3 files changed, 36 insertions, 5 deletions
diff --git a/actionpack/lib/action_controller/testing/process.rb b/actionpack/lib/action_controller/testing/process.rb
index e0f8f026fd..2fbd89ae1c 100644
--- a/actionpack/lib/action_controller/testing/process.rb
+++ b/actionpack/lib/action_controller/testing/process.rb
@@ -2,7 +2,6 @@ require 'rack/session/abstract/id'
 
 module ActionController #:nodoc:
   class TestRequest < ActionDispatch::TestRequest #:nodoc:
-    attr_accessor :cookies
     attr_accessor :query_parameters
 
     def initialize(env = {})
@@ -13,7 +12,6 @@ module ActionController #:nodoc:
       self.session_options = TestSession::DEFAULT_OPTIONS.merge(:id => ActiveSupport::SecureRandom.hex(16))
 
       @request_uri = "/"
-      @cookies = {}
     end
 
     # Wraps raw_post in a StringIO.
diff --git a/actionpack/lib/action_dispatch/testing/test_request.rb b/actionpack/lib/action_dispatch/testing/test_request.rb
index 3d20b466d3..bd6c26b69b 100644
--- a/actionpack/lib/action_dispatch/testing/test_request.rb
+++ b/actionpack/lib/action_dispatch/testing/test_request.rb
@@ -1,17 +1,24 @@
 module ActionDispatch
   class TestRequest < Request
+    DEFAULT_ENV = Rack::MockRequest.env_for('/')
+
     def self.new(env = {})
       super
     end
 
     def initialize(env = {})
-      super(Rack::MockRequest.env_for('/').merge(env))
+      super(DEFAULT_ENV.merge(env))
 
       self.host        = 'test.host'
       self.remote_addr = '0.0.0.0'
       self.user_agent  = 'Rails Testing'
     end
 
+    def env
+      write_cookies!
+      super
+    end
+
     def request_method=(method)
       @env['REQUEST_METHOD'] = method.to_s.upcase
     end
@@ -49,8 +56,19 @@ module ActionDispatch
     end
 
     def accept=(mime_types)
-      @env.delete("action_dispatch.request.accepts")
-      @env["HTTP_ACCEPT"] = Array(mime_types).collect { |mime_types| mime_types.to_s }.join(",")
+      @env.delete('action_dispatch.request.accepts')
+      @env['HTTP_ACCEPT'] = Array(mime_types).collect { |mime_types| mime_types.to_s }.join(",")
     end
+
+    def cookies
+      @cookies ||= super
+    end
+
+    private
+      def write_cookies!
+        unless @cookies.blank?
+          @env['HTTP_COOKIE'] = @cookies.map { |name, value| "#{name}=#{value};" }.join(' ')
+        end
+      end
   end
 end
diff --git a/actionpack/test/dispatch/test_request_test.rb b/actionpack/test/dispatch/test_request_test.rb
index f13f67f0ae..19b5e2988b 100644
--- a/actionpack/test/dispatch/test_request_test.rb
+++ b/actionpack/test/dispatch/test_request_test.rb
@@ -27,4 +27,19 @@ class TestRequestTest < ActiveSupport::TestCase
 
     assert env.empty?, env.inspect
   end
+
+  test "cookie jar" do
+    req = ActionDispatch::TestRequest.new
+
+    assert_equal({}, req.cookies)
+    assert_equal nil, req.env["HTTP_COOKIE"]
+
+    req.cookies["user_name"] = "david"
+    assert_equal({"user_name" => "david"}, req.cookies)
+    assert_equal "user_name=david;", req.env["HTTP_COOKIE"]
+
+    req.cookies["login"] = "XJ-122"
+    assert_equal({"user_name" => "david", "login" => "XJ-122"}, req.cookies)
+    assert_equal "login=XJ-122; user_name=david;", req.env["HTTP_COOKIE"]
+  end
 end