old_contents: import unittest
  
  import os
  import ruamel.yaml as yaml
  from pymatgen import SETTINGS_FILE, _load_pmg_settings, get_structure_from_mp, \
      SETTINGS, loadfn
  from pymatgen import Structure
  from pymatgen.io.vasp import Vasprun
  import warnings
  
  test_dir = os.path.join(os.path.dirname(__file__), "..", "..", 'test_files')
  
  
  class SettingsTestCase(unittest.TestCase):
  
      def test_something(self):
          SETTINGS = _load_pmg_settings()
          if os.path.exists(SETTINGS_FILE):
              with open(SETTINGS_FILE, "rt") as f:
                  d = yaml.safe_load(f)
                  for k, v in d.items():
                      self.assertEqual(v, SETTINGS[k])
          else:
              for k, v in SETTINGS.items():
                  self.assertEqual(v, os.environ.get(k))
  
      @unittest.skipIf(not SETTINGS.get("PMG_MAPI_KEY"),
                       "PMG_MAPI_KEY environment variable not set.")
      def test_get_structure_from_mp(self):
          with warnings.catch_warnings():
              warnings.simplefilter("ignore")
              self.assertEqual(get_structure_from_mp("Li2O").formula, "Li2 O1")
              self.assertRaises(ValueError, get_structure_from_mp, "LiNaKCs")
  
      def test_loadfn(self):
          with warnings.catch_warnings():
              warnings.simplefilter("ignore")
              obj = loadfn(os.path.join(test_dir, "Li2O.cif"))
              self.assertIsInstance(obj, Structure)
              obj = loadfn(os.path.join(test_dir, "POSCAR"))
              self.assertIsInstance(obj, Structure)
              obj = loadfn(os.path.join(test_dir, "LiFePO4.vasp"))
              self.assertIsInstance(obj, Structure)
              obj = loadfn(os.path.join(test_dir, "vasprun.xml"))
              self.assertIsInstance(obj, Vasprun)
  
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: import unittest
  
  import os
  import ruamel.yaml as yaml
  from pymatgen import SETTINGS_FILE, _load_pmg_settings, get_structure_from_mp, \
      SETTINGS, loadfn
  from pymatgen import Structure
  from pymatgen.io.vasp import Vasprun
  import warnings
  
  test_dir = os.path.join(os.path.dirname(__file__), "..", "..", 'test_files')
  
  
  class SettingsTestCase(unittest.TestCase):
  
      # def test_something(self):
      #     SETTINGS = _load_pmg_settings()
      #     if os.path.exists(SETTINGS_FILE):
      #         with open(SETTINGS_FILE, "rt") as f:
      #             d = yaml.safe_load(f)
      #             for k, v in d.items():
      #                 self.assertEqual(v, SETTINGS[k])
      #     else:
      #         for k, v in SETTINGS.items():
      #             self.assertEqual(v, os.environ.get(k))
  
      @unittest.skipIf(not SETTINGS.get("PMG_MAPI_KEY"),
                       "PMG_MAPI_KEY environment variable not set.")
      def test_get_structure_from_mp(self):
          with warnings.catch_warnings():
              warnings.simplefilter("ignore")
              self.assertEqual(get_structure_from_mp("Li2O").formula, "Li2 O1")
              self.assertRaises(ValueError, get_structure_from_mp, "LiNaKCs")
  
      def test_loadfn(self):
          with warnings.catch_warnings():
              warnings.simplefilter("ignore")
              obj = loadfn(os.path.join(test_dir, "Li2O.cif"))
              self.assertIsInstance(obj, Structure)
              obj = loadfn(os.path.join(test_dir, "POSCAR"))
              self.assertIsInstance(obj, Structure)
              obj = loadfn(os.path.join(test_dir, "LiFePO4.vasp"))
              self.assertIsInstance(obj, Structure)
              obj = loadfn(os.path.join(test_dir, "vasprun.xml"))
              self.assertIsInstance(obj, Vasprun)
  
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Remove useless test.