ruby-on-rails - 如何在 capybara 场景中添加等待条件？

Question

我正在使用capybara来测试我的Rails应用程序以进行集成测试。
在我的应用程序中，有许多Lightbox，Ajax和js调用。

 @javascript   
  Scenario: I agree functionatilty
   Given I go to the create account page
   When I click on button which is given as image "lnkTerms2"
   And I follow "i_agree"
   Then I go to the create account page

在上面的代码中，lnkTerms2是和id，这将有助于调用js函数来打开灯箱。
我收到一个错误

   Element is not currently visible and so may not be interacted with (Selenium::WebDriver::Error::ElementNotDisplayedError)
      [remote server] resource://fxdriver/modules/atoms.js:9519:in `unknown'
      [remote server] file:///tmp/webdriver-profile20111117-6876-18cfcfp/extensions/fxdriver@googlecode.com/components/nsCommandProcessor.js:256:in `unknown'
      [remote server] file:///tmp/webdriver-profile20111117-6876-18cfcfp/extensions/fxdriver@googlecode.com/components/nsCommandProcessor.js:305:in `unknown'
      [remote server] file:///tmp/webdriver-profile20111117-6876-18cfcfp/extensions/fxdriver@googlecode.com/components/nsCommandProcessor.js:320:in `unknown'
      [remote server] file:///tmp/webdriver-profile20111117-6876-18cfcfp/extensions/fxdriver@googlecode.com/components/nsCommandProcessor.js:197:in `unknown'
      (eval):2:in `send'
      (eval):2:in `click_link'
      ./features/step_definitions/web_steps.rb:300:in `/^I click on button which is given as image "([^"]*)"$/'
      features/Sign_up_process.feature:61:in `When I click on button which is given as image "lnkTerms2"'

问题是由于在webdriver中调用了此函数，因此没有时间加载javascript和ajax调用。
而且灯箱没有打开。
因此，请提出任何解决方案。

另外，如果我写那行

When I click on button which is given as image "lnkTerms2"

在4到5条语句之后，它可以正常工作，因为它有时间加载js。

Answer 1

对于等待ajax的步骤后的暂停，请尝试:

And I wait 5 seconds

您必须将以下代码添加到web_steps.rb:

When /^I wait (\d+) seconds?$/ do |seconds|
  sleep seconds.to_i
end