diff --git a/spec/dummy/app/assets/javascripts/application.js b/spec/dummy/app/assets/javascripts/application.js
deleted file mode 100644
index 15ebed9..0000000
--- a/spec/dummy/app/assets/javascripts/application.js
+++ /dev/null
@@ -1,13 +0,0 @@
-// This is a manifest file that'll be compiled into application.js, which will include all the files
-// listed below.
-//
-// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
-// or vendor/assets/javascripts of plugins, if any, can be referenced here using a relative path.
-//
-// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
-// the compiled file.
-//
-// WARNING: THE FIRST BLANK LINE MARKS THE END OF WHAT'S TO BE PROCESSED, ANY BLANK LINE SHOULD
-// GO AFTER THE REQUIRES BELOW.
-//
-//= require_tree .
diff --git a/spec/dummy/app/assets/stylesheets/application.css b/spec/dummy/app/assets/stylesheets/application.css
deleted file mode 100644
index 3192ec8..0000000
--- a/spec/dummy/app/assets/stylesheets/application.css
+++ /dev/null
@@ -1,13 +0,0 @@
-/*
- * This is a manifest file that'll be compiled into application.css, which will include all the files
- * listed below.
- *
- * Any CSS and SCSS file within this directory, lib/assets/stylesheets, vendor/assets/stylesheets,
- * or vendor/assets/stylesheets of plugins, if any, can be referenced here using a relative path.
- *
- * You're free to add application-wide styles to this file and they'll appear at the top of the
- * compiled file, but it's generally better to create a new file per style scope.
- *
- *= require_self
- *= require_tree .
- */
diff --git a/spec/dummy/app/controllers/application_controller.rb b/spec/dummy/app/controllers/application_controller.rb
index c3bb2fc..bbe1d38 100644
--- a/spec/dummy/app/controllers/application_controller.rb
+++ b/spec/dummy/app/controllers/application_controller.rb
@@ -1,7 +1,4 @@
 class ApplicationController < ActionController::Base
+  include LocalizedUrls
   protect_from_forgery
-
-  def default_url_options(options = {})
-    {locale: I18n.locale, host: "www.example.com", port: nil}
-  end
 end
diff --git a/spec/dummy/app/controllers/localized_urls.rb b/spec/dummy/app/controllers/localized_urls.rb
new file mode 100644
index 0000000..1fd349e
--- /dev/null
+++ b/spec/dummy/app/controllers/localized_urls.rb
@@ -0,0 +1,5 @@
+module LocalizedUrls
+  def default_url_options(options = {})
+    {locale: I18n.locale, host: "www.example.com", port: nil}
+  end
+end
diff --git a/spec/dummy/app/controllers/posts_controller.rb b/spec/dummy/app/controllers/posts_controller.rb
index ddc929c..e6e9aaf 100644
--- a/spec/dummy/app/controllers/posts_controller.rb
+++ b/spec/dummy/app/controllers/posts_controller.rb
@@ -1,5 +1,17 @@
 class PostsController < ApplicationController
   def show
+    fetch_post
+  end
+
+  def mail
+    fetch_post
+    email = PostMailer.decorated_email(@post).deliver
+    render text: email.body
+  end
+
+  private
+
+  def fetch_post
     @post = Post.find(params[:id]).decorate
   end
 end
diff --git a/spec/dummy/app/mailers/.gitkeep b/spec/dummy/app/mailers/.gitkeep
deleted file mode 100644
index e69de29..0000000
diff --git a/spec/dummy/app/mailers/application_mailer.rb b/spec/dummy/app/mailers/application_mailer.rb
new file mode 100644
index 0000000..1fffe38
--- /dev/null
+++ b/spec/dummy/app/mailers/application_mailer.rb
@@ -0,0 +1,3 @@
+class ApplicationMailer < ActionMailer::Base
+  include LocalizedUrls
+end
diff --git a/spec/dummy/app/mailers/post_mailer.rb b/spec/dummy/app/mailers/post_mailer.rb
new file mode 100644
index 0000000..da6f258
--- /dev/null
+++ b/spec/dummy/app/mailers/post_mailer.rb
@@ -0,0 +1,9 @@
+class PostMailer < ApplicationMailer
+  default from: "from@example.com"
+  layout "application"
+
+  def decorated_email(post)
+    @post = post.decorate
+    mail to: "to@example.com", subject: "A decorated post"
+  end
+end
diff --git a/spec/dummy/app/models/.gitkeep b/spec/dummy/app/models/.gitkeep
deleted file mode 100644
index e69de29..0000000
diff --git a/spec/dummy/app/views/layouts/application.html.erb b/spec/dummy/app/views/layouts/application.html.erb
index 4cab268..9bc7c74 100644
--- a/spec/dummy/app/views/layouts/application.html.erb
+++ b/spec/dummy/app/views/layouts/application.html.erb
@@ -2,9 +2,6 @@
 <html>
 <head>
   <title>Dummy</title>
-  <%= stylesheet_link_tag    "application", :media => "all" %>
-  <%= javascript_include_tag "application" %>
-  <%= csrf_meta_tags %>
 </head>
 <body>
 
