Fix url_for with no arguments when default_url_options is not explicitly...

Fix url_for with no arguments when default_url_options is not explicitly defined. [#339 state:resolved]
Signed-off-by: NPratik Naik <pratiknaik@gmail.com>

actionpack/lib/action_controller/base.rb

@@ -606,8 +606,8 @@ def process(request, response, method = :perform_action, *arguments) #:nodoc:
       #
       # This takes the current URL as is and only exchanges the action. In contrast, <tt>url_for :action => 'print'</tt>
       # would have slashed-off the path components after the changed action.
-      def url_for(options = nil) #:doc:
-        case options || {}
+      def url_for(options = {}) #:doc:
+        case options
           when String
             options
           when Hash

actionpack/test/controller/base_test.rb

@@ -169,6 +169,22 @@ def test_default_url_options_are_used_if_set
   end
 end
 
+class EmptyUrlOptionsTest < Test::Unit::TestCase
+  def setup
+    @controller = NonEmptyController.new
+
+    @request    = ActionController::TestRequest.new
+    @response   = ActionController::TestResponse.new
+
+    @request.host = 'www.example.com'
+  end
+
+  def test_ensure_url_for_works_as_expected_when_called_with_no_options_if_default_url_options_is_not_set
+    get :public_action
+    assert_equal "http://www.example.com/non_empty/public_action", @controller.url_for
+  end
+end
+
 class EnsureNamedRoutesWorksTicket22BugTest < Test::Unit::TestCase
   def test_named_routes_still_work
     ActionController::Routing::Routes.draw do |map|
@@ -180,4 +196,4 @@ def test_named_routes_still_work
   ensure
     ActionController::Routing::Routes.load!
   end
-end
+end
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