Simple way of testing ActiveModel Serializers

simple_serializer.rb

class SimpleSerializer < ActiveModel::Serializer
  attributes :name, :code
end

simple_serializer_spec.rb

require 'spec_helper'

describe SimpleSerializer do
  context "Object methods" do
    describe "#to_json" do
      it "generates correct JSON" do
        SimpleSerializer._attributes.keys.should == [:name, :code]
      end
    end
  end
end