Rspec test for login user.CanCan

Question

I am trying to create rspec test for ability class. I successfully wrote the ability for the admin and testing this, but I don't know how write the test for the login user(login user can only update and destroy its own comments).

This is ability.rb:

    class Ability
      include CanCan::Ability

      def initialize(user)
        user ||= User.new
        if user.admin?
          can :manage, :all
        else
          can :read, :all
          can :create, :update, :destroy, Comment, user_id: user.id
        end
      end
    end

and this is ability_spec.rb:

    require 'rails_helper'
    require "cancan/matchers"

    describe Ability do
        it "user guest" do
            user = FactoryGirl.create(:user)
            ability = Ability.new(user)
            comment = Comment.new(user: user)
            expect(ability).to be_able_to(:read, comment)
        end

        it "user admin" do
            user = FactoryGirl.create(:user, role: 'admin')
            ability = Ability.new(user)
            comment = Comment.new(user: user)
            expect(ability).to be_able_to(:destroy, comment)
        end

Answer 1

Add this code in your spec_helper RSpec.configure.

RSpec.configure do |config|
  config.include Devise::TestHelpers, type: :controller
  ...
end

This is to use devise helper in your specs. like sign_in(user). So, for testing logged in user you can first sign the user like this

it "user admin" do
    user = FactoryGirl.create(:user, role: 'admin')
    sign_in(user)
    # your code to test update and destroy ability
end