patch.diff

diff --git a/actionpack/test/activerecord/polymorphic_routes_test.rb b/actionpack/test/activerecord/polymorphic_routes_test.rb
new file mode 100644
index 0000000..24eb16d
--- /dev/null
+++ b/actionpack/test/activerecord/polymorphic_routes_test.rb
@@ -0,0 +1,48 @@
+require 'active_record_unit'
+
+class PolymorphicRoutesTest < ActionController::TestCase
+  include ActionController::UrlWriter
+  self.default_url_options[:host] = "lifo.com"
+
+  def setup
+    @developer = Developer.new
+    @topic = Topic.new
+    @company = Company.new
+  end
+
+  def test_with_record
+    with_test_routes do
+      @developer.save
+      assert_equal "http://lifo.com/developers/#{@developer.id}", polymorphic_url(@developer)
+    end
+  end
+
+  def test_uncountable_resource
+    with_test_routes do
+      @topic.save
+      assert_equal "http://lifo.com/topics/#{@topic.id}", polymorphic_url(@topic)
+    end
+  end
+  
+  def test_uncountable_resource_with_singular_option
+    with_test_routes do
+      @company.save
+      assert_equal "http://lifo.com/companies/#{@company.id}", polymorphic_url(@company)
+    end
+  end
+
+  private
+
+  def with_test_routes
+    with_routing do |set|
+      set.draw do |map|
+        map.resources :developers
+        map.resources :topics
+        map.resources :companies, :singular => :company_instance
+      end
+
+      ActionController::Routing::Routes.install_helpers(self.class)
+      yield
+    end
+  end
+end
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