active_model_serializers/test/adapter/fragment_cache_test.rb

require 'test_helper'
module ActiveModelSerializers
  module Adapter
    class FragmentCacheTest < ActiveSupport::TestCase
      TypedRoleSerializer = Class.new(ActiveModel::Serializer) do
        type 'my-roles'
        cache only: [:name], skip_digest: true
        attributes :id, :name, :description

        belongs_to :author
      end

      def setup
        super
        @spam            = Spam::UnrelatedLink.new(id: 'spam-id-1')
        @author          = Author.new(name: 'Joao M. D. Moura')
        @role            = Role.new(name: 'Great Author', description: nil)
        @role.author     = [@author]
        @role_serializer = RoleSerializer.new(@role)
        @spam_serializer = Spam::UnrelatedLinkSerializer.new(@spam)
        @role_hash       = FragmentCache.new(::ActiveModelSerializers::Adapter.configured_adapter.new(@role_serializer), @role_serializer, {})
        @spam_hash       = FragmentCache.new(::ActiveModelSerializers::Adapter.configured_adapter.new(@spam_serializer), @spam_serializer, {})
      end

      def test_fragment_fetch_with_virtual_attributes
        expected_result = {
          id: @role.id,
          description: @role.description,
          slug: "#{@role.name}-#{@role.id}",
          name: @role.name
        }
        assert_equal(@role_hash.fetch, expected_result)
      end

      def test_fragment_fetch_with_namespaced_object
        expected_result = {
          id: @spam.id
        }
        assert_equal(@spam_hash.fetch, expected_result)
      end

      def test_fragment_fetch_with_type_override
        serialization = serializable(Role.new(name: 'Another Author'), serializer: TypedRoleSerializer, adapter: :json_api).serializable_hash
        assert_equal(TypedRoleSerializer._type, serialization.fetch(:data).fetch(:type))
      end
    end
  end
end