Add test coverage for rake notes

Add separate tests to verify directories covered
Add tests to verify file_types

railties/test/application/rake/notes_test.rb

@@ -12,7 +12,8 @@ def teardown
         teardown_app
       end
 
-      test 'notes' do
+      test 'notes finds notes for certain file_types' do
+
         app_file "app/views/home/index.html.erb", "<% # TODO: note in erb %>"
         app_file "app/views/home/index.html.haml", "-# TODO: note in haml"
         app_file "app/views/home/index.html.slim", "/ TODO: note in slim"
@@ -50,6 +51,40 @@ def teardown
           end
         end
 
+      end
+      test 'notes finds notes in default directories' do
+
+        app_file "app/controllers/some_controller.rb", "# TODO: note in app directory"
+        app_file "config/initializers/some_initializer.rb", "# TODO: note in config directory"
+        app_file "lib/some_file.rb", "# TODO: note in lib directory"
+        app_file "script/run_something.rb", "# TODO: note in script directory"
+        app_file "test/some_test.rb", 1000.times.map { "" }.join("\n") << "# TODO: note in test directory"
+
+        boot_rails
+
+        require 'rake'
+        require 'rdoc/task'
+        require 'rake/testtask'
+
+        Rails.application.load_tasks
+
+        Dir.chdir(app_path) do
+          output = `bundle exec rake notes`
+          lines = output.scan(/\[([0-9\s]+)\]/).flatten
+
+          assert_match /note in app directory/, output
+          assert_match /note in config directory/, output
+          assert_match /note in lib directory/, output
+          assert_match /note in script directory/, output
+          assert_match /note in test directory/, output
+
+          assert_equal 5, lines.size
+
+          lines.each do |line_number|
+            assert_equal 4, line_number.size
+          end
+        end
+
       end
 
       private