require 'mongoid'
require 'rspec'

Mongoid.configure do |config|
  config.connect_to('mongoid_embedded_test')
end

class Post
  include Mongoid::Document

  embeds_many :comments
  embeds_many :tags
end

class Comment
  include Mongoid::Document

  field :content
  embedded_in :post
end

class Tag
  include Mongoid::Document

  field :content
  embedded_in :post
end

describe Post do
  let(:post) do
    Post.create!(
      comments: [Comment.new({content: 'comment 1'}), Comment.new({content: 'comment 2'})],
      tags: [Tag.new({content: 'tag 1'}), Tag.new({content: 'tag 2'})]
    )
  end

  it 'works' do
    post.tags = [Tag.new({content: 'tag 3'}), Tag.new({content: 'tag 4'})]
    post.assign_attributes(
      comments: [Comment.new({content: 'comment 3'}), Comment.new({content: 'comment 4'})],
    )
    post.save!

    fresh_post = Post.find(post.id)

    expect(fresh_post.tags.size).to eq(2)
    expect(fresh_post.comments.size).to eq(2)
  end

  it 'fails' do
    post.assign_attributes(
      comments: [Comment.new({content: 'comment 3'}), Comment.new({content: 'comment 4'})],
    )
    post.tags = [Tag.new({content: 'tag 3'}), Tag.new({content: 'tag 4'})]
    post.save!

    fresh_post = Post.find(post.id)

    expect(fresh_post.tags.size).to eq(2)
    expect(fresh_post.comments.size).to eq(2)
  end
end