我正在使用Selenium WebDriver和Ruby，我需要自动化文件上传功能。 我试过
WAIT.until { driver.find_element(:css,'div.ui-dialog-buttonset').displayed? }
使用它会产生超时错误
elem = driver.find_element(:css,'div.ui-dialog-buttonset')
puts "Hi"
js = <<-end
var buttons = document.querySelectorAll('button');
buttons[0].setAttribute('aria-disabled', true);
end
elem = driver.execute_script(js, elem)
puts elem
elem.send_keys("C:\\Users\\seema\\Desktop\\1413.jpg")
以上代码无效，脚本因错误
而失败这是HTML代码
<div class="ui-dialog-buttonpane ui-widget-content ui-helper-clearfix">
<div class="ui-dialog-buttonset">
<button class="otherButtonClass ui-state-hover ui-state-focus" type="button" role="button" aria-disabled="false">
<button class="otherButtonClass" type="button" role="button" aria-disabled="false" style="display: none;">
<button class="cancelButtonClass" type="button" role="button" aria-disabled="false">
</div>
</div>
这里是错误堆栈
,"message":"error - undefined me
thod `send_keys' for nil:NilClass \n [\"tests/upload_branding.rb:38:in `create_publish_pla
yer'\", \"tests/upload_branding.rb:80:in `PublishPlayerTest'\", \"org/jruby/RubyBasicObjec
t.java:1703:in `__send__'\", \"c:/jruby-1.7.4/lib/ruby/gems/shared/gems/minitest-4.7.4/lib
/minitest/unit.rb:1258:in `run'\", \"c:/jruby-1.7.4/lib/ruby/gems/shared/gems/minitest-rep
orters-0.14.20/lib/minitest/reporters.rb:62:in `run_with_hooks'\", \"c:/jruby-1.7.4/lib/ru
by/gems/shared/gems/scope-0.2.4/lib/scope.rb:105:in `run'\", \"org/jruby/RubyProc.java:255
:in `call'\", \"c:/jruby-1.7.4/lib/ruby/gems/shared/gems/scope-0.2.4/lib/scope.rb:153:in `
recursively_run_setup_and_teardown'\", \"c:/jruby-1.7.4/lib/ruby/gems/shared/gems/scope-0.
2.4/lib/scope.rb:155:in `recursively_run_setup_and_teardown'\", \"c:/jruby-1.7.4/lib/ruby/
gems/shared/gems/scope-0.2.4/lib/scope.rb:139:in `run_setup_and_teardown'\", \"c:/jruby-1.
7.4/lib/ruby/gems/shared/gems/scope-0.2.4/lib/scope.rb:105:in `run'\", \"c:/jruby-1.7.4/li
b/ruby/gems/shared/gems/minitest-4.7.4/lib/minitest/unit.rb:933:in `_run_suite'\", \"org/j
ruby/RubyArray.java:2417:in `map'\", \"c:/jruby-1.7.4/lib/ruby/gems/shared/gems/minitest-4
.7.4/lib/minitest/unit.rb:926:in `_run_suite'\", \"c:/jruby-1.7.4/lib/ruby/gems/shared/gem
s/minitest-reporters-0.14.20/lib/minitest/reporter_runner.rb:45:in `_run_suite'\", \"c:/jr
uby-1.7.4/lib/ruby/gems/shared/gems/minitest-4.7.4/lib/minitest/parallel_each.rb:71:in `_r
un_suites'\", \"org/jruby/RubyArray.java:2417:in `map'\", \"c:/jruby-1.7.4/lib/ruby/gems/s
hared/gems/minitest-4.7.4/lib/minitest/parallel_each.rb:70:in `_run_suites'\", \"c:/jruby-
1.7.4/lib/ruby/gems/shared/gems/minitest-reporters-0.14.20/lib/minitest/reporter_runner.rb
:37:in `_run_suites'\", \"c:/jruby-1.7.4/lib/ruby/gems/shared/gems/minitest-4.7.4/lib/mini
test/unit.rb:877:in `_run_anything'\", \"c:/jruby-1.7.4/lib/ruby/gems/shared/gems/minitest
-4.7.4/lib/minitest/unit.rb:1085:in `run_tests'\", \"c:/jruby-1.7.4/lib/ruby/gems/shared/g
ems/minitest-reporters-0.14.20/lib/minitest/reporter_runner.rb:30:in `run_tests'\", \"org/
jruby/RubyBasicObject.java:1703:in `__send__'\", \"org/jruby/RubyKernel.java:2209:in `send
'\", \"c:/jruby-1.7.4/lib/ruby/gems/shared/gems/minitest-4.7.4/lib/minitest/unit.rb:1072:i
n `_run'\", \"org/jruby/RubyArray.java:1617:in `each'\", \"c:/jruby-1.7.4/lib/ruby/gems/sh
ared/gems/minitest-4.7.4/lib/minitest/unit.rb:1071:in `_run'\", \"c:/jruby-1.7.4/lib/ruby/
gems/shared/gems/minitest-4.7.4/lib/minitest/unit.rb:1059:in `run'\", \"tests/upload_brand
ing.rb:87:in `(root)'\"]","result":false}
在IRB中我发现以下错误
irb(main):038:0> Wait.until { $driver.find_element(:css,'div.ui-dialog-buttonse>button')[1].displayed? }
Selenium::WebDriver::Error::TimeOutError: timed out after 80 seconds (Unable to locate element: {"method":"css selector","selector":"div.ui-dialog-buttonse>button"})}
from C:/jruby-1.7.4/lib/ruby/gems/shared/gems/selenium-webdriver-2.33.0/lib/selenium/webdriver/common/wait.rb:57:in `until'
from (irb):38:in `evaluate'
from org/jruby/RubyKernel.java:1093:in `eval'
from org/jruby/RubyKernel.java:1489:in `loop'
from org/jruby/RubyKernel.java:1254:in `catch'
