# File lib/deltacloud/drivers/ec2/ec2_mock_driver.rb, line 41
    def describe_instances(opts={})
      instances = load_fixtures_for(:instances)
      instances.each_with_index do |instance, i|
        instances[i] = update_delayed_state(instance)
        return [instance] if opts and opts[:id] and instance[:aws_instance_id].eql?(opts[:id])
      end
      update_fixtures_for(:instances, instances)
      instances
    end