir。我已经在我的（无显示）服务器上安装了 Chrome 和 ChromeDriver，并安装了 selenium-webdriver Gem。但是当我尝试在 Watir 中创建浏览器时，我得到：

$ irb
irb(main):001:0> require 'rubygems'
=> true
irb(main):002:0> require 'watir-webdriver'
=> true
irb(main):003:0> browser = Watir::Browser.new :chrome
NoMethodError: undefined method `closed?' for nil:NilClass
        from /usr/lib/ruby/1.8/net/http.rb:1060:in `request'
        from /usr/lib/ruby/gems/1.8/gems/selenium-webdriver-2.26.0/lib/selenium/webdriver/remote/http/default.rb:83:in `response_for'
        from /usr/lib/ruby/gems/1.8/gems/selenium-webdriver-2.26.0/lib/selenium/webdriver/remote/http/default.rb:39:in `request'
        from /usr/lib/ruby/gems/1.8/gems/selenium-webdriver-2.26.0/lib/selenium/webdriver/remote/http/common.rb:40:in `call'
        from /usr/lib/ruby/gems/1.8/gems/selenium-webdriver-2.26.0/lib/selenium/webdriver/remote/bridge.rb:598:in `raw_execute'
        from /usr/lib/ruby/gems/1.8/gems/selenium-webdriver-2.26.0/lib/selenium/webdriver/remote/bridge.rb:92:in `create_session'
        from /usr/lib/ruby/gems/1.8/gems/selenium-webdriver-2.26.0/lib/selenium/webdriver/remote/bridge.rb:68:in `initialize'
        from /usr/lib/ruby/gems/1.8/gems/selenium-webdriver-2.26.0/lib/selenium/webdriver/chrome/bridge.rb:29:in `initialize'
        from /usr/lib/ruby/gems/1.8/gems/selenium-webdriver-2.26.0/lib/selenium/webdriver/common/driver.rb:37:in `new'
        from /usr/lib/ruby/gems/1.8/gems/selenium-webdriver-2.26.0/lib/selenium/webdriver/common/driver.rb:37:in `for'
        from /usr/lib/ruby/gems/1.8/gems/selenium-webdriver-2.26.0/lib/selenium/webdriver.rb:65:in `for'
        from /usr/lib/ruby/gems/1.8/gems/watir-webdriver-0.5.5/lib/watir-webdriver/browser.rb:35:in `initialize'
        from (irb):3:in `new'
        from (irb):3
        from :0
irb(main):004:0>

在“Watir::Browser.new”调用后长时间停顿，我假设某种超时？也许试图与 Chromedriver 交谈？我正在运行相关 Gems 的这些版本：

$ gem list

*** LOCAL GEMS ***

addressable (2.3.2)
childprocess (0.3.6)
fastercsv (1.5.5)
ffi (1.2.0, 1.0.11)
libwebsocket (0.1.3)
multi_json (1.3.7, 1.0.4)
rubygems-update (1.8.24)
rubyzip (0.9.9)
selenium-webdriver (2.26.0, 2.18.0)
watir-webdriver (0.5.5)
websocket (1.0.3)
yajl-ruby (1.1.0)
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1 回答 1

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我正在尝试无头运行 Chrome，但我没有运行 X 服务器。Xvfb 成功了，我现在正在工作：

http://en.wikipedia.org/wiki/Xvfb

http://blog.kagesenshi.org/2007/06/running-x-applications-headless-using.html

于 2012-11-20T23:47:03.003 回答