Helper for capybara to fill in wysihtml5 fields respecting `within` scopes

wysihtml5_helper.rb

module Wysihtml5Helper
  def fill_in_html name, options
    options.to_options!.assert_valid_keys :with
    if Capybara.current_driver == Capybara.javascript_driver
      # Dip inside capybara session to respect current `within` scope
      scope = page.send(:current_node).path
      # Find the textarea based on label name within the given scope
      query = "$('label:contains(#{name.inspect}) ~ textarea:eq(0)', document.evaluate(#{scope.inspect}, document).iterateNext())"
      # Make sure the editor is instantiated -- this is us, not wysihtml5
      wait_until { page.evaluate_script("!!#{query}.data('editor')") }
      # Set the value using wysihtml5 api
      page.execute_script %{#{query}.data('editor').setValue(#{options[:with].to_json})}
    else
      fill_in name, options
    end
  end
end

What JS driver are you using to achieve line 6?

Getting Capybara::NotSupportedByDriverError from standard Selenium

I wasn't able to get this to work, but found an alternative solution, see https://gist.github.com/racheldonovan/5416557