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_gem_source_fetch_problem.rb
    path of file: ./repos/truffleruby/test/mri/tests/rubygems
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require_r
    
  def test_source_password_no_redacted
    source = Gem::Source.new "https://username:secret@gemsource.com"
    error  = RuntimeError.new "test"

    sf = Gem::SourceFetchProblem.new source, error
    sf.wordy

    assert_match "secret", source.uri.to_s
  end