How do I confirm a javascript popup with Capybara? - ruby-on-rails

Question

I've tried several examples found online, but with no luck. I am looking to confirm the confirm message of a delete link. The last attempt was the code below, but that resulted in an Capybara::NotSupportedByDriverError error.
def confirm_dialog
page.evaluate_script('window.confirm = function() { return true; }')
end

Answer 1

Adding an answer for those hitting this in 2016 and beyond. You can now use Capybara directly to accept a confirmation box. You do this by wrapping the code that causes the confirmation box to appear in the accept_confirm function.
accept_confirm do
click_link 'Destroy'
end

Answer 2

First of all switch to using Selenium as the driver by putting an #javascript tag in front of your scenario.
The following code in your cucumber step will then confirm the dialogue:
page.driver.browser.switch_to.alert.accept
# or
page.driver.browser.switch_to.alert.dismiss
# or
page.driver.browser.switch_to.alert.text
As #NobbZ said, this question has been asked and answered before here: How to test a confirm dialog with Cucumber?.
More selenium documentation available here too: http://code.google.com/p/selenium/wiki/RubyBindings#JavaScript_dialogs

Answer 3

for capybara-webkit:
page.driver.browser.accept_js_confirms
page.driver.browser.reject_js_confirms
which is still working, but the documentation says also:
page.driver.accept_js_confirms!
page.driver.accept_js_confirms!
See https://github.com/thoughtbot/capybara-webkit , search "accept_js_confirms"

Answer 4

I've had timing issues with browser dialogs in a CI environment so I'm polling for a dialog before accepting it:
def accept_browser_dialog
wait = Selenium::WebDriver::Wait.new(:timeout => 30)
wait.until {
begin
page.driver.browser.switch_to.alert
true
rescue Selenium::WebDriver::Error::NoAlertPresentError
false
end
}
page.driver.browser.switch_to.alert.accept
end

Answer 5

I had to use a sleep in the webkit test since it would fail everynow and then otherwise.
Here is what I came up with after reading everyones posts:
if page.driver.class == Capybara::Selenium::Driver
page.driver.browser.switch_to.alert.accept
elsif page.driver.class == Capybara::Webkit::Driver
sleep 1 # prevent test from failing by waiting for popup
page.driver.browser.accept_js_confirms
else
raise "Unsupported driver"
end

Answer 6

try to add :js => true to your test.
RSpec’s metadata feature can be used to switch to a different driver.
Use :js => true to switch to the javascript driver, or provide a
:driver option to switch to one specific driver. For example:
it 'will use the default js driver' :js => true do
...
end

Answer 7

In Capybara its very simple to accept the model window. Even we can do the same in selenium but its little tough for people who are not aware about selenium.
page.accept_modal #This will accept the modal window
page.dismiss_modal #This will Reject/Dismiss the modal window

Answer 8

I would guess that you have to add selenium to your gem-file and configure it and capybara that capybara uses selenium as the driver.
I think also that How to test a confirm dialog with Cucumber? is very similar to your question, especially the accepted answer.