You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: until_executed_spec.rb
    path of file: ./repos/gitlabhq/spec/lib/gitlab/sidekiq_middleware/duplicate_jobs/strategies
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require 'spec_helper'

RS
    
      def perform_strategy_with_error
        expect do
          strategy.perform({}) do
            raise 'expected error'
          end
        end.to raise_error(RuntimeError, 'expected error')
      end
    end