Test Estimator#coordinator_options integration

This commit ensures that the simple coordinator and a custom estimator
work when custom coordinator options are passed in.

Co-authored-by: Noah Silvera <[email protected]>

core/app/models/spree/stock/estimator.rb

@@ -29,6 +29,8 @@ def shipping_rates(package, frontend_only = true)
 
       private
 
+      attr_reader :coordinator_options
+
       def choose_default_shipping_rate(shipping_rates)
         unless shipping_rates.empty?
           default_shipping_rate = Spree::Config.shipping_rate_selector_class.new(shipping_rates).find_default

core/spec/models/spree/stock/simple_coordinator_integration_spec.rb

@@ -233,4 +233,40 @@
       end
     end
   end
+
+  describe "passing custom coordinator options" do
+    subject {
+      Spree::Stock::SimpleCoordinator.new(order, coordinator_options:)
+    }
+
+    let(:coordinator_options) { {arbitrary_shipping_rates: [my_shipping_rate]} }
+    let(:order) { create :order_with_line_items }
+    let(:my_shipping_rate) { create(:shipping_method).shipping_rates.new }
+
+    it "uses coordinator options passed in to the simple coordinator to the stock estimator" do
+      MyEstimator = Class.new(Spree::Stock::Estimator) do
+        def shipping_rates(package, _frontend_only = true)
+          raise ShipmentRequired if package.shipment.nil?
+          raise OrderRequired if package.shipment.order.nil?
+
+          first_shipping_rate = coordinator_options[:arbitrary_shipping_rates]&.first
+
+          if first_shipping_rate
+            first_shipping_rate.selected = true
+            return [first_shipping_rate]
+          else
+            raise StandardError, "no shipping rate!"
+          end
+        end
+      end
+
+      original_estimator_class = Spree::Config.stock.estimator_class.to_s
+      Spree::Config.stock.estimator_class = MyEstimator.to_s
+
+      expect(subject.shipments.first.selected_shipping_rate)
+        .to eq my_shipping_rate
+    ensure
+      Spree::Config.stock.estimator_class = original_estimator_class
+    end
+  end
 end