lib/faker/russian/inn.rb in faker-russian-0.0.3 vs lib/faker/russian/inn.rb in faker-russian-0.0.4

@@ -1,12 +1,10 @@
 module Faker
   module Russian
     module Inn
       def inn(options = {})
-        if (options.keys - [:sequence_number, :region_number, :kind]).any?
-          raise 'wrong options. just :kind, :region_number or :sequence_number'
-        end
+        options.assert_valid_keys(:sequence_number, :region_number, :kind)
 
         sequence = find_sequence(options[:sequence_number])
         region_number = find_region_number(options[:region_number], sequence)
         kind = find_kind(options[:kind], sequence)
         sequence_digits = find_digits(kind, sequence)
@@ -29,16 +27,16 @@
         (kind == :legal) ? sequence.rand(1_000_000..9_999_999).to_s : sequence.rand(10_000_000..99_999_999).to_s
       end
 
       def check_digit(digits)
         if digits.length == 9
-          calc(P10, digits)
+          calc_inn(P10, digits)
         else
-          calc(P11, digits) + calc(P12, digits + calc(P11, digits))
+          calc_inn(P11, digits) + calc_inn(P12, digits + calc_inn(P11, digits))
         end
       end
 
-      def calc(p, inn)
+      def calc_inn(p, inn)
         (p.each_with_index.inject(0){ |s, p| s + p[0] * inn[p[1]].to_i } % 11 % 10).to_s
       end
 
       P10 = [2, 4, 10, 3, 5, 9, 4, 6, 8]
       P11 = [7, 2, 4, 10, 3, 5, 9, 4, 6, 8]