add zone label

spec/factories/zone.rb

@@ -1,6 +1,14 @@
 FactoryBot.define do
   factory :zone do
     sequence(:acronym) { |n| "MA#{n}" }
-    sequence(:label) { |n| "Ministère de l'Education Populaire #{n}" }
+    transient do
+      labels { [{ designated_on: '1981-05-08', name: "Ministère de l'Education Populaire" }] }
+    end
+
+    after(:create) do |zone, evaluator|
+      evaluator.labels.each do |label|
+        zone.labels.create(designated_on: label[:designated_on], name: label[:name])
+      end
+    end
   end
 end