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_yaml.rb
    path of file: ./repos/jruby/test/mri/psych
    
    the code of the file until where you have to start completion: # -*- coding: us-ascii; mode: ruby; ruby-indent-level: 4; tab-width: 4 -*-
# frozen_string_literal: true
#												vim:sw=4:ts=4
# $Id$
#
require_relative 'helper'
require 'ostruct'

# [ruby-core:01946]
module Psych_Tests
    StructTest = Struct::new( :c )
end

class Psych_Unit_Tests < Psych::TestCase
    def teardown
        Psych.domain_types.clear
    end

    def test_y_method
      assert_raise(NoMethodError) do
        OpenStruct.new.y 1
      end
    end

    def test_syck_compat
     
    
	def test_spec_sequence_key_shortcut
		# Shortcut sequence map
		assert_parse_only(
		  { 'invoice' => 34843, 'date' => Date.new( 2001, 1, 23 ),
		    'bill-to' => 'Chris Dumars', 'product' =>
			[ { 'item' => 'Super Hoop', 'quantity' => 1 },
			  { 'item' => 'Basketball', 'quantity' => 4 },
			  { 'item' => 'Big Shoes', 'quantity' => 1 } ] }, <<EOY
invoice: 34843
date   : 2001-01-23
bill-to: Chris Dumars
product:
  - item    : Super Hoop
    quantity: 1
  - item    : Basketball
    quantity: 4
  - item    : Big Shoes
    quantity: 1
EOY
		)
	end