from org/jruby/RubyKernel.java:1254:in `catch'
from C:\jruby-1.7.4\/bin/jirb_swing:53:in `(root)'
也适用于第二个命令
irb(main):043:0> elem = $driver.find_element(:css,'div.ui-dialog-buttonse>button')[1]
Selenium::WebDriver::Error::NoSuchElementError: Unable to locate element: {"method":"css selector","selector":"div.ui-dialog-buttonse>button"}
from [remote server] file:///C:/Users/seema/AppData/Local/Temp/webdriver-profile20130704-2984-1wifg7r/extensions/fxdriver@googlecode.com/components/driver_component.js:8444:in `FirefoxDriver.prototype.findElementInternal_'
from [remote server] file:///C:/Users/seema/AppData/Local/Temp/webdriver-profile20130704-2984-1wifg7r/extensions/fxdriver@googlecode.com/components/driver_component.js:8453:in `FirefoxDriver.prototype.findElement'
from [remote server] file:///C:/Users/seema/AppData/Local/Temp/webdriver-profile20130704-2984-1wifg7r/extensions/fxdriver@googlecode.com/components/command_processor.js:10456:in `DelayedCommand.prototype.executeInternal_/h'
from [remote server] file:///C:/Users/seema/AppData/Local/Temp/webdriver-profile20130704-2984-1wifg7r/extensions/fxdriver@googlecode.com/components/command_processor.js:10461:in `DelayedCommand.prototype.executeInternal_'
from [remote server] file:///C:/Users/seema/AppData/Local/Temp/webdriver-profile20130704-2984-1wifg7r/extensions/fxdriver@googlecode.com/components/command_processor.js:10401:in `DelayedCommand.prototype.execute/<'
from C:/jruby-1.7.4/lib/ruby/gems/shared/gems/selenium-webdriver-2.33.0/lib/selenium/webdriver/remote/response.rb:51:in `assert_ok'
from C:/jruby-1.7.4/lib/ruby/gems/shared/gems/selenium-webdriver-2.33.0/lib/selenium/webdriver/remote/response.rb:15:in `initialize'
from C:/jruby-1.7.4/lib/ruby/gems/shared/gems/selenium-webdriver-2.33.0/lib/selenium/webdriver/remote/http/common.rb:59:in `create_response'
from C:/jruby-1.7.4/lib/ruby/gems/shared/gems/selenium-webdriver-2.33.0/lib/selenium/webdriver/remote/http/default.rb:66:in `request'
from C:/jruby-1.7.4/lib/ruby/gems/shared/gems/selenium-webdriver-2.33.0/lib/selenium/webdriver/remote/http/common.rb:40:in `call'
from C:/jruby-1.7.4/lib/ruby/gems/shared/gems/selenium-webdriver-2.33.0/lib/selenium/webdriver/remote/bridge.rb:629:in `raw_execute'
from C:/jruby-1.7.4/lib/ruby/gems/shared/gems/selenium-webdriver-2.33.0/lib/selenium/webdriver/remote/bridge.rb:607:in `execute'
from C:/jruby-1.7.4/lib/ruby/gems/shared/gems/selenium-webdriver-2.33.0/lib/selenium/webdriver/remote/bridge.rb:575:in `find_element_by'
from C:/jruby-1.7.4/lib/ruby/gems/shared/gems/selenium-webdriver-2.33.0/lib/selenium/webdriver/common/search_context.rb:42:in `find_element'
from (irb):43:in `evaluate'
from C:\jruby-1.7.4\/bin/jirb_swing:53:in `(root)'
请帮助
答案 0 :(得分：0)
首先查看链接Selenium::WebDriver::Wait以避免此类超时错误。
您可以尝试以下代码：
# implicit time out declarations
wait = Selenium::WebDriver::Wait.new(:timeout => 60)
# wait till the required button element being displayed
# Use the link : http://www.w3schools.com/cssref/css_selectors.asp
# for css selectors
wait.until { driver.find_element(:css,'div.ui-dialog-buttonse>button')[1].displayed? }
elem = driver.find_element(:css,'div.ui-dialog-buttonse>button')[1]
elem.sendKeys("C://path/To/File.jpg")
<强>更新
查看以下链接aria-disabled attribute和您的html部分，我看到aria-disabled设置为 false ：
<button class="otherButtonClass ui-state-hover ui-state-focus" type="button" role="button" aria-disabled="false">
禁用所需的按钮元素。
现在看到问题：Does WebDriver support file uploads?
您无法直接与本机操作系统文件浏览器对话框进行交互，但我们做了一些魔术，因此如果您在文件上传元素上调用WebElement #sendKeys（“/ path / to / file”），它就是正确的事情。确保你没有WebElement＃click（）文件上传元素，否则浏览器可能会挂起。
<强>更新
#implicit time out declarations
wait = Selenium::WebDriver::Wait.new(:timeout => 60)
#wait till the div element is being displayed
wait.until { driver.find_element(:css,'div.ui-dialog-buttonse').displayed? }
elem = driver.find_element(:css,'div.ui-dialog-buttonse')
js = <<-end
var buttons = document.querySelectorAll('button');
buttons[0].setAttribute('aria-disabled', true);
end
elem = driver.execute_script(js, elem)
elem.sendKeys("C://path//To//File.jpg")