class Bar
  include Mongoid::Document
  include Mongoid::Timestamps

  field :location, type: Array

  index :'location' => "2d"

  def self.run_test

    #error does not always show up in first iteration
    for i in 1..100
      Bar.delete_all
      puts "it number " + i.to_s

      for j in 1..100
        Bar.create(:location => [10,10])
      end

      test  = Bar.near(:'location' => [10,10]).order_by( :'created_at'.asc ).page(1).per(2)
      test1_ids = []
      test.each do |tst|
        test1_ids << tst.id
      end

      test2  = Bar.near(:'location' => [10,10]).order_by( :'created_at'.asc ).page(2).per(2)

      test2_ids = []
      test2.each do |tst|
        test2_ids << tst.id
      end

      if ( test1_ids & test2_ids ).length > 0
        raise "unexpected duplicate elements:" +  ( test1_ids & test2_ids ).to_json
      end


    end

  end
end