ruby on rails - Why are these tests not working? -

i ran problem , found this answer believe solve problem, can't work.

here's code:

setup   # hell put   def main_app     rails.application.class.routes.url_helpers   end   @routes = engine.routes end  test "should index"   :index   assert_response :success end 

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blaine@vm:~/sizzle-chisel$ rake test started run options --seed 60111  error["test_should_get_index", blog::admin::articlescontrollertest, 0.3109516409999742]  test_should_get_index#blog::admin::articlescontrollertest (0.31s) actionview::template::error:         actionview::template::error: undefined method `root_path' #<actiondispatch::routing:: routesproxy:0x00000006eda278> 

---

blog::engine.routes.draw   root "articles#index"    resources :articles    namespace :admin     resources :articles     root to: 'articles#index'   end end 

i keep getting root_path undefined, because within layout, there's code:

<%= link_to "some link", main_app.root_path %> 

my codebase rails engine... when run rake test, there no root_path defined on main_app.

first, can remove setup block.

and try with:

test "should index"   '/'   assert_response :success end 

root "articles#index" maps root(http://mywebsite.com) of website action index on articles controller.