Exclude #usage_count of cancelled order promotions

This allows for a more accurate count of promotion/promotion_code usage

core/app/models/spree/promotion.rb

@@ -193,6 +193,7 @@ def usage_count(excluded_orders: [])
       Spree::Adjustment.promotion.
         eligible.
         in_completed_orders(excluded_orders: excluded_orders).
+        where(spree_orders: { id: Spree::Order.not_canceled }).
         where(source_id: actions).
         count(:order_id)
     end

core/app/models/spree/promotion_code.rb

@@ -31,6 +31,7 @@ def usage_count(excluded_orders: [])
     adjustments.
     eligible.
     in_completed_orders(excluded_orders: excluded_orders).
+    where(spree_orders: { id: Spree::Order.not_canceled }).
     count(:order_id)
   end
 

core/spec/models/spree/promotion_code_spec.rb

@@ -147,6 +147,11 @@
         before { order.adjustments.promotion.update_all(eligible: false) }
         it { is_expected.to eq 0 }
       end
+      context "and the order is canceled" do
+        before { order.cancel! }
+        it { is_expected.to eq 0 }
+        it { expect(order.state).to eq 'canceled' }
+      end
     end
   end
 

core/spec/models/spree/promotion_spec.rb

@@ -386,6 +386,11 @@
         before { order.adjustments.promotion.update_all(eligible: false) }
         it { is_expected.to eq 0 }
       end
+      context "and the order is canceled" do
+        before { order.cancel! }
+        it { is_expected.to eq 0 }
+        it { expect(order.state).to eq 'canceled' }
+      end
     end
   end