Perform variant override scoping on product/variant by external class. Centralise this so we can load everything in one go.

spec/lib/open_food_network/scope_variant_to_hub_spec.rb

@@ -5,16 +5,17 @@ module OpenFoodNetwork
     let(:hub) { create(:distributor_enterprise) }
     let(:v)   { create(:variant, price: 11.11, count_on_hand: 1) }
     let(:vo)  { create(:variant_override, hub: hub, variant: v, price: 22.22, count_on_hand: 2) }
+    let(:scoper) { ScopeVariantToHub.new(hub) }
 
     describe "overriding price" do
       it "returns the overridden price when one is present" do
         vo
-        v.scope_to_hub hub
+        scoper.scope v
         v.price.should == 22.22
       end
 
       it "returns the variant's price otherwise" do
-        v.scope_to_hub hub
+        scoper.scope v
         v.price.should == 11.11
       end
     end
@@ -22,12 +23,12 @@ module OpenFoodNetwork
     describe "overriding price_in" do
       it "returns the overridden price when one is present" do
         vo
-        v.scope_to_hub hub
+        scoper.scope v
         v.price_in('AUD').amount.should == 22.22
       end
 
       it "returns the variant's price otherwise" do
-        v.scope_to_hub hub
+        scoper.scope v
         v.price_in('AUD').amount.should == 11.11
       end
     end
@@ -35,12 +36,12 @@ module OpenFoodNetwork
     describe "overriding stock levels" do
       it "returns the overridden stock level when one is present" do
         vo
-        v.scope_to_hub hub
+        scoper.scope v
         v.count_on_hand.should == 2
       end
 
       it "returns the variant's stock level otherwise" do
-        v.scope_to_hub hub
+        scoper.scope v
         v.count_on_hand.should == 1
       end
     end