Enable cache on checkout spec to test cache after checkout

spec/features/consumer/shopping/checkout_spec.rb

@@ -180,8 +180,19 @@ feature "As a consumer I want to check out my cart", js: true do
       end
     end
 
-    context "in the shopfront" do
+    context "in the shopfront with cache enabled" do
+      around do |example|
+        original_config = Spree::Config[:enable_products_cache?]
+        example.run
+        Spree::Config[:enable_products_cache?] = original_config
+      end
+
+      let(:control_product) { create(:taxed_product, supplier: supplier, price: 110, zone: zone, tax_rate_amount: 0.1) }
+      let(:control_variant) { control_product.variants.first }
+      let!(:order_cycle) { create(:simple_order_cycle, suppliers: [supplier], distributors: [distributor], coordinator: create(:distributor_enterprise), variants: [variant, control_variant]) }
+
       it "does not show item after all stock of an item is checked out (tesging cache update on checkout)" do
+        Spree::Config[:enable_products_cache?] = true
         variant.update_attributes on_hand: 5
         visit shop_path
 
@@ -200,7 +211,10 @@ feature "As a consumer I want to check out my cart", js: true do
         expect(page).to have_content "Your order has been processed successfully"
 
         visit shop_path
-        page.should_not have_content variant.product.name
+        # The presence of the control product ensures the list of products is fully loaded
+        #   before we verify the sold product is not present
+        page.should have_content control_product.name
+        page.should_not have_content product.name
       end
     end