module RailsJavascriptEmulation
  def self.included(base)
    base.class_eval do
      alias_method :click_without_rails_javascript_emulation, :click
    end
  end

  def click_with_rails_javascript_emulation
    if tag_name == 'a' and node['onclick'] =~ /m\.setAttribute\('name', '_method'\)/
      method = node['onclick'].match(/m\.setAttribute\('value', '([^']*)'\)/)[1]

      js_form = node.document.create_element('form')
      js_form['action'] = self[:href]
      js_form['method'] = 'POST'

      input = node.document.create_element('input')
      input['type'] = 'hidden'
      input['name'] = '_method'
      input['value'] = method
      js_form.add_child(input)

      Capybara::Driver::RackTest::Form.new(driver, js_form).submit(self)
    else
      click_without_rails_javascript_emulation
    end
  end
end

class Capybara::Driver::RackTest::Node
  include RailsJavascriptEmulation
end

Before('@emulate_rails_javascript') do
  Capybara::Driver::RackTest::Node.class_eval do
    alias_method :click, :click_with_rails_javascript_emulation
  end
end

After('@emulate_rails_javascript') do
  Capybara::Driver::RackTest::Node.class_eval do
    alias_method :click, :click_without_rails_javascript_emulation
  end
end