Add example for default_url_options[:host] to generated mailers.

Signed-off-by: Joshua Peek <josh@joshpeek.com>

railties/lib/rails_generator/generators/components/mailer/templates/mailer.rb

@@ -1,4 +1,7 @@
 class <%= class_name %> < ActionMailer::Base
+  
+  # change to your domain name
+  default_url_options[:host] = 'example.com'
 <% for  action in actions -%>
 
   def <%= action %>(sent_at = Time.now)
@@ -7,7 +10,8 @@ class <%= class_name %> < ActionMailer::Base
     from       ''
     sent_on    sent_at
     
-    body       :action => '<%= action %>'
+    body       :greeting => 'Hi,'
   end
 <% end  -%>
+
 end

railties/test/generators/rails_mailer_generator_test.rb

@@ -13,10 +13,13 @@ class RailsMailerGeneratorTest < GeneratorTestCase
             "from       ''",
             "sent_on    sent_at",
             "",
-            "body       :action => 'reset_password'"
+            "body       :greeting => 'Hi,'"
           ],
           body.split("\n").map{|line| line.sub(' '*4, '') }
       end
+
+      assert_match /^  default_url_options\[:host\] = 'example.com'$/m, model,
+        'model should include default_url_options :host declaration'
     end
     
     assert_generated_views_for :notifier, 'reset_password.erb'