diff --git a/spec/dummy/app/views/post_mailer/decorated_email.html.erb b/spec/dummy/app/views/post_mailer/decorated_email.html.erb
new file mode 100644
index 0000000..83969c2
--- /dev/null
+++ b/spec/dummy/app/views/post_mailer/decorated_email.html.erb
@@ -0,0 +1 @@
+<%= render @post %>
diff --git a/spec/dummy/app/views/posts/_post.html.erb b/spec/dummy/app/views/posts/_post.html.erb
new file mode 100644
index 0000000..ba0387e
--- /dev/null
+++ b/spec/dummy/app/views/posts/_post.html.erb
@@ -0,0 +1,19 @@
+<dl>
+  <dt>Environment:</dt>
+  <dd id="environment"><%= Rails.env %></dd>
+
+  <dt>Posted:</dt>
+  <dd id="posted_date"><%= post.posted_date %></dd>
+
+  <dt>Path with model:</dt>
+  <dd id="path_with_model"><%= post.path_with_model %></dd>
+
+  <dt>Path with id:</dt>
+  <dd id="path_with_id"><%= post.path_with_id %></dd>
+
+  <dt>URL with model:</dt>
+  <dd id="url_with_model"><%= post.url_with_model %></dd>
+
+  <dt>URL with id:</dt>
+  <dd id="url_with_id"><%= post.url_with_id %></dd>
+</dl>
diff --git a/spec/dummy/app/views/posts/show.html.erb b/spec/dummy/app/views/posts/show.html.erb
index 71a3653..83969c2 100644
--- a/spec/dummy/app/views/posts/show.html.erb
+++ b/spec/dummy/app/views/posts/show.html.erb
@@ -1,19 +1 @@
-<dl>
-  <dt>Environment:</dt>
-  <dd id="environment"><%= Rails.env %></dd>
-
-  <dt>Posted:</dt>
-  <dd id="posted_date"><%= @post.posted_date %></dd>
-
-  <dt>Path with model:</dt>
-  <dd id="path_with_model"><%= @post.path_with_model %></dd>
-
-  <dt>Path with id:</dt>
-  <dd id="path_with_id"><%= @post.path_with_id %></dd>
-
-  <dt>URL with model:</dt>
-  <dd id="url_with_model"><%= @post.url_with_model %></dd>
-
-  <dt>URL with id:</dt>
-  <dd id="url_with_id"><%= @post.url_with_id %></dd>
-</dl>
+<%= render @post %>
diff --git a/spec/dummy/config/application.rb b/spec/dummy/config/application.rb
index 26eda12..6c219a8 100644
--- a/spec/dummy/config/application.rb
+++ b/spec/dummy/config/application.rb
@@ -54,6 +54,11 @@ module Dummy
 
     # Version of your assets, change this if you want to expire all your assets
     config.assets.version = '1.0'
+
+    # Tell Action Mailer not to deliver emails to the real world.
+    # The :test delivery method accumulates sent emails in the
+    # ActionMailer::Base.deliveries array.
+    config.action_mailer.delivery_method = :test
   end
 end
 
diff --git a/spec/dummy/config/environments/development.rb b/spec/dummy/config/environments/development.rb
index 82c74d1..e58bfbb 100644
--- a/spec/dummy/config/environments/development.rb
+++ b/spec/dummy/config/environments/development.rb
@@ -13,9 +13,6 @@ Dummy::Application.configure do
   config.consider_all_requests_local       = true
   config.action_controller.perform_caching = false
 
-  # Don't care if the mailer can't send
-  config.action_mailer.raise_delivery_errors = false
-
   # Print deprecation notices to the Rails logger
   config.active_support.deprecation = :log
 
diff --git a/spec/dummy/config/environments/production.rb b/spec/dummy/config/environments/production.rb
index 5ce2e0f..238a57d 100644
--- a/spec/dummy/config/environments/production.rb
+++ b/spec/dummy/config/environments/production.rb
@@ -39,9 +39,6 @@ Dummy::Application.configure do
   # Precompile additional assets (application.js, application.css, and all non-JS/CSS are already added)
   # config.assets.precompile += %w( search.js )
 
-  # Disable delivery errors, bad email addresses will be ignored
-  # config.action_mailer.raise_delivery_errors = false
-
   # Enable threaded mode
   # config.threadsafe!
 
diff --git a/spec/dummy/config/environments/test.rb b/spec/dummy/config/environments/test.rb
index f1a4814..0adb49d 100644
--- a/spec/dummy/config/environments/test.rb
+++ b/spec/dummy/config/environments/test.rb
@@ -24,11 +24,6 @@ Dummy::Application.configure do
   # Disable request forgery protection in test environment
   config.action_controller.allow_forgery_protection    = false
 
