Update variant's quantity from DFC

engines/dfc_provider/app/controllers/dfc_provider/supplied_products_controller.rb

@@ -18,6 +18,11 @@ module DfcProvider
       variant.product.update!(
         description: dfc_request["dfc-b:description"],
       )
+
+      # This input is DFC v1.6 currently sent by the DFC Prototype.
+      variant.update!(
+        unit_value: dfc_request["dfc-b:quantity"],
+      )
     end
 
     private

engines/dfc_provider/spec/requests/supplied_products_spec.rb

@@ -51,6 +51,7 @@ describe "SuppliedProducts", type: :request do
         expect(response).to have_http_status :success
         variant.reload
       }.to change { variant.description }.to("DFC-Pesto updated")
+        .and change { variant.unit_value }.to(17)
     end
   end
 end

engines/dfc_provider/spec/support/patch_supplied_product.json

@@ -81,5 +81,5 @@
     }
   },
   "dfc-b:description": "DFC-Pesto updated",
-  "dfc-b:quantity": 0
+  "dfc-b:quantity": 17
 }