Killing fixtures in mailer before they kill me (they usually lead to very brittle tests).

railties/lib/generators/erb/controller/controller_generator.rb

@@ -11,7 +11,7 @@ def copy_view_files
 
         actions.each do |action|
           @action = action
-          @path = filename_with_extensions(File.join(base_path, action))
+          @path = File.join(base_path, filename_with_extensions(action))
           template filename_with_extensions(:view), @path
         end
       end

railties/lib/generators/test_unit/mailer/mailer_generator.rb

@@ -9,13 +9,6 @@ class MailerGenerator < Base
       def create_test_files
         template "functional_test.rb", File.join('test/functional', class_path, "#{file_name}_test.rb")
       end
-
-      def create_fixtures_files
-        actions.each do |action|
-          @action, @path = action, File.join(file_path, action)
-          template "fixture", File.join("test/fixtures", @path)
-        end
-      end
     end
   end
 end

railties/lib/generators/test_unit/mailer/templates/fixture

-<%= class_name %>#<%= @action %>
-
-Hi, find me in app/views/<%= @path %>

railties/lib/generators/test_unit/mailer/templates/functional_test.rb

@@ -3,12 +3,11 @@
 class <%= class_name %>Test < ActionMailer::TestCase
 <% for action in actions -%>
   test "<%= action %>" do
-    @expected.subject = <%= action.to_s.humanize.inspect %>
-    @expected.to      = "to@example.org"
-    @expected.from    = "from@example.com"
-    @expected.body    = read_fixture("<%= action %>")
-
-    assert_equal @expected, <%= class_name %>.<%= action %>
+    mail = <%= class_name %>.<%= action %>
+    assert_equal <%= action.to_s.humanize.inspect %>, mail.subject
+    assert_equal ["to@example.org"], mail.to
+    assert_equal ["from@example.com"], mail.from
+    assert_match "Hi, find me in app", mail.body.encoded
   end
 
 <% end -%>

railties/test/generators/mailer_generator_test.rb

@@ -28,9 +28,11 @@ def test_check_class_collision
 
   def test_invokes_default_test_framework
     run_generator
-    assert_file "test/functional/notifier_test.rb", /class NotifierTest < ActionMailer::TestCase/
-    assert_file "test/fixtures/notifier/foo", /app\/views\/notifier\/foo$/
-    assert_file "test/fixtures/notifier/bar", /app\/views\/notifier\/bar$/
+    assert_file "test/functional/notifier_test.rb" do |test|
+      assert_match /class NotifierTest < ActionMailer::TestCase/, test
+      assert_match /test "foo"/, test
+      assert_match /test "bar"/, test
+    end
   end
 
   def test_invokes_default_template_engine