Modular code in meteor -

i want write object oriented code in meteor using classes , objects. so, best way write object oriented code in meteor (both client , server)?

this article shows how make meteor project es6: http://info.meteor.com/blog/es2015-get-started

if use es6 methodology, should object orientated.

have read tutorials page on testing? https://www.meteor.com/tutorials/blaze/testing

and here more in-depth guide: https://guide.meteor.com/testing.html