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_encodings.rb
    path of file: ./repos/jruby/test/mri/csv
    
    the code of the file until where you have to start completion: # -*- coding: utf-8 -*-
# frozen_string_literal: false

require_relative "helper"

class TestCSVEncodings < Test::Unit::TestCase
  extend DifferentOFS
  include Helper

  def setup
    super
    require 'tempfile'
    @temp_csv_file = Tempfile.new(%w"test_csv. .csv")
    @temp_csv_path = @temp_csv_file.path
    @temp_csv_file.close
  end

  def teardown
    @temp_csv_file.close!
    super
  end

  ########################################
  ### Hand Test Some Popular Encodings ###
  ########################################

  def test_parses_utf8_encoding
    assert_parses( [ %w[ one two … ],
                     %w[ 1   …   3 ],
                     %w[ …   5   6 ] ], "UTF-8" )
  end

  def test_parses_latin1_encoding
    assert_parses( [ %w[ one    two    Résumé ],
                     %w[ 1      Résumé 3      ],
                     %w[ Résumé 5      6      ] ], "ISO-8859-1" )
  end

  def test_parses_utf16be_encoding
    assert_parses( [ %w[ one two … ],
                     %w[ 1   …   3 ],
                     %w[ …   5   6 ] ], "UTF-16BE" )
  end

  def test_parses_shift_jis_encoding
    assert_parses( [ %w[ 一 二 三 ],
                     %w[ 四 五 六 ],
                     %w[ 七 八 九 ] ], "Shift_JIS" )
  end

  ###########################################################
  ### Try Simple Reading for All Non-dummy Ruby
    
  def assert_parses(fields, encoding, **options)
    encoding = Encoding.find(encoding) unless encoding.is_a? Encoding
    orig_fields = fields
    fields = encode_ary(fields, encoding)
    data = ary_to_data(fields, **options)
    parsed = CSV.parse(data, **options)
    assert_equal(fields, parsed)
    parsed.flatten.each_with_index do |field, i|
      assert_equal(encoding, field.encoding, "Field[#{i + 1}] was transcoded.")
    end
    File.open(@temp_csv_path, "wb") {|f| f.print(data)}
    CSV.open(@temp_csv_path, "rb:#{encoding}", **options) do |csv|
      csv.each_with_index do |row, i|
        assert_equal(fields[i], row)
      end
    end
    begin
      CSV.open(@temp_csv_path,
               "rb:#{encoding}:#{__ENCODING__}",
               **options) do |csv|
        csv.each_with_index do |row, i|
          assert_equal(orig_fields[i], row)
        end
      end unless encoding == __ENCODING__
    rescue Encoding::ConverterNotFoundError
    end
    options[:encoding] = encoding.name
    CSV.open(@temp_csv_path, **options) do |csv|
      csv.each_with_index do |row, i|
        assert_equal(fields[i], row)
      end
    end
    options.delete(:encoding)
    options[:external_encoding] = encoding.name
    options[:internal_encoding] = __ENCODING__.name
    begin
      CSV.open(@temp_csv_path, **options) do |csv|
        csv.each_with_index do |row, i|
          assert_equal(orig_fields[i], row)
        end
      end unless encoding == __ENCODING__
    rescue Encoding::ConverterNotFoundError
    end
  end