active_model_serializers/test/action_controller/serialization_test.rb

require 'test_helper'

module ActionController
  module Serialization
    class ImplicitSerializerTest < ActionController::TestCase
      class MyController < ActionController::Base
        def render_using_implicit_serializer
          render json: Profile.new({ name: 'Name 1', description: 'Description 1', comments: 'Comments 1' })
        end
      end

      tests MyController

      # We just have Null for now, this will change
      def test_render_using_implicit_serializer
        get :render_using_implicit_serializer

        assert_equal 'application/json', @response.content_type
        assert_equal '{"name":"Name 1","description":"Description 1"}', @response.body
      end
    end
  end
end