require 'spec_helper' describe Emails::CreateService do let(:user) { create(:user) } let(:opts) { { email: 'new@email.com' } } subject(:service) { described_class.new(user, opts) } describe '#execute' do it 'creates an email with valid attributes' do expect { service.execute }.to change { Email.count }.by(1) expect(Email.where(opts)).not_to be_empty end it 'has the right user association' do service.execute expect(user.emails).to eq(Email.where(opts)) end end end