why can't I raise Mongoid::Errors::DocumentNotFound in RSpec functional testing?

mongoid, rspec-rails, ruby-on-rails, ruby-on-rails-3.1

Solution

Mongoid's documentation for the exception shows it must be initialized. The corrected, working code is as follows:

require "spec_helper"

class SomeBogusClass; end

class ApplicationController < ActionController::Base

  rescue_from Mongoid::Errors::DocumentNotFound, :with => :access_denied

private

  def access_denied
    redirect_to "/401.html"
  end
end

describe ApplicationController do
  controller do
    def index
      raise Mongoid::Errors::DocumentNotFound.new SomeBogusClass, {}
    end
  end

  describe "handling AccessDenied exceptions" do
    it "redirects to the /401.html page" do
      get :index
      response.should redirect_to("/401.html")
    end
  end
end

Problem

I'm using rspec-rails (2.8.1) to functional test a rails 3.1 app using mongoid (3.4.7) for persistence. I'm trying test rescue_from for Mongoid::Errors::DocumentNotFound errors in my ApplicationController in the same way that the rspec-rails documentation for anonymous controllers suggests it could be done. But when I run the following test... ``` require "spec_helper" class ApplicationController < ActionController::Base rescue_from Mongoid::Errors::DocumentNotFound, :with => :access_denied private def access_denied redirect_to "/401.html" end end describe ApplicationController do controller do def index raise Mongoid::Errors::DocumentNotFound end end describe "handling AccessDenied exceptions" do it "redirects to the /401.html page" do get :index response.should redirect_to("/401.html") end end end ``` I get the following unexpected error ``` 1) ApplicationController handling AccessDenied exceptions redirects to the /401.html page Failure/Error: raise Mongoid::Errors::DocumentNotFound ArgumentError: wrong number of arguments (0 for 2) # ./spec/controllers/application_controller_spec.rb:18:in `exception' # ./spec/controllers/application_controller_spec.rb:18:in `raise' # ./spec/controllers/application_controller_spec.rb:18:in `index' # ./spec/controllers/application_controller_spec.rb:24:in `block (3 levels) in <top (required)>' ``` Why? How can I raise this mongoid error?

Original source