require 'bundler/inline'
require 'logger'

gemfile do
  source "https://rubygems.org"

  gem "mongoid", "#{ENV["MONGOID_VERSION"] || '8.0.10'}"
  gem "debug", "~> 1.7"
  gem "rspec", require: "rspec/autorun"
end

require 'mongoid'

Mongoid.configure do |config|
  config.clients.default = {
    hosts: ['localhost:27017'],
    database: 'mongoid8_test',
  }
  config.log_level = :debug
end

puts Mongoid::VERSION


class Band
  include Mongoid::Document
  include Mongoid::Attributes::Dynamic

  field :name, type: String
  embeds_many :labels
end

class Label
  include Mongoid::Document
  include Mongoid::Timestamps::Updated::Short

  field :name, type: String

  embedded_in :band
end

Band.delete_all
Label.delete_all

describe Band do

  context "when trying to persist the empty list" do

    context "in an embeds_many relation" do

      # let(:band) { Band.create } # this seems to work
      let(:band) { Band.new }

      before do
        band.labels = []
        band.save!
      end

      let(:reloaded_band) { Band.collection.find(_id: band._id).first }

      it "persists the empty list" do
        expect(reloaded_band).to have_key(:labels)
        expect(reloaded_band[:labels]).to eq []
      end
    end

    context "using before_save callback" do

      let(:band) { Band.create }

      before do
        Band.before_save do
          self[:labels] ||= []
        end
      end

      let(:reloaded_band) { Band.collection.find(_id: band._id).first }

      it "persists the empty list" do
        expect(reloaded_band).to have_key(:labels)
        expect(reloaded_band[:labels]).to eq []
      end
    end
  end
end