require "isolation/abstract_unit" module ApplicationTests class CacheTest < ActiveSupport::TestCase include ActiveSupport::Testing::Isolation def setup build_app require "rack/test" extend Rack::Test::Methods end def teardown teardown_app end def simple_controller controller :expires, <<-RUBY class ExpiresController < ApplicationController def expires_header expires_in 10, public: !params[:private] render plain: SecureRandom.hex(16) end def expires_etag render_conditionally(etag: "1") end def expires_last_modified $last_modified ||= Time.now.utc render_conditionally(last_modified: $last_modified) end def keeps_if_modified_since render plain: request.headers['If-Modified-Since'] end private def render_conditionally(headers) if stale?(headers.merge(public: !params[:private])) render plain: SecureRandom.hex(16) end end end RUBY app_file "config/routes.rb", <<-RUBY Rails.application.routes.draw do get ':controller(/:action)' end RUBY end def test_cache_keeps_if_modified_since simple_controller expected = "Wed, 30 May 1984 19:43:31 GMT" get "/expires/keeps_if_modified_since", {}, "HTTP_IF_MODIFIED_SINCE" => expected assert_equal 200, last_response.status assert_equal expected, last_response.body, "cache should have kept If-Modified-Since" end def test_cache_is_disabled_in_dev_mode simple_controller app("development") get "/expires/expires_header" assert_nil last_response.headers["X-Rack-Cache"] body = last_response.body get "/expires/expires_header" assert_nil last_response.headers["X-Rack-Cache"] assert_not_equal body, last_response.body end def test_cache_works_with_expires simple_controller add_to_config "config.action_dispatch.rack_cache = true" get "/expires/expires_header" assert_equal "miss, store", last_response.headers["X-Rack-Cache"] assert_equal "max-age=10, public", last_response.headers["Cache-Control"] body = last_response.body get "/expires/expires_header" assert_equal "fresh", last_response.headers["X-Rack-Cache"] assert_equal body, last_response.body end def test_cache_works_with_expires_private simple_controller add_to_config "config.action_dispatch.rack_cache = true" get "/expires/expires_header", private: true assert_equal "miss", last_response.headers["X-Rack-Cache"] assert_equal "private, max-age=10", last_response.headers["Cache-Control"] body = last_response.body get "/expires/expires_header", private: true assert_equal "miss", last_response.headers["X-Rack-Cache"] assert_not_equal body, last_response.body end def test_cache_works_with_etags simple_controller add_to_config "config.action_dispatch.rack_cache = true" get "/expires/expires_etag" assert_equal "miss, store", last_response.headers["X-Rack-Cache"] assert_equal "public", last_response.headers["Cache-Control"] body = last_response.body etag = last_response.headers["ETag"] get "/expires/expires_etag", {}, "If-None-Match" => etag assert_equal "stale, valid, store", last_response.headers["X-Rack-Cache"] assert_equal body, last_response.body end def test_cache_works_with_etags_private simple_controller add_to_config "config.action_dispatch.rack_cache = true" get "/expires/expires_etag", private: true assert_equal "miss", last_response.headers["X-Rack-Cache"] assert_equal "must-revalidate, private, max-age=0", last_response.headers["Cache-Control"] body = last_response.body etag = last_response.headers["ETag"] get "/expires/expires_etag", { private: true }, "If-None-Match" => etag assert_equal "miss", last_response.headers["X-Rack-Cache"] assert_not_equal body, last_response.body end def test_cache_works_with_last_modified simple_controller add_to_config "config.action_dispatch.rack_cache = true" get "/expires/expires_last_modified" assert_equal "miss, store", last_response.headers["X-Rack-Cache"] assert_equal "public", last_response.headers["Cache-Control"] body = last_response.body last = last_response.headers["Last-Modified"] get "/expires/expires_last_modified", {}, "If-Modified-Since" => last assert_equal "stale, valid, store", last_response.headers["X-Rack-Cache"] assert_equal body, last_response.body end def test_cache_works_with_last_modified_private simple_controller add_to_config "config.action_dispatch.rack_cache = true" get "/expires/expires_last_modified", private: true assert_equal "miss", last_response.headers["X-Rack-Cache"] assert_equal "must-revalidate, private, max-age=0", last_response.headers["Cache-Control"] body = last_response.body last = last_response.headers["Last-Modified"] get "/expires/expires_last_modified", { private: true }, "If-Modified-Since" => last assert_equal "miss", last_response.headers["X-Rack-Cache"] assert_not_equal body, last_response.body end end end