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: stats_calculator_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 StatsCalculatorTest < Minitest::Test
  include TestHelper
  include ShellHelper
  include FactoryHelper
  include SubtypingHelper

  include Steep

  StatsCalculator = Services::StatsCalculator
  ContentChange = Services::ContentChange

  def dirs
    @dirs ||= []
  end

  def setup_project()
    i
    
  def test_stats_success
    setup_project() do |service|
      service.update_and_check(
        changes: {
          Pathname("lib/hello.rb") => [ContentChange.string(<<RUBY)]
1 + 2
(_ = 1) + 2
1 + ""
RUBY
        },
        assignment: Services::PathAssignment.all
      ) {}

      calculator = StatsCalculator.new(service: service)

      target = service.project.targets[0]

      calculator.calc_stats(target, file: service.source_files[Pathname("lib/hello.rb")]).tap do |stats|
        assert_instance_of StatsCalculator::SuccessStats, stats
        assert_equal :lib, stats.target.name
        assert_equal Pathname("lib/hello.rb"), stats.path
        assert_equal 1, stats.typed_calls_count
        assert_equal 1, stats.untyped_calls_count
        assert_equal 1, stats.typed_calls_count
      end
    end
  end