RSpec.describe DeviseUserMailer, type: :mailer do
  let(:user) { create(:user) }
  let(:token) { SecureRandom.hex }
  describe '.confirmation_instructions' do
    subject { described_class.confirmation_instructions(user, token, opts = {}) }

    context 'without SafeMailer configured' do
      it { expect(subject[BalancerDeliveryMethod::FORCE_DELIVERY_METHOD_HEADER]&.value).to eq(nil) }
    end

    context 'with SafeMailer configured' do
      let(:forced_delivery_method) { :kikoo }
      before { allow(SafeMailer).to receive(:forced_delivery_method).and_return(forced_delivery_method) }
      it { expect(subject[BalancerDeliveryMethod::FORCE_DELIVERY_METHOD_HEADER]&.value).to eq(forced_delivery_method.to_s) }
    end

    context 'when perform_later is called' do
      it 'enqueues email in default queue for high priority delivery' do
  expect { subject.deliver_later }.to have_enqueued_job.on_queue(Rails.application.config.action_mailer.deliver_later_queue_name)
end
    end
  end
end