openfoodnetwork/spec/services/subscriptions_count_spec.rb

describe SubscriptionsCount do
  let(:oc1) { create(:simple_order_cycle) }
  let(:oc2) { create(:simple_order_cycle) }
  let(:subscriptions_count) { SubscriptionsCount.new(order_cycles) }

  describe "#for" do
    context "when the collection has not been set" do
      let(:order_cycles) { nil }
      it "returns 0" do
        expect(subscriptions_count.for(oc1.id)).to eq 0
      end
    end

    context "when the collection has been set" do
      let(:order_cycles) { OrderCycle.where(id: [oc1]) }
      let!(:po1) { create(:proxy_order, order_cycle: oc1) }
      let!(:po2) { create(:proxy_order, order_cycle: oc1) }
      let!(:po3) { create(:proxy_order, order_cycle: oc2) }

      context "but the requested id is not present in the list of order cycles provided" do
        it "returns 0" do
          # Note that po3 applies to oc2, but oc2 in not in the collection
          expect(subscriptions_count.for(oc2.id)).to eq 0
        end
      end

      context "and the requested id is present in the list of order cycles provided" do
        it "returns a count of active proxy orders associated with the requested order cycle" do
          expect(subscriptions_count.for(oc1.id)).to eq 2
        end
      end
    end
  end
end