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: signature_symbol_provider_test.rb
    path of file: ./repos/steep/test
    
    the code of the file until where you have to start completion: require_relative "test_helper"

class SignatureSymbolProviderTest < Minitest::Test
  include TestHelper
  include FactoryHelper
  include ShellHelper

  include Steep

  LSP = LanguageServer::Protocol
  SignatureSymbolProvider = Index::SignatureSymbolProvider
  RBSIndex = Index::RBSIndex

  def dirs
    @dirs ||= []
  end

  def assignment
    Services::PathAssignment.all
  end

  def test_find_class_symbol
    in_tmpdir do
    
  def test_find_class_symbol
    in_tmpdir do
      project = Project.new(steepfile_path: current_dir + "Steepfile")
      Project::DSL.parse(project, <<EOF)
target :lib do
  check "lib"
  signature "sig"
end
EOF

      service = Services::SignatureService.load_from(project.targets[0].new_env_loader(project: project))
      service.update(
        {
          Pathname("sig/a.rbs") => [Services::ContentChange.string(<<RBS)]
class Class1
  module Module1
    interface _Interface1
    end

    type alias1 = String
  end