require 'rails_helper' RSpec.describe Device, type: :model do let(:device) { create(:device) } it { should validate_presence_of :unique_id } it { should validate_presence_of :model } it { should validate_uniqueness_of :unique_id } describe "after create" do it "generates an access token for the device" do expect(device.access_token).not_to be_nil end end end