Implement FooController.action(:name)

  * Rails actions are now Rack endpoints, and can be retrieved
    via FooController.action(name) and called with an env
  * Updated some tests that relied on the old internal
    #process/#call implementation

actionpack/lib/action_controller/base/base.rb

@@ -370,18 +370,18 @@ def session
     attr_reader :template
 
     class << self
-      def call(env)
-        # HACK: For global rescue to have access to the original request and response
-        request = env["action_controller.rescue.request"] ||= ActionDispatch::Request.new(env)
-        response = env["action_controller.rescue.response"] ||= ActionDispatch::Response.new
-        process(request, response)
-      end
-
-      # Factory for the standard create, process loop where the controller is discarded after processing.
-      def process(request, response) #:nodoc:
-        new.process(request, response)
+      def action(name = nil)
+        @actions ||= {}
+        @actions[name] ||= proc do |env| 
+          controller = new
+          # HACK: For global rescue to have access to the original request and response
+          request = env["action_controller.rescue.request"] ||= ActionDispatch::Request.new(env)
+          response = env["action_controller.rescue.response"] ||= ActionDispatch::Response.new
+          controller.action_name = name && name.to_s
+          controller.process(request, response).to_a
+        end
       end
-
+      
       # Converts the class name from something like "OneModule::TwoModule::NeatController" to "NeatController".
       def controller_class_name
         @controller_class_name ||= name.demodulize
@@ -518,7 +518,6 @@ def process(request, response, method = :perform_action, *arguments) #:nodoc:
         assign_shortcuts(request, response)
         initialize_template_class(response)
         initialize_current_url
-        assign_names
 
         log_processing
         send(method, *arguments)
@@ -883,10 +882,6 @@ def performed?
         @performed_render || @performed_redirect
       end
 
-      def assign_names
-        @action_name = (params['action'] || 'index')
-      end
-
       def reset_variables_added_to_assigns
         @template.instance_variable_set("@assigns_added", nil)
       end

actionpack/lib/action_controller/new_base/http.rb

@@ -39,13 +39,20 @@ def self.call(env)
     end
 
     # :api: private
-    def call(env)
+    def call(name, env)
       @_request = ActionDispatch::Request.new(env)
       @_response = ActionDispatch::Response.new
-      process(@_request.parameters[:action])
+      process(name)
       @_response.body = response_body
       @_response.prepare!
-      self
+      to_rack
+    end
+
+    def self.action(name)
+      @actions ||= {}
+      @actions[name] ||= proc do |env| 
+        new.call(name, env)
+      end
     end
 
     # :api: private

actionpack/lib/action_controller/routing/route_set.rb

@@ -430,7 +430,7 @@ def raise_named_route_error(options, named_route, named_route_name)
       def call(env)
         request = ActionDispatch::Request.new(env)
         app = Routing::Routes.recognize(request)
-        app.call(env).to_a
+        app.action(request.parameters[:action] || 'index').call(env)
       end
 
       def recognize(request)

actionpack/lib/action_controller/testing/process.rb

@@ -131,7 +131,11 @@ def process(action, parameters = nil, session = nil, flash = nil, http_method =
       @request.session["flash"] = ActionController::Flash::FlashHash.new.update(flash) if flash
       build_request_uri(action, parameters)
 
+      @request.env["action_controller.rescue.request"] = @request
+      @request.env["action_controller.rescue.request"] = @response
+
       Base.class_eval { include ProcessWithTest } unless Base < ProcessWithTest
+      @controller.action_name = action.to_s
       @controller.process(@request, @response)
     end
 

actionpack/test/controller/filters_test.rb

@@ -602,8 +602,9 @@ def test_filters_with_mixed_specialization_run_in_order
   def test_dynamic_dispatch
     %w(foo bar baz).each do |action|
       request = ActionController::TestRequest.new
+      request.env["action_controller.rescue.request"] = request
       request.query_parameters[:choose] = action
-      response = DynamicDispatchController.process(request, ActionController::TestResponse.new)
+      response = DynamicDispatchController.action.call(request.env).last
       assert_equal action, response.body
     end
   end

actionpack/test/controller/helper_test.rb

@@ -101,20 +101,30 @@ def test_helper_attr
     assert master_helper_methods.include?('delegate_attr=')
   end
 
-  def test_helper_for_nested_controller
+  def call_controller(klass, action)
     request  = ActionController::TestRequest.new
-    response = ActionController::TestResponse.new
-    request.action = 'render_hello_world'
+    request.env["action_controller.rescue.request"] = request
+    klass.action(action).call(request.env)    
+  end
 
-    assert_equal 'hello: Iz guuut!', Fun::GamesController.process(request, response).body
+  def test_helper_for_nested_controller
+    assert_equal 'hello: Iz guuut!', 
+      call_controller(Fun::GamesController, "render_hello_world").last.body
+    # request  = ActionController::TestRequest.new
+    # request.env["action_controller.rescue.request"] = request
+    # 
+    # resp = Fun::GamesController.action(:render_hello_world).call(request.env)
+    # assert_equal 'hello: Iz guuut!', resp.last.body
   end
 
   def test_helper_for_acronym_controller
-    request  = ActionController::TestRequest.new
-    response = ActionController::TestResponse.new
-    request.action = 'test'
-
-    assert_equal 'test: baz', Fun::PdfController.process(request, response).body
+    assert_equal "test: baz", call_controller(Fun::PdfController, "test").last.body
+    # 
+    # request  = ActionController::TestRequest.new
+    # response = ActionController::TestResponse.new
+    # request.action = 'test'
+    # 
+    # assert_equal 'test: baz', Fun::PdfController.process(request, response).body
   end
 
   def test_all_helpers
@@ -204,21 +214,27 @@ def index
     end
   end
 
+  def call_controller(klass, action)
+    request  = ActionController::TestRequest.new
+    request.env["action_controller.rescue.request"] = request
+    klass.action(action).call(request.env)    
+  end
+
   def setup
     @request    = ActionController::TestRequest.new
     @response   = ActionController::TestResponse.new
     @request.action = 'index'
   end
 
   def test_helper_in_a
-    assert_raise(ActionView::TemplateError) { A.process(@request, @response) }
+    assert_raise(ActionView::TemplateError) { call_controller(A, "index") }
   end
 
   def test_helper_in_b
-    assert_equal 'B', B.process(@request, @response).body
+    assert_equal 'B', call_controller(B, "index").last.body
   end
 
   def test_helper_in_c
-    assert_equal 'C', C.process(@request, @response).body
+    assert_equal 'C', call_controller(C, "index").last.body
   end
 end

actionpack/test/new_base/test_helper.rb

@@ -66,7 +66,7 @@ def self.get(url)
   end
 
   def assert_body(body)
-    assert_equal body, last_response.body
+    assert_equal body, Array.wrap(last_response.body).join
   end
 
   def self.assert_body(body)