require 'abstract_unit' class ResponseBodyIsProcTest < ActionDispatch::IntegrationTest class TestController < ActionController::Base def test self.response_body = proc { |response, output| output.write 'Hello' } end end def test_simple_get with_test_route_set do assert_deprecated do get '/test' end assert_response :success assert_equal 'Hello', response.body end end private def with_test_route_set(options = {}) with_routing do |set| set.draw do match ':action', :to => ::ResponseBodyIsProcTest::TestController end @app = self.class.build_app(set) do |middleware| middleware.delete "ActionDispatch::ShowExceptions" end yield end end end