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: test_ractor.rb
    path of file: ./repos/jruby/test/mri/pathname
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require "test/unit"
require "pathname"

class TestPathnameRactor < Test::Unit::TestCase
  def setup
    omit unle
    
  def test_ractor_shareable
    assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}")
    begin;
      $VERBOSE = nil
      require "pathname"
      r = Ractor.new Pathname("a") do |x|
        x.join(Pathname("b"), Pathname("c"))
      end
      assert_equal(Pathname("a/b/c"), r.take)
    end;
  end