CODEWITHSUNDEEP
ruby-on-railsunit-testing
scottd
scottd

Reputation: 7474

How to test Controller Filters in Ruby on Rails and Test::Unit

We have a large application in Ruby on Rails with many filters. Some of these filters can be complex. I am looking for a way to individually test these filters with a unit test. Right now I test them by testing them through an action that uses them with a functional test. This just doesn't feel like the right way.
Does anyone have advice or experience with this?

Upvotes: 1

Views: 4507

Answers (6)

Bruno Mucelini Mergen
Bruno Mucelini Mergen

Reputation: 301

You can testing with this code:

require "test_helper"
describe ApplicationController do

  context 'ensure_manually_set_password' do
    setup do
      class ::TestingController < ApplicationController
        def hello
          render :nothing => true
        end
      end

      NameYourApp::Application.routes.draw do 
        get 'hello', to: 'testing#hello', as: :hello
      end
    end

    after do
        Rails.application.reload_routes!
    end

    teardown do
      Object.send(:remove_const, :TestingController)
    end

    context 'when user is logged in' do
      setup do
        @controller = TestingController.new
      end

      context 'and user has not manually set their password' do
        let(:user) { FactoryGirl.build(:user, manually_set_password: false) }
        setup do
                    login_as user
          get :hello
        end

        should 'redirect user to set their password' do
          assert_redirected_to new_password_path(user.password_token)
        end
      end
    end
  end
end

It's code is original from http://robots.thoughtbot.com/testing-a-before-filter, I changed for Rails 3

Upvotes: 1

jonnii
jonnii

Reputation: 28332

It depends on what your filters are doing.

This: http://movesonrails.com/journal/2008/1/23/testing-your-application-controller-with-rspec.html

And also learning how to use mocha will get you a long way.

Upvotes: 0

John Hinnegan
John Hinnegan

Reputation: 5962

I've come across this issue.

What about filters that perform actions requiring a request. i.e. using Flash

Example being Authlogic require_user method won't work just by using ApplicationController.new.send(:some_filter).

https://github.com/binarylogic/authlogic_example/blob/master/app/controllers/application_controller.rb

Anyone have some non-hack ideas on how to test this kind of thing in isolation? (I'm doing it by creating a extra dummy controller that I only use for testing.)

Upvotes: 0

Sohan
Sohan

Reputation:

I have a post on unit testing before_filters easily, you may wish to take a look. Hope it will help.

Upvotes: 1

scottd
scottd

Reputation: 7474

Orion I have messed with doing that in a few occurrences. Also, most of the time filters are private so you have to do a send:

SomeController.new.send(:some_filter)

Upvotes: 0

Orion Edwards
Orion Edwards

Reputation: 123662

Remember a filter is just a method.
Given this:

class SomeController
  before_filter :ensure_awesomeness

  ...
end

There's no reason you can't just do this:

SomeController.new.ensure_awesomeness

and then check that it calls redirect_to or whatever it's supposed to do

Upvotes: 3

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