openfoodnetwork/spec/controllers/payment_gateways/paypal_controller_spec.rb

# frozen_string_literal: true

require 'spec_helper'

RSpec.describe PaymentGateways::PaypalController do
  context '#cancel' do
    it 'redirects back to checkout' do
      expect(get(:cancel)).to redirect_to checkout_path
    end
  end

  context '#confirm' do
    let(:previous_order) { controller.current_order(true) }
    let(:payment_method) { create(:payment_method) }

    before do
      allow(previous_order).to receive(:complete?).and_return(true)
      allow(previous_order).to receive(:checkout_allowed?).and_return(true)
    end

    it 'resets the order' do
      post :confirm, params: { payment_method_id: payment_method.id }
      expect(controller.current_order).not_to eq(previous_order)
    end

    it 'sets the access token of the session' do
      post :confirm, params: { payment_method_id: payment_method.id }
      expect(session[:access_token]).to eq(controller.current_order.token)
    end

    context "when the order cycle has closed" do
      # previous_order (controller.current_order(true)) doesn't have order_cycle by default
      let(:order_cycle) { create(:simple_order_cycle, orders: [previous_order]) }
      let(:distributor) { previous_order.distributor }

      it "redirects to shopfront with message if order cycle is expired" do
        allow(controller).to receive(:current_distributor).and_return(distributor)
        expect(controller).to receive(:current_order_cycle).and_return(order_cycle)
        expect(controller).to receive(:current_order).and_return(previous_order).at_least(:once)
        expect(order_cycle).to receive(:closed?).and_return(true)
        expect(previous_order).not_to receive(:empty!)
        expect(previous_order).not_to receive(:assign_order_cycle!).with(nil)

        post :confirm, params: { payment_method_id: payment_method.id }

        message = "The order cycle you've selected has just closed. " \
                  "Please contact us to complete your order ##{previous_order.number}!"

        expect(response).to redirect_to shops_url
        expect(flash[:info]).to eq(message)
      end
    end

    context "if the stock ran out whilst the payment was being placed" do
      it "redirects to the details page with out of stock error" do
        mock_order_check_stock_service(controller.current_order)

        post(:confirm, params: { payment_method_id: payment_method.id })

        expect(response).to redirect_to checkout_step_path(step: :details)

        order = controller.current_order.reload

        # Order is in "cart" state and did not complete processing of the payment
        expect(order.state).to eq "cart"
        expect(order.payments.count).to eq 0
      end
    end

    context "when order completion fails" do
      before do
        allow(previous_order).to receive(:complete?).and_return(false)
      end

      it "redirects to checkout state path" do
        expect(post(:confirm, params: { payment_method_id: payment_method.id })).
          to redirect_to checkout_step_path(step: :payment)

        expect(flash[:error]).to eq(
          'Payment could not be processed, please check the details you entered'
        )
      end
    end
  end

  describe "#express" do
    let(:order) { create(:order_with_totals_and_distribution) }
    let(:response) { true }
    let(:provider_success_url) { "https://test.com/success" }
    let(:response_mock) { double(:response, success?: response, errors: [] ) }
    let(:provider_mock) {
      double(:provider, build_set_express_checkout: true,
                        set_express_checkout: response_mock,
                        express_checkout_url: provider_success_url)
    }

    before do
      allow(controller).to receive(:current_order) { order }
      allow(controller).to receive(:provider) { provider_mock }
      allow(controller).to receive(:express_checkout_request_details) { {} }
    end

    context "when processing is successful" do
      it "redirects to a success URL generated by the payment provider" do
        expect(post(:express)).to redirect_to provider_success_url
      end
    end

    context "when processing fails" do
      let(:response) { false }

      it "redirects to checkout_step_path with a flash error" do
        expect(post(:express)).to redirect_to checkout_step_path(:payment)
        expect(flash[:error]).to eq "PayPal failed. "
      end
    end

    context "when a SocketError is encountered during processing" do
      before do
        allow(response_mock).to receive(:success?).and_raise(SocketError)
      end

      it "redirects to checkout_step_path with a flash error" do
        expect(post(:express)).to redirect_to checkout_step_path(:payment)
        expect(flash[:error]).to eq "Could not connect to PayPal."
      end
    end

    context "when the order cycle has closed" do
      let(:order_cycle) { order.order_cycle }
      let(:distributor) { order.distributor }

      it "redirects to shopfront with message if order cycle is expired" do
        allow(controller).to receive(:current_distributor).and_return(distributor)
        expect(controller).to receive(:current_order_cycle).and_return(order_cycle)
        expect(controller).to receive(:current_order).and_return(order).at_least(:once)
        expect(order_cycle).to receive(:closed?).and_return(true)
        expect(order).not_to receive(:empty!)
        expect(order).not_to receive(:assign_order_cycle!).with(nil)

        post(:express)

        message = "The order cycle you've selected has just closed. " \
                  "Please contact us to complete your order ##{order.number}!"

        expect(response).to redirect_to shops_url
        expect(flash[:info]).to eq(message)
      end
    end

    context "when the stock ran out whilst the payment was being placed" do
      it "redirects to the details page with out of stock error" do
        mock_order_check_stock_service(controller.current_order)

        post(:express)

        expect(response).to redirect_to checkout_step_path(step: :details)
      end
    end
  end

  describe '#expire_current_order' do
    it 'empties the order_id of the session' do
      expect(session).to receive(:[]=).with(:order_id, nil)
      controller.__send__(:expire_current_order)
    end

    it 'resets the @current_order ivar' do
      controller.__send__(:expire_current_order)
      expect(controller.instance_variable_get(:@current_order)).to be_nil
    end
  end

  def mock_order_check_stock_service(order)
    check_stock_service_mock = instance_double(Orders::CheckStockService)
    expect(Orders::CheckStockService).to receive(:new).and_return(check_stock_service_mock)
    expect(check_stock_service_mock).to receive(:sufficient_stock?).and_return(false)
    expect(check_stock_service_mock).to receive(:update_line_items).and_return(order.variants)
  end
end