Add test for code change introduced in this commit f20032f

1 files changed, 9 insertions, 0 deletions

diff --git a/activemodel/test/cases/serializers/json_serialization_test.rb b/activemodel/test/cases/serializers/json_serialization_test.rb
index bb5be8cdeb..fd4d068354 100644
--- a/activemodel/test/cases/serializers/json_serialization_test.rb
+++ b/activemodel/test/cases/serializers/json_serialization_test.rb
@@ -155,6 +155,15 @@ class JsonSerializationTest < ActiveModel::TestCase
     end
   end
 
+  test "as_json should keep the default order in the hash" do
+    json = @contact.as_json
+    keys = json.keys
+
+    %w(name age created_at awesome preferences).each_with_index do |field, index|
+      assert_equal keys.index(field), index
+    end
+  end
+
   test "from_json should work without a root (class attribute)" do
     json = @contact.to_json
     result = Contact.new.from_json(json)