Simulation race conditions using Threads

race_condition.rb

it 'does not allow multiple reservations on same spot' do
    wait_for_all_threads = true

    reservation_counter = ReservationCounterQuery.find_or_initialize_by_params(account, {
      schedule_id: schedule.id,
      date: Date.today.to_s
    })

    form1 = Reservation::SpotBooking::CreateForm.new(count: 1, reserved_spots: '1')
    form2 = Reservation::SpotBooking::CreateForm.new(count: 1, reserved_spots: '1')

    attributes = [
      {
        form: form1,
        credit: credit,
        user: user
      },
      {
        form: form2,
        credit: credit2,
        user: user2
      }
    ]

    threads = attributes.map do |attrs|
      Thread.new do
        true while wait_for_all_threads
        Reservation::Operations::SpotBooking::CreateSpotBooking.call(
          form: attrs[:form],
          deducted_credit: attrs[:credit],
          reservation_counter: reservation_counter,
          user: attrs[:user]
        )
      end
    end
    wait_for_all_threads = false
    threads.each(&:join)

    expect(reservation_counter.reservations.count).to eq(1)
  end