Save screenshot on failed integration tests with capybara.

test_helper.rb

# test/test_helper.rb

class ActionDispatch::IntegrationTest
  def after_teardown
    if !passed?
      timestamp = "#{Time.zone.now.strftime('%Y-%m-%d-%H:%M:%S')}"
      screenshot_name = "screenshot-#{timestamp}.png"
      # Handle CircleCi too
      screenshot_path = "#{ENV.fetch('CIRCLE_ARTIFACTS', Rails.root.join('tmp/capybara'))}/#{screenshot_name}"
      page.save_screenshot(screenshot_path)
    end
    super
  end
end