rails/actionpack/test/controller/action_caching_test.rb

require 'fileutils'
require File.dirname(__FILE__) + '/../abstract_unit'

CACHE_DIR = 'test_cache'
# Don't change '/../temp/' cavalierly or you might hoze something you don't want hozed
FILE_STORE_PATH = File.join(File.dirname(__FILE__), '/../temp/', CACHE_DIR)
ActionController::Base.perform_caching = true
ActionController::Base.fragment_cache_store = :file_store, FILE_STORE_PATH

class ActionCachingTestController < ActionController::Base
  caches_action :index
 
  def index
    @cache_this = Time.now.to_f.to_s
    render :text => @cache_this
  end
  
  def expire
    expire_action :controller => 'action_caching_test', :action => 'index'
    render :nothing => true
  end
  
end

class ActionCachingMockController
  attr_accessor :mock_url_for
  attr_accessor :mock_path
  
  def initialize
    yield self if block_given?
  end
  
  def url_for(*args)
    @mock_url_for
  end
  
  def request
    mocked_path = @mock_path
    Object.new.instance_eval(<<-EVAL)
      def path; '#{@mock_path}' end
      self
    EVAL
  end
end

class ActionCacheTest < Test::Unit::TestCase
  def setup
    reset!
    FileUtils.mkdir_p(FILE_STORE_PATH)
    @path_class = ActionController::Caching::Actions::ActionCachePath
    @mock_controller = ActionCachingMockController.new
  end
  
  def teardown
    FileUtils.rm_rf(File.dirname(FILE_STORE_PATH))
  end
  
  def test_simple_action_cache
    get :index
    cached_time = content_to_cache
    assert_equal cached_time, @response.body
    reset!
    
    get :index
    assert_equal cached_time, @response.body
  end
  
  def test_cache_expiration
    get :index
    cached_time = content_to_cache
    reset!
        
    get :index
    assert_equal cached_time, @response.body
    reset!

    get :expire
    reset!
    
    get :index
    new_cached_time = content_to_cache
    assert_not_equal cached_time, @response.body
    reset!
    
    get :index
    assert_response :success
    assert_equal new_cached_time, @response.body
  end
  
  def test_cache_is_scoped_by_subdomain
    @request.host = 'jamis.hostname.com'
    get :index
    jamis_cache = content_to_cache
    
    @request.host = 'david.hostname.com'
    get :index
    david_cache = content_to_cache
    assert_not_equal jamis_cache, @response.body
    
    @request.host = 'jamis.hostname.com'
    get :index
    assert_equal jamis_cache, @response.body
    
    @request.host = 'david.hostname.com'
    get :index
    assert_equal david_cache, @response.body
  end
  
  def test_xml_version_of_resource_is_treated_as_different_cache
    @mock_controller.mock_url_for = 'http://example.org/posts/'
    @mock_controller.mock_path    = '/posts/index.xml'
    path_object = @path_class.new(@mock_controller)
    assert_equal 'xml', path_object.extension
    assert_equal 'example.org/posts/index.xml', path_object.path
  end
  
  def test_empty_path_is_normalized
    @mock_controller.mock_url_for = 'http://example.org/'
    @mock_controller.mock_path    = '/'

    assert_equal 'example.org/index', @path_class.path_for(@mock_controller)
  end
  
  private
  
    def content_to_cache
      assigns(:cache_this)
    end
    
    def reset!
      @request    = ActionController::TestRequest.new
      @response   = ActionController::TestResponse.new
      @controller = ActionCachingTestController.new
      @request.host = 'hostname.com'
    end
  
end