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

class GraphQL_SchemaTest < GraphQL::TestCase
  DESCRIBED_CLASS = unmapped_class(Rails::GraphQL::Schema)

  def test_gql_name
    assert_equal('__Schema', DESCRIBED_CLAS
    
  def test_namespace
    assert_equal(:base, DESCRIBED_CLASS.namespace)

    DESCRIBED_CLASS.stub_ivar(:@namespace, nil) do
      assert_equal(:base, DESCRIBED_CLASS.namespace)
    end

    DESCRIBED_CLASS.stub_ivar(:@namespace, 1) do
      assert_equal(1, DESCRIBED_CLASS.namespace)
    end

    DESCRIBED_CLASS.stub(:set_namespace, passthrough) do
      assert_equal(1, DESCRIBED_CLASS.namespace(1))
      assert_equal(2, DESCRIBED_CLASS.namespace(2, 3))
    end
  end