-  # Tell Action Mailer not to deliver emails to the real world.
-  # The :test delivery method accumulates sent emails in the
-  # ActionMailer::Base.deliveries array.
-  config.action_mailer.delivery_method = :test
-
   # Raise exception on mass assignment protection for Active Record models
   config.active_record.mass_assignment_sanitizer = :strict
 
diff --git a/spec/dummy/config/routes.rb b/spec/dummy/config/routes.rb
index 4c10f8f..a01f682 100644
--- a/spec/dummy/config/routes.rb
+++ b/spec/dummy/config/routes.rb
@@ -1,5 +1,7 @@
 Dummy::Application.routes.draw do
   scope "(:locale)", locale: /en|zh/ do
-    resources :posts, only: [:show]
+    resources :posts, only: [:show] do
+      get "mail", on: :member
+    end
   end
 end
diff --git a/spec/dummy/spec/mailers/post_mailer_spec.rb b/spec/dummy/spec/mailers/post_mailer_spec.rb
new file mode 100644
index 0000000..2e435ba
--- /dev/null
+++ b/spec/dummy/spec/mailers/post_mailer_spec.rb
@@ -0,0 +1,29 @@
+require 'spec_helper'
+
+describe PostMailer do
+  describe "#decorated_email" do
+    subject { Capybara.string(email.body.to_s) }
+    let(:email) { PostMailer.decorated_email(post).deliver }
+    let(:post) { Post.create }
+
+    it "decorates" do
+      subject.should have_content "Today"
+    end
+
+    it "can use path helpers with a model" do
+      subject.should have_css "#path_with_model", text: "/en/posts/#{post.id}"
+    end
+
+    it "can use path helpers with an id" do
+      subject.should have_css "#path_with_id", text: "/en/posts/#{post.id}"
+    end
+
+    it "can use url helpers with a model" do
+      subject.should have_css "#url_with_model", text: "http://www.example.com/en/posts/#{post.id}"
+    end
+
+    it "can use url helpers with an id" do
+      subject.should have_css "#url_with_id", text: "http://www.example.com/en/posts/#{post.id}"
+    end
+  end
+end
diff --git a/spec/integration/integration_spec.rb b/spec/integration/integration_spec.rb
index 62e3a64..e6a8ee4 100644
--- a/spec/integration/integration_spec.rb
+++ b/spec/integration/integration_spec.rb
@@ -1,48 +1,49 @@
 require 'spec_helper'
 require 'support/dummy_app'
 
+shared_examples_for "a decorator in a view" do
+  it "works" do
+    # it runs in the correct environment
+    page.should have_css "#environment", text: environment
+
+    # it can use path helpers with a model
+    page.should have_css "#path_with_model", text: "/en/posts/1"
+
+    # it can use path helpers with an id
+    page.should have_css "#path_with_id", text: "/en/posts/1"
+
+    # it can use url helpers with a model
+    page.should have_css "#url_with_model", text: "http://www.example.com/en/posts/1"
+
+    # it can use url helpers with an id
+    page.should have_css "#url_with_id", text: "http://www.example.com/en/posts/1"
+  end
+end
+
 describe "integration" do
   include Capybara::DSL
 
-  environment = ENV["RAILS_ENV"].to_s
-  raise ArgumentError, "RAILS_ENV must be development or production" unless ["development", "production"].include?(environment)
+  rails_env = ENV["RAILS_ENV"].to_s
+  raise ArgumentError, "RAILS_ENV must be development or production" unless ["development", "production"].include?(rails_env)
 
-  app = DummyApp.new(environment)
+  app = DummyApp.new(rails_env)
 
   app.start_server do
-    describe "in #{environment}" do
+    describe "in #{rails_env}" do
+      let(:environment) { rails_env }
       before { Capybara.app_host = app.url }
 
-      it "runs in the correct environment" do
-        visit("/posts/1")
-        page.should have_css "#environment", text: environment
+      context "in a view" do
+        before { visit("/posts/1") }
+
+        it_behaves_like "a decorator in a view"
       end
 
-      it "decorates" do
-        visit("/posts/1")
-        page.should have_content "Today"
-      end
+      context "in a mailer" do
+        before { visit("/posts/1/mail") }
 
-      it "can use path helpers with a model" do
-        visit("/posts/1")
-        page.should have_css "#path_with_model", text: "/en/posts/1"
+        it_behaves_like "a decorator in a view"
       end
-
-      it "can use path helpers with an id" do
-        visit("/posts/1")
-        page.should have_css "#path_with_id", text: "/en/posts/1"
-      end
-
-      it "can use url helpers with a model" do
-        visit("/posts/1")
-        page.should have_css "#url_with_model", text: "http://www.example.com/en/posts/1"
-      end
-
-      it "can use url helpers with an id" do
-        visit("/posts/1")
-        page.should have_css "#url_with_id", text: "http://www.example.com/en/posts/1"
-      end
-
     end
   end