text: import shutil
  import tempfile
  
  import os
  import pytest
  
  from factors import LifeTable
  
  
  @pytest.yield_fixture(autouse=True)
  def guaranteed_temp_folder_for_each_test():
      """Make sure that each test runs in a temporary directory."""
      cwd = os.getcwd()  # store the current working directory
      temp_dir = tempfile.mkdtemp()  # create a temp dir
      os.chdir(temp_dir)  # cd into the temp dir
      yield  # let the test run
  
      os.chdir(cwd)  # cd back into the original working directory
      shutil.rmtree(temp_dir)  # destroy the temp dir
  
  
  @pytest.fixture(scope="session")
  def aegon_table():
      return LifeTable("AEG2011")
  
  
  @pytest.fixture(scope="session")
  def ag_table():
      return LifeTable("AG2014")
  