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: return_value_spec.rb
    path of file: ./repos/ruby/spec/ruby/core/tracepoint
    
    the code of the file until where you have to start completion: require_relative '../../spec_helper'
require_relative 'fixtures/classes'

describe 'TracePoint#return_value' do
  def test; 
    
  def test; 'test' end

  it 'returns value from :return event' do
    trace_value = nil
    TracePoint.new(:return) { |tp|
      next unless TracePointSpec.target_thread?
      trace_value = tp.return_value
    }.enable do
      test
      trace_value.should == 'test'
    end
  end
end