active_model_serializers/test/adapter/json_api/collection_test.rb

require 'test_helper'

module ActiveModel
  class Serializer
    module Adapter
      class JsonApi
        class CollectionTest < Minitest::Test
          def setup
            @author = Author.new(id: 1, name: 'Steve K.')
            @author.bio = nil
            @blog = Blog.new(id: 23, name: 'AMS Blog')
            @first_post = Post.new(id: 1, title: 'Hello!!', body: 'Hello, world!!')
            @second_post = Post.new(id: 2, title: 'New Post', body: 'Body')
            @first_post.comments = []
            @second_post.comments = []
            @first_post.blog = @blog
            @second_post.blog = nil
            @first_post.author = @author
            @second_post.author = @author
            @author.posts = [@first_post, @second_post]

            @serializer = CollectionSerializer.new([@first_post, @second_post])
            @adapter = ActiveModel::Serializer::Adapter::JsonApi.new(@serializer)
            ActionController::Base.cache_store.clear
          end

          def test_include_multiple_posts
            expected = [
              {
                id: '1',
                type: 'posts',
                attributes: {
                  title: 'Hello!!',
                  body: 'Hello, world!!'
                },
                relationships: {
                  comments: { data: [] },
                  blog: { data: { type: 'blogs', id: '999' } },
                  author: { data: { type: 'authors', id: '1' } }
                }
              },
              {
                id: '2',
                type: 'posts',
                attributes: {
                  title: 'New Post',
                  body: 'Body'
                },
                relationships: {
                  comments: { data: [] },
                  blog: { data: { type: 'blogs', id: '999' } },
                  author: { data: { type: 'authors', id: '1' } }
                }
              }
            ]

            assert_equal(expected, @adapter.serializable_hash[:data])
          end

          def test_limiting_fields
            actual = ActiveModel::SerializableResource.new(
              [@first_post, @second_post], adapter: :json_api,
                                           fields: { posts: %w(title comments blog author) })
                     .serializable_hash
            expected = [
              {
                id: '1',
                type: 'posts',
                attributes: {
                  title: 'Hello!!'
                },
                relationships: {
                  comments: { data: [] },
                  blog: { data: { type: 'blogs', id: '999' } },
                  author: { data: { type: 'authors', id: '1' } }
                }
              },
              {
                id: '2',
                type: 'posts',
                attributes: {
                  title: 'New Post'
                },
                relationships: {
                  comments: { data: [] },
                  blog: { data: { type: 'blogs', id: '999' } },
                  author: { data: { type: 'authors', id: '1' } }
                }
              }
            ]
            assert_equal(expected, actual[:data])
          end
        end
      end
    end
  end
end