assert_template depends on AV::Template monkey patches in action_view…

…/test_case

actionpack/lib/action_dispatch/testing/assertions/response.rb

@@ -2,6 +2,15 @@ module ActionDispatch
   module Assertions
     # A small suite of assertions that test responses from Rails applications.
     module ResponseAssertions
+      extend ActiveSupport::Concern
+
+      included do
+        # TODO: Need to pull in AV::Template monkey patches that track which
+        # templates are rendered. assert_template should probably be part
+        # of AV instead of AD.
+        require 'action_view/test_case'
+      end
+
       # Asserts that the response is one of the following types:
       #
       # * <tt>:success</tt>   - Status code was 200

railties/test/application/test_test.rb

@@ -23,6 +23,31 @@ def test_truth
       run_test 'unit/foo_test.rb'
     end
 
+    test "integration test" do
+      controller 'posts', <<-RUBY
+        class PostsController < ActionController::Base
+        end
+      RUBY
+
+      app_file 'app/views/posts/index.html.erb', <<-HTML
+        Posts#index
+      HTML
+
+      app_file 'test/integration/posts_test.rb', <<-RUBY
+        require 'test_helper'
+
+        class PostsTest < ActionController::IntegrationTest
+          def test_index
+            get '/posts'
+            assert_response :success
+            assert_template "index"
+          end
+        end
+      RUBY
+
+      run_test 'integration/posts_test.rb'
+    end
+
     private
       def run_test(name)
         result = ruby '-Itest', "#{app_path}/test/#{name}"