mongo_mapper_helper... instead of using spec_helper in models

gistfile1.rb

require 'mongo_mapper'

ENV["RAILS_ENV"] ||= 'test'

$LOAD_PATH.unshift ::File.dirname(__FILE__) + '/../'

MongoMapper.connection = Mongo::Connection.new("127.0.0.1", 27017, :pool_size => 5)
MongoMapper.database = 'testdb'

Dir['app/plugins/*.rb'].sort.each do |file|
  load file
end

Dir['app/models/*.rb'].sort.each do |file|
  File.read(file)[/^class (\w+)/]
  class_name = $1
  Kernel.autoload class_name.to_sym, file unless class_name.blank?
end