text: """
  Unit and regression test for the convert module of the molsysmt package.
  """
  
  # Import package, test suite, and other packages as needed
  import molsysmt as msm
  import numpy as np
  import os
  
  # Whole systems (selection='all' and frame_indices='all')
  
  # Selection
  def test_string_pdb_text_to_openmm_Topology():
      molsys = msm.convert(msm.demo['T4 lysozyme L99A']['181l.pdb'], to_form='string:pdb_text')
      molsys = msm.convert(molsys, to_form='openmm.Topology', selection='molecule_type=="protein"')
      is_composed_of = msm.is_composed_of(molsys, proteins=1)
      form = msm.get_form(molsys)
      assert ('openmm.Topology'==form) and (is_composed_of==True)
  
  ## Multiple outputs
  
  
  