1

我的系统配置为 Windows 7、IE8，当我尝试打开 firefox 浏览器时出现以下错误，谁能帮我解决这些问题。

C:\Users\khan>irb

irb(main):001:0> require 'rubygems'
=> true

irb(main):002:0> require 'watir-webdriver'
=> true

irb(main):003:0> e=Watir::Browser.new :firefox
NoMethodError: undefined method `ascii_only?' for {}:Hash
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/json_pure-1.4.3/lib/json/pure/generator.rb:393:in `to_json'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/multi_json-1.3.7/lib/multi_json/adapters/json_common.rb:11:in `dump'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/multi_json-1.3.7/lib/multi_json.rb:115:in `dump'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/common/json_helper.rb:23:in `json_dump'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/firefox/profile.rb:254:in `write_prefs'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/firefox/profile.rb:253:in `each'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/firefox/profile.rb:253:in `write_prefs'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/firefox/profile.rb:252:in `open'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/firefox/profile.rb:252:in `write_prefs'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/firefox/profile.rb:232:in `update_user_prefs_in'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/firefox/profile.rb:79:in `layout_on_disk'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/firefox/launcher.rb:58:in `create_profile'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/firefox/launcher.rb:34:in `launch'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/firefox/socket_lock.rb:20:in `locked'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/firefox/launcher.rb:32:in `launch'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/firefox/bridge.rb:20:in `initialize'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/common/driver.rb:31:in `new'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/common/driver.rb:31:in `for'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver.rb:67:in `for'
    from D:/Ruby_1.8.7/lib/ruby/gems/1.8/gems/watir-webdriver-0.6.2/lib/watir-webdriver/browser.rb:46:in `initialize'
    from (irb):3:in `new'
    from (irb):3
    from ♥:0irb(main):004:0>
4

2 回答 2

3

根据例外情况，您使用的是旧版本的 selenium-webdriver 和 watir-webdriver。您的 selenium-webdriver gem 和您的 Firefox 版本之间可能存在不兼容。

因此，我建议升级您的宝石：

gem install selenium-webdriver
gem install watir-webdriver

也有可能依赖项之一也不兼容（例如，发生异常的 json-pure ）。您可能想尝试更新所有内容。

gem update
于 2013-10-07T16:31:20.487 回答
1

您应该尝试更新 gem，我不确定，但尝试一次。

gem update --system
于 2013-10-08T10:03:37.667 回答