Make edit order page work even if inventory_items dont have a corresponding line_item in the order

.rubocop_manual_todo.yml

@@ -181,7 +181,6 @@ Layout/LineLength:
   - spec/features/admin/image_settings_spec.rb
   - spec/features/admin/multilingual_spec.rb
   - spec/features/admin/order_cycles_spec.rb
-  - spec/features/admin/orders_spec.rb
   - spec/features/admin/overview_spec.rb
   - spec/features/admin/payment_method_spec.rb
   - spec/features/admin/product_import_spec.rb
@@ -468,7 +467,6 @@ Metrics/BlockLength:
   - spec/factories/shipping_method_factory.rb
   - spec/factories/subscription_factory.rb
   - spec/factories/variant_factory.rb
-  - spec/features/admin/orders_spec.rb
   - spec/features/consumer/shopping/embedded_shopfronts_spec.rb
   - spec/lib/open_food_network/group_buy_report_spec.rb
   - spec/models/tag_rule/discount_order_spec.rb

app/views/spree/admin/orders/_shipment_manifest.html.haml

@@ -1,5 +1,6 @@
 - shipment.manifest.each do |item|
   - line_item = order.find_line_item_by_variant(item.variant)
+  - break if line_item.blank?
 
   %tr.stock-item{ "data-item-quantity" => "#{item.quantity}" }
     %td.item-image

spec/features/admin/order_print_ticket_spec.rb

@@ -0,0 +1,93 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+feature '
+    As an administrator
+    I want to print a ticket for an order
+', js: true do
+  include AuthenticationWorkflow
+  include CheckoutHelper
+  include ActionView::Helpers::NumberHelper
+
+  context "as an enterprise manager" do
+    let!(:shipping_method) { create(:shipping_method, distributors: [distributor]) }
+    let!(:distributor) { create(:distributor_enterprise) }
+
+    let!(:order) do
+      create(:order_with_taxes, distributor: distributor, ship_address: create(:address),
+                                product_price: 110, tax_rate_amount: 0.1,
+                                tax_rate_name: "Tax 1").tap do |record|
+                                  Spree::TaxRate.adjust(record)
+                                  record.update_shipping_fees!
+                                end
+    end
+
+    before do
+      @enterprise_user = create_enterprise_user
+      @enterprise_user.enterprise_roles.build(enterprise: distributor).save
+
+      quick_login_as @enterprise_user
+
+      Spree::Config[:enable_receipt_printing?] = true
+    end
+
+    feature "viewing the edit page" do
+      scenario "can print an order's ticket" do
+        visit spree.edit_admin_order_path(order)
+
+        find("#links-dropdown .ofn-drop-down").click
+
+        ticket_window = window_opened_by do
+          within('#links-dropdown') do
+            click_link('Print Ticket')
+          end
+        end
+
+        within_window ticket_window do
+          accept_alert do
+            print_data = page.evaluate_script('printData');
+            elements_in_print_data = [
+              order.distributor.name,
+              order.distributor.address.address_part1,
+              order.distributor.address.address_part2,
+              order.distributor.contact.email, order.number,
+              line_items_in_print_data,
+              adjustments_in_print_data,
+              order.display_total.format(with_currency: false),
+              taxes_in_print_data,
+              display_checkout_total_less_tax(order).format(with_currency: false)
+            ]
+            expect(print_data.join).to include(*elements_in_print_data.flatten)
+          end
+        end
+      end
+
+      def line_items_in_print_data
+        order.line_items.map { |line_item|
+          [line_item.quantity.to_s,
+           line_item.product.name,
+           line_item.single_display_amount_with_adjustments.format(symbol: false,
+                                                                   with_currency: false),
+           line_item.display_amount_with_adjustments.format(symbol: false, with_currency: false)]
+        }
+      end
+
+      def adjustments_in_print_data
+        checkout_adjustments_for(order, exclude: [:line_item]).
+          reject { |a| a.amount == 0 }.
+          map do |adjustment|
+            [raw(adjustment.label),
+             display_adjustment_amount(adjustment).format(symbol: false, with_currency: false)]
+          end
+      end
+
+      def taxes_in_print_data
+        display_checkout_taxes_hash(order).map { |tax_rate, tax_value|
+          [tax_rate,
+           tax_value.format(with_currency: false)]
+        }
+      end
+    end
+  end
+end