active_model_serializers/test/serializers/serializer_for_test.rb

require 'test_helper'

module ActiveModel
  class Serializer
    class SerializerForTest < Minitest::Test
      def setup
        @array = [1, 2, 3]
        @previous_array_serializer = ActiveModel::Serializer.config.array_serializer
      end

      def teardown
        ActiveModel::Serializer.config.array_serializer = @previous_array_serializer
      end

      def test_serializer_for_array
        serializer = ActiveModel::Serializer.serializer_for(@array)
        assert_equal ActiveModel::Serializer.config.array_serializer, serializer
      end

      def test_overwritten_serializer_for_array
        new_array_serializer = Class.new
        ActiveModel::Serializer.config.array_serializer = new_array_serializer
        serializer = ActiveModel::Serializer.serializer_for(@array)
        assert_equal new_array_serializer, serializer
      end
    end
  end
end