require 'rubygems'
require_gem 'rails'
require 'action_controller/test_process'
require 'test/unit'
require 'lib/http_caching'


ActionController::Routing::Routes.draw do |map|
  map.connect ':controller/:action/:id'
end

# The base class for testing.
class ApplicationController < ActionController::Base
  def rescue_action(e) raise e end; 
  
  # This is some regular content. Well, time-wise it's regular. It's updated on
  # a regular basis.
  def index_without_cache
    @pony_palace_parade = "Excelsior!"
    render :text => 'Whee!'
  end
  
  # This is some really old content, and it's never updated. Hasn't been updated
  # since the Great Turnip/Gopher Fire of aught-three! If someone got a copy any
  # time in the past three years, don't send them a new one--it's 300TB!
  def index_with_cache
    if_cached_before 3.years.ago do
      @woo_hah = 'Thwarp!'
      render :text => 'Majestesticular.'
    end
  end
  
  # This is some really old content too, but in a different format.
  def index_with_cache_render
    render_if_cached_before 3.years.ago, :text => 'MYEWTAYNTZ!'
  end
end

class HttpCachingTest < Test::Unit::TestCase
  def setup
    @request    = ActionController::TestRequest.new
    @response   = ActionController::TestResponse.new
    @controller = ApplicationController.new
  end
  
  def test_baseline
    get :index_without_cache
    assert_response :success
    assert_not_nil assigns(:pony_palace_parade)
  end
  
  def test_unless_cached_before
    # "I'd like a copy if it's been updated in the past <atomic clock skew>ms!"
    @request.env['HTTP_IF_MODIFIED_SINCE'] = Time.now.httpdate
    get :index_with_cache
    
    # "Sure thing, freakmeat! Oh wait--CACHE! Smell you later!"
    assert_response 304
    assert_nil assigns(:woo_hah)
    
    # "I'm from the past! I don't know what a button is! Give me this file"
    @request.env['HTTP_IF_MODIFIED_SINCE'] = 4.years.ago.httpdate
    get :index_with_cache
    
    # "Sure thing, grand-dad! Here's an iron axe while we're at it. They're all
    #  the rage with the kids, by which I mean they are fashionable!"
    assert_response :success
    assert_not_nil assigns(:woo_hah)
    
    # "I'm a mysterious stranger, trying to make a home for myself in this
    #  crazy, mixed-up world of crappy browsers."
    @request.env['HTTP_IF_MODIFIED_SINCE'] = nil
    get :index_with_cache
    
    # "Sure thing, Bananahands--I mean, tall, dark and handsome!"
    assert_response :success
    assert_not_nil assigns(:woo_hah)
  end
  
  def test_render_unless_cached_before
    @request.env['HTTP_IF_MODIFIED_SINCE'] = Time.now.httpdate
    get :index_with_cache_render
    assert_response 304
    
    @request.env['HTTP_IF_MODIFIED_SINCE'] = 4.years.ago.httpdate
    get :index_with_cache_render
    assert_response :success
    
    @request.env['HTTP_IF_MODIFIED_SINCE'] = nil
    get :index_with_cache_render
    assert_response :success
  end
end