new_contents: # Licensed under a 3-clause BSD style license - see LICENSE.rst
  
  """Test that all expected methods are present, before I/O tests import.
  
  This file is weirdly named so that it's the first test of I/O.
  """
  
  from astropy.cosmology.connect import convert_registry, readwrite_registry
  
  
  def test_expected_readwrite_io():
      """Test that ONLY the expected I/O is registered."""
  
      got = {k for k, _ in readwrite_registry._readers.keys()}
      expected = {"ascii.ecsv"}
  
      assert got == expected
  
  
  def test_expected_convert_io():
      """Test that ONLY the expected I/O is registered."""
  
      got = {k for k, _ in convert_registry._readers.keys()}
      expected = {"astropy.cosmology", "mapping", "astropy.model", "astropy.row",
                  "astropy.table", "yaml"}
  
      assert got == expected
  
subject: test to ensure all expected io is registered