require 'spec_helper' describe SerializerHelper, type: :helper do let(:serializer) do class ExampleEnterpriseSerializer < ActiveModel::Serializer attributes :id, :name end ExampleEnterpriseSerializer end describe "#required_attributes" do it "returns only the attributes from the model that the serializer needs to be queried" do required_attributes = helper.required_attributes Enterprise, serializer expect(required_attributes).to eq ['enterprises.id', 'enterprises.name'] end end end