Add tests for Rack::Cache

1 files changed, 148 insertions, 0 deletions

diff --git a/railties/test/application/middleware/cache_test.rb b/railties/test/application/middleware/cache_test.rb
new file mode 100644
index 0000000000..655f9bcd55
--- /dev/null
+++ b/railties/test/application/middleware/cache_test.rb
@@ -0,0 +1,148 @@
+require 'isolation/abstract_unit'
+
+module ApplicationTests
+  class RoutingTest < Test::Unit::TestCase
+    include ActiveSupport::Testing::Isolation
+
+    def setup
+      build_app
+      boot_rails
+      require 'rack/test'
+      extend Rack::Test::Methods
+    end
+
+    def app(env = "production")
+      old_env = ENV["RAILS_ENV"]
+
+      @app ||= begin
+        ENV["RAILS_ENV"] = env
+        require "#{app_path}/config/environment"
+        Rails.application
+      end
+    ensure
+      ENV["RAILS_ENV"] = old_env
+    end
+
+    def simple_controller
+      controller :foo, <<-RUBY
+        class ExpiresController < ApplicationController
+          def expires_header
+            expires_in 10, :public => !params[:private]
+            render :text => ActiveSupport::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
+        private
+          def render_conditionally(headers)
+            if stale?(headers.merge(:public => !params[:private]))
+              render :text => ActiveSupport::SecureRandom.hex(16)
+            end
+          end
+        end
+      RUBY
+
+      app_file 'config/routes.rb', <<-RUBY
+        AppTemplate::Application.routes.draw do
+          match ':controller(/:action)'
+        end
+      RUBY
+    end
+
+    def test_cache_works_with_expires
+      simple_controller
+
+      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
+
+      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
+
+      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
+
+      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
+
+      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
+
+      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