使用RSpec测试父Rails应用程序时引擎的访问路径帮助器

Question

I have a Rails engine and a Rails 4 app that contains it. I want to write an RSpec test in the parent Rails app that verifies one of the Rails app's controllers redirects to a path inside the engine. When I run rake routes for my Rails app, I see the engine path I want, and it's named. I can refer to that path inside a view in my Rails app by saying my_engine.my_engine_path . However, my_engine doesn't seem to be a thing inside my Rails app's RSpec controller test. I don't want to do the following in my app's spec_helper.rb because that seems to clobber my app's routes with my engine's:

config.include Module.new {
  def self.included base
    base.routes { MyEngine::Engine.routes }
  end
}, type: :controller

When I do the following, I get undefined local variable or method 'my_engine' :

expect(response).to redirect_to(my_engine.my_engine_path(some_route_param))

Answer 1

My problem was in my routes. I was using a path parameter instead of id because the controller deals with files on the file system, not database records. I had resources :my_controller instead of resources :my_controller, param: :path, constraints: {path: /.*/} . So doing expect(response).to redirect_to(my_engine_path(some_route_param)) works fine in my app's RSpec controller test, no my_engine. prefix necessary.