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_helper.rb
    path of file: ./repos/stackneveroverflow/vendor/bundle/ruby/2.3.0/gems/sass-3.4.24/test/sass/scss
    
    the code of the file until where you have to start completion: require File.dirname(__FILE__) + '/../../test_helper'
require 'sass/engine'

module ScssTestHelper
  def assert_parses(scss)
    assert_equal scss.rstrip, render(scss).rstrip
  end

  def assert_not_parses(expected, scss)
    raise "Template must include <err> where an error is expected" unless scss.include?("<err>")

    after, was = scss.split("<err>")
    line = after.count("\
    
  def assert_not_parses(expected, scss)
    raise "Template must include <err> where an error is expected" unless scss.include?("<err>")

    after, was = scss.split("<err>")
    line = after.count("\n") + 1

    after.gsub!(/\s*\n\s*$/, '')
    after.gsub!(/.*\n/, '')
    after = "..." + after[-15..-1] if after.size > 18

    was.gsub!(/^\s*\n\s*/, '')
    was.gsub!(/\n.*/, '')
    was = was[0...15] + "..." if was.size > 18

    to_render = scss.sub("<err>", "")
    render(to_render)
    assert(false, "Expected syntax error for:\n#{to_render}\n")
  rescue Sass::SyntaxError => err
    assert_equal("Invalid CSS after \"#{after}\": expected #{expected}, was \"#{was}\"",
      err.message)
    assert_equal line, err.sass_line
  end