Mislav's method to log in without messing with the form in Cucumber

login_backdoor.feature

# Eg Given I am logged in as @mislav
#
Given /^I am logged in as @(\w+)$/ do |username|
  visit "/login/#{username}"
  @current_user = User.find_by_login(username)
end

routes.rb

if Rails.env.cucumber?
  map.login_backdoor '/login/:username',
    :controller => 'sessions', :action => 'backdoor'
end

sessions_controller.rb

class SessionsController < ApplicationController

  # for cucumber testing only
  def backdoor
    logout_killing_session!
    self.current_user = User.find_by_login!(params[:username])
    head :ok
  end

end