Failure/Error: delete :destroy
ActionController::UrlGenerationError:
  No route matches {:controller=>"users", :action=>"destroy"}

it "should sign a user out" do
  test_sign_in(Factory(:user))
  delete :destroy
  expect(controller).to_not be_signed_in
  expect(response).to redirect_to(root_path)
end

controller.sign_in(user)

Prefix Verb   URI Pattern               Controller#Action
sessions_new GET    /sessions/new(.:format)   sessions#new
   users GET    /users(.:format)          users#index
         POST   /users(.:format)          users#create
new_user GET    /users/new(.:format)      users#new
edit_user GET    /users/:id/edit(.:format) users#edit
    user GET    /users/:id(.:format)      users#show
         PATCH  /users/:id(.:format)      users#update
         PUT    /users/:id(.:format)      users#update
         DELETE /users/:id(.:format)      users#destroy
sessions POST   /sessions(.:format)       sessions#create
new_session GET    /sessions/new(.:format)   sessions#new
 session DELETE /sessions/:id(.:format)   sessions#destroy
    root GET    /                         pages#home
 contact GET    /contact(.:format)        pages#contact
   about GET    /about(.:format)          pages#about
    help GET    /help(.:format)           pages#help
  signup GET    /signup(.:format)         users#new
  signin GET    /signin(.:format)         sessions#new
 signout GET    /signout(.:format)        sessions#destroy
pages_home GET    /pages/home(.:format)     pages#home

DELETE /users/:id(.:format)      users#destroy

DELETE /users/4

ActionController::UrlGenerationError: No route matches {:controller=>"users", :action=>"destroy"})

user = Factory(:user)
test_sign_in(user)
delete :destroy, id: user.id