def test_init_pathinfo(self):
     dir_set = site._init