Faker::Alphanumeric.alphanumeric determinism fix (#2996)

* Faker::Alphanumeric.alphanumeric determinism fix

* Faker::Alphanumeric.alphanumeric changes from PR feedback

Author: admtnnr

lib/faker.rb

@@ -249,6 +249,10 @@ def shuffle(list)
         list.shuffle(random: Faker::Config.random)
       end
 
+      def shuffle!(list)
+        list.shuffle!(random: Faker::Config.random)
+      end
+
       def rand(max = nil)
         if max.nil?
           Faker::Config.random.rand

lib/faker/default/alphanumeric.rb

@@ -60,7 +60,7 @@ def alphanumeric(number: 32, min_alpha: 0, min_numeric: 0)
         randoms = Array.new(random_count) { sample(ALPHANUMS) }
 
         combined = alphas + numbers + randoms
-        combined.shuffle.join
+        shuffle!(combined).join
       end
     end
   end

test/faker/default/test_alphanum.rb

@@ -48,4 +48,12 @@ def test_alphanumeric_with_min_numeric
 
     assert_operator numbers.compact.size, :>=, 4
   end
+
+  def test_alphanumeric_with_min_alpha_and_min_numeric
+    deterministically_verify -> { @tester.alphanumeric(number: 10, min_alpha: 5, min_numeric: 5) } do |alphanum|
+      assert_equal 10, alphanum.size
+      assert_equal 5, alphanum.scan(/[[:alpha:]]/).size
+      assert_equal 5, alphanum.scan(/[[:digit:]]/).size
+    end
+  end
 end