openfoodnetwork/spec/requests/voucher_adjustments_spec.rb

# frozen_string_literal: true

require 'spec_helper'

RSpec.describe VoucherAdjustmentsController, type: :request do
  let(:user) { order.user }
  let(:address) { create(:address) }
  let(:distributor) { create(:distributor_enterprise, with_payment_and_shipping: true) }
  let(:order_cycle) { create(:order_cycle, distributors: [distributor]) }
  let(:exchange) { order_cycle.exchanges.outgoing.first }
  let!(:order) do
    create(
      :order_with_line_items,
      line_items_count: 1,
      distributor:,
      order_cycle:,
      bill_address: address,
      ship_address: address
    )
  end
  let(:shipping_method) { distributor.shipping_methods.first }
  let(:voucher) { create(:voucher_flat_rate, code: 'some_code', enterprise: distributor) }

  before do
    order.update!(created_by: user)

    order.select_shipping_method shipping_method.id
    Orders::WorkflowService.new(order).advance_to_payment

    sign_in user
  end

  describe "POST voucher_adjustments" do
    let(:params) { { order: { voucher_code: voucher.code } } }

    it "adds a voucher to the user's current order" do
      post("/voucher_adjustments", params:)

      expect(response).to be_successful
      expect(order.reload.voucher_adjustments.length).to eq(1)
    end

    context "when voucher doesn't exist" do
      let(:params) { { order: { voucher_code: "non_voucher" } } }

      it "returns 422 and an error message" do
        post("/voucher_adjustments", params:)

        expect(response).to be_unprocessable
        expect(flash[:error]).to match "Voucher code Not found"
      end
    end

    context "when adding fails" do
      it "returns 422 and an error message" do
        # Create a non valid adjustment
        bad_adjustment = build(:adjustment, label: nil)
        allow(voucher).to receive(:create_adjustment).and_return(bad_adjustment)
        allow(Voucher).to receive(:find_by).and_return(voucher)

        post("/voucher_adjustments", params:)

        expect(response).to be_unprocessable
        expect(flash[:error]).to match("Voucher code There was an error while adding the voucher")
      end
    end

    context "when the order has a payment and payment feed" do
      let(:payment_method) { create(:payment_method, calculator:) }
      let(:calculator) { Calculator::FlatPercentItemTotal.new(preferred_flat_percent: 10) }

      before do
        create(:payment, order:, payment_method:, amount: order.total)
      end

      it "removes existing payments" do
        expect do
          post "/voucher_adjustments", params:
        end.to change { order.reload.payments.count }.from(1).to(0)
      end

      it "removes existing payment fees" do
        expect do
          post "/voucher_adjustments", params:
        end.to change { order.reload.all_adjustments.payment_fee.count }.from(1).to(0)
      end
    end
  end

  describe "DELETE voucher_adjustments/:id" do
    let!(:adjustment) { voucher.create_adjustment(voucher.code, order) }

    it "deletes the voucher adjustment" do
      delete "/voucher_adjustments/#{adjustment.id}"

      expect(order.voucher_adjustments.reload.length).to eq(0)
    end

    it "render a success response" do
      delete "/voucher_adjustments/#{adjustment.id}"

      expect(response).to be_successful
    end

    context "when adjustment doesn't exist" do
      it "does nothing" do
        delete "/voucher_adjustments/-1"

        expect(order.voucher_adjustments.reload.length).to eq(1)
      end

      it "render a success response" do
        delete "/voucher_adjustments/-1"

        expect(response).to be_successful
      end
    end

    context "when tax excluded from price" do
      it "deletes all voucher adjustment" do
        # Add a tax adjustment
        adjustment_attributes = {
          amount: 2.00,
          originator: adjustment.originator,
          order:,
          label: "Tax #{adjustment.label}",
          mandatory: false,
          state: 'closed',
          tax_category: nil,
          included_tax: 0
        }
        order.adjustments.create(adjustment_attributes)

        delete "/voucher_adjustments/#{adjustment.id}"

        expect(order.voucher_adjustments.reload.length).to eq(0)
      end
    end
  end
end