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: twemoji_test.rb
    path of file: ./repos/twemoji/test
    
    the code of the file until where you have to start completion: require "test_helper"

class TwemojiTest < Mini
    
  def test_parse_option_unsupport_file_ext_gif
    exception = assert_raises RuntimeError do
      Twemoji.parse("I like chocolate :heart_eyes:!", file_ext: 'gif')
    end

    assert_equal "Unsupported file extension: gif", exception.message
  end