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_io_console.rb
    path of file: ./repos/artichoke/artichoke-backend/vendor/ruby/test/io/console
    
    the code of the file until where you have to start completion: # frozen_string_literal: false
begin
  require 'io/console'
  require 'test/unit'
  require 'pty'
rescue LoadError
end

class TestIO_Console < Test::Unit::TestCase
  begin
    PATHS = $LOADED_FEATURES.grep(%r"/io/console(?:\.#{RbConfig::CONFIG['DLEXT']}|\.rb|/\w+\.rb)\z") {$`}
  rescue Encoding::CompatibilityError
    $stderr.puts "test_io_console.rb debug"
    $LOADED_FEATURES.each{|path| $stderr.puts [path, path.encoding].inspect}
    raise
  end
  PATHS.uniq!

  # FreeBSD
    
  def test_setecho2
    helper {|m, s|
      assert_send([s, :echo?])
      m.print "a\n"
      sleep 0.1
      s.print "b\n"
      sleep 0.1
      assert_equal("a\r\nb\r\n", m.gets + m.gets)
      assert_equal("a\n", s.gets)
      s.echo = false
      assert_not_send([s, :echo?])
      m.print "a\n"
      s.print "b\n"
      assert_equal("b\r\n", m.gets)
      assert_equal("a\n", s.gets)
      s.echo = true
      assert_send([s, :echo?])
      m.print "a\n"
      sleep 0.1
      s.print "b\n"
      sleep 0.1
      assert_equal("a\r\nb\r\n", m.gets + m.gets)
      assert_equal("a\n", s.gets)
    }
  end