Ruby on Rails: Cucumber: how to verify javascript alert text?

So, my app has a javascript aler开发者_Python百科t... how do I, using cucumber and / or capybara, test that the alert hay a particular string?

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Try Cucumber + Webrat + Selenium. You can then write statements like

selenium.is_alert_present.should be_true
selenium.get_alert.should eql("File Deleted")

:-)