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: graphql_test.rb
    path of file: ./repos/rails-graphql/test
    
    the code of the file until where you have to start completion: require 'config'

class GraphQLTest < GraphQL::TestCase
  DESCRIBED_CLASS = Rails::GraphQL

  def test_type_map
    D
    
  def test_type_map
    DESCRIBED_CLASS.stub_cvar(:@@type_map, 1) do
      assert_equal(1, DESCRIBED_CLASS.type_map)
    end

    assert_instance_of(Rails::GraphQL::TypeMap, DESCRIBED_CLASS.type_map)
  end