Rspec + Capybara : How to click on alert box

Question

I have gone through the post of capybara + click on alert box but nothing seems to be work. Following is my scenario:

Scenario: When I click update

Answer 1

Updated answer here, since the options above seem to have all been deprecated.

Capybara::Session#accept_alert seems to be the best way to accomplish this now, where the action that will trigger the alert should be passed in a block. http://www.rubydoc.info/github/jnicklas/capybara/Capybara/Session:accept_alert

e.g.:

page.accept_alert 'Alert text here' do
    click_button('Search')
end