public void should_success_instantiate()
        {
            VBRequestDocumentModel model = new VBRequestDocumentModel();

            model.SetCurrency(1, "IDR", "Rp", 2, "description", "user", "userAgent");
            model.SetAmount(1, "user", "userAgent");
            model.SetPurpose("newPurpose", "user", "userAgent");
        }