gistfile1.txt

With this code: 

browser.link(:text, "Move questions to...").click

browser.alert do
  browser.button(:id => "alert").click
end #=> "the alert message"

I get this error:

/Users/riccardotacconi/.rvm/gems/ree-1.8.7-2010.01/gems/watir-webdriver-0.0.9/lib/watir-webdriver/elements/element.rb:182:in `assert_exists': unable to locate element, using {:tag_name=>"button", :id=>"alert"} (Watir::Exception::UnknownObjectException) from /Users/riccardotacconi/.rvm/gems/ree-1.8.7-2010.01/gems/watir-webdriver-0.0.9/lib/watir-webdriver/elements/element.rb:65:in `click' from watir.rb:183 from /Users/riccardotacconi/.rvm/gems/ree-1.8.7-2010.01/gems/watir-webdriver-0.0.9/lib/watir-webdriver/extensions/alerts.rb:24:in `alert' from watir.rb:182

Solved by intercepting the error, but it is a dirty hacks (in .rvm/gems/ree-1.8.7-2010.01/gems/watir-webdriver-0.0.9/lib/watir-webdriver/extensions/alerts.rb:24):

    def alert(&blk)
      execute_script "window.alert = function(msg) { window.lastAlert = msg; }"
      begin
        yield
      rescue
        # nothing
      end
      execute_script "return window.lastAlert"
    end