lib/russianpost/barcode/international.rb in russianpost-0.6.0 vs lib/russianpost/barcode/international.rb in russianpost-0.7.0

@@ -1,16 +1,25 @@
 require 'russianpost/barcode/base'
+require 'iso3166_ru'
 
 module RussianPost
   module Barcode
     class International < Base
       WEIGHT_FACTORS = [8, 6, 4, 2, 3, 5, 9, 7, 0]
 
       def self.format
         /\A([A-Z]{2}\d{9}[A-Z]{2})\Z/
       end
 
+      def valid?
+        super && country_exists?
+      end
+
       private
+
+      def country_exists?
+        !Iso3166Ru.find_by(alpha2: barcode[-2..-1]).nil?
+      end
 
       def checkdigit
         checksum < 11 ? checksum % 10 : 5
       end