active_model_serializers/test/adapter/json_api/fields_test.rb

require 'test_helper'

module ActiveModel
  class Serializer
    module Adapter
      class JsonApi
        class FieldsTest < ActiveSupport::TestCase
          Post = Class.new(::Model)
          class PostSerializer < ActiveModel::Serializer
            type 'posts'
            attributes :title, :body
            belongs_to :author
            has_many :comments
          end

          Author = Class.new(::Model)
          class AuthorSerializer < ActiveModel::Serializer
            type 'authors'
            attributes :name, :birthday
          end

          Comment = Class.new(::Model)
          class CommentSerializer < ActiveModel::Serializer
            type 'comments'
            attributes :body
            belongs_to :author
          end

          def setup
            @author = Author.new(id: 1, name: 'Lucas', birthday: '10.01.1990')
            @comment1 = Comment.new(id: 7, body: 'cool', author: @author)
            @comment2 = Comment.new(id: 12, body: 'awesome', author: @author)
            @post = Post.new(id: 1337, title: 'Title 1', body: 'Body 1',
                             author: @author, comments: [@comment1, @comment2])
            @comment1.post = @post
            @comment2.post = @post
          end

          def test_fields_attributes
            fields = { posts: [:title] }
            hash = serializable(@post, adapter: :json_api, fields: fields).serializable_hash
            expected = {
              title: 'Title 1'
            }

            assert_equal(expected, hash[:data][:attributes])
          end

          def test_fields_relationships
            fields = { posts: [:author] }
            hash = serializable(@post, adapter: :json_api, fields: fields).serializable_hash
            expected = {
              author: {
                data: {
                  type: 'authors',
                  id: '1'
                }
              }
            }

            assert_equal(expected, hash[:data][:relationships])
          end

          def test_fields_included
            fields = { posts: [:author], comments: [:body] }
            hash = serializable(@post, adapter: :json_api, fields: fields, include: 'comments').serializable_hash
            expected = [
              {
                type: 'comments',
                id: '7',
                attributes: {
                  body: 'cool'
                }
              }, {
                type: 'comments',
                id: '12',
                attributes: {
                  body: 'awesome'
                }
              }
            ]

            assert_equal(expected, hash[:included])
          end
        end
      end
    end
  end
end