Memoize cookies so that updates to cookies are available in the current...

Memoize cookies so that updates to cookies are available in the current request. [#2733 state:resolved]
Signed-off-by: NJoshua Peek <josh@joshpeek.com>

actionpack/lib/action_controller/base/cookies.rb

@@ -51,7 +51,7 @@ def self.included(base)
     protected
       # Returns the cookie container, which operates as described above.
       def cookies
-        CookieJar.new(self)
+        @cookies ||= CookieJar.new(self)
       end
   end
 

actionpack/test/controller/cookie_test.rb

@@ -123,6 +123,12 @@ def test_delete_cookie_with_path
     assert_cookie_header "user_name=; path=/beaten; expires=Thu, 01-Jan-1970 00:00:00 GMT"
   end
 
+  def test_cookies_persist_throughout_request
+    get :authenticate
+    cookies = @controller.send(:cookies)
+    assert_equal 'david', cookies['user_name']
+  end
+  
   private
     def assert_cookie_header(expected)
       header = @response.headers["Set-Cookie"]