Test for broken deletes on habtm relations in Mongoid.

Gemfile

source "http://rubygems.org"

# Test passes with version 2.2.3
# gem "mongoid", "2.2.3"

# Test fails with version 2.3.2
gem "mongoid", "2.3.2"

test.rb

require "rubygems"
require "bundler/setup"
require "mongoid"
require "minitest/spec"
require 'minitest/autorun'

Mongoid.configure do |config|
  config.skip_version_check = true
  config.database = Mongo::Connection.new.db("mongoid_sandbox")
end

class Person
  include Mongoid::Document
  has_and_belongs_to_many :companies
end

class Company
  include Mongoid::Document
  has_and_belongs_to_many :people
end

describe "mongoid habtm" do
  before do
    @jim      = Person.create
    @busyconf = Company.create
    @busyconf.people << @jim
    @busyconf.reload
    assert_equal 1, @busyconf.people.count
  end

  # This test fails in Mongoid 2.3
  it "should handle appends/deletes properly" do
    @busyconf.people.delete(@jim)
    @busyconf.reload
    assert_equal 0, @busyconf.people.count
  end

  # This test passes in Mongoid 2.3
  it "should not be affected by this" do
    @busyconf.people.load_all! # <== this is the only difference from the previous test.
    @busyconf.people.delete(@jim)
    @busyconf.reload
    assert_equal 0, @busyconf.people.count
  end
end