Javascript 关闭确认弹出窗口后出现模式对话框（Selenium:：WebDriver:：Error:：UnhandleAlerError）

我有一个这样的页面：

<input type="button" onclick="confirm('confirm popup');" value="click" />

确认弹出窗口出现。我可以这样说：

require "watir-webdriver/extensions/alerts"
browser.confirm(true) {browser.button(:value => 'Confirm').click}

但是我得到了这个错误信息：

[remote server] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/command_processor.js:10302:in `unknown': Modal dialog present (Selenium::WebDriver::Error::UnhandledAlertError)
    from [remote server] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/driver-component.js -> file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/dispatcher.js:85:in `unknown'
    from [remote server] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/driver-component.js -> file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/dispatcher.js:516:in `unknown'
    from [remote server] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/driver-component.js -> file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/dispatcher.js:351:in `unknown'
    from [remote server] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/driver-component.js -> file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/webdriverserver.js:47:in `unknown'
    from [remote server] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/httpd.js:1935:in `unknown'
    from [remote server] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/httpd.js:2261:in `unknown'
    from [remote server] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/httpd.js:1168:in `unknown'
    from [remote server] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/httpd.js:1616:in `unknown'
    from [remote server] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/httpd.js:1464:in `unknown'
    from [remote server] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/httpd.js:1333:in `unknown'
    from /Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/response.rb:52:in `assert_ok'
    from /Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/response.rb:15:in `initialize'
    from /Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/http/common.rb:59:in `new'
    from /Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/http/common.rb:59:in `create_response'
    from /Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/http/default.rb:64:in `request'
    from /Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/http/common.rb:40:in `call'
    from /Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/bridge.rb:590:in `raw_execute'
    from /Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/bridge.rb:568:in `execute'
    from /Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/bridge.rb:314:in `executeScript'
    from /Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/common/driver.rb:209:in `execute_script'
    from /Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/watir-webdriver-0.5.3/lib/watir-webdriver/browser.rb:129:in `execute_script'
    from /Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/watir-webdriver-0.5.3/lib/watir-webdriver/extensions/alerts.rb:39:in `confirm'
    from popup.rb:7:in `<main>'

[远程服务器]file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/command_processor.js:10302:“未知”：存在模式对话框（Selenium:：WebDriver:：Error:：UnhandleAlerError）
来自[远程服务器] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/driver-component.js->file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/dispatcher.js:85:in'unknown'
来自[远程服务器] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/driver-component.js->file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/dispatcher.js:516:in'unknown'
来自[远程服务器] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/driver-component.js->file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/dispatcher.js:351:in'unknown'
来自[远程服务器] file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/driver-component.js->file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/webdriverserver.js:47:in'unknown'
来自[远程服务器]file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/httpd.js:1935:in'unknown'
来自[远程服务器]file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/httpd.js:2261:in'unknown'
来自[远程服务器]file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/httpd.js:1168:in'unknown'
来自[远程服务器]file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/httpd.js:1616:in'unknown'
来自[远程服务器]file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/httpd.js:1464:in'unknown'
来自[远程服务器]file:///var/folders/yx/bz_81fc143b4r9pyhks300m00000gn/T/webdriver-profile20120218-1562-7b7q8d/extensions/fxdriver@googlecode.com/components/httpd.js:1333:in'unknown'
from/Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/response.rb:52:in'assert_ok'
来自/Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/response.rb:15:在“初始化”中
from/Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/http/common.rb:59:in“new”
from/Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/http/common.rb:59:in“create_response”
来自/Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/http/default.rb:64:在“请求”中
from/Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/http/common.rb:40:in'call'
from/Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/bridge.rb:590:in'raw_execute'
from/Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/bridge.rb:568:in'execute'
from/Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/remote/bridge.rb:314:in'executeScript'
来自/Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/selenium-webdriver-2.19.0/lib/selenium/webdriver/common/driver.rb:209:“执行脚本”中
from/Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/watir-webdriver-0.5.3/lib/watir-webdriver/browser.rb:129:in'execute_script'
from/Users/zeljko/.rvm/gems/ruby-1.9.3-p125/gems/watir-webdriver-0.5.3/lib/watir-webdriver/extensions/alerts.rb:39:在“确认”中
从弹出窗口。rb:7:in`'

我做错了什么

环境：

• Mac OS X 10.7.3
• 火狐10.0.2
• Ruby 1.9.3p125
• selenium webdriver 2.19.0
• watir webdriver 0.5.3

---

我会让您参考这个答案，在这里我解释了如何使用诸如browser.confirm之类的方法。这些示例有点混乱，因为它们直接来自测试，如果您不理解测试页面上有多个按钮的上下文，并且导致确认对话框的按钮的值为“confirm”，那么由该方法包装的“internal”命令就没有多大意义

confirm方法后面的循环（或块）中的命令是导致弹出的命令

因此，关于如何使用这些方法的更好例子应该是

alert_message_text = browser.confirm(true) do
  #watir code that causes confirm popup goes here
end 

或

换句话说，使用

.confirm（response）{block}

的工作方式非常类似于告诉watir“好的，我在块中给你的命令将导致出现一个确认对话框，当它出现时，我希望你采取

response

指定的操作。”

那么，你错在哪里是集团内部的命令

alert_message_text = browser.confirm(true) do
  #watir code that causes confirm popup goes here
end 

alert_message_text = browser.confirm(true) {#code that causes confirm popup}

require "watir-webdriver"
require "watir-webdriver/extensions/alerts"

browser = Watir::Browser.new
browser.goto "page.html"
browser.confirm(true) {browser.button(:value => 'click').click}

browser.confirm(true) {browser.button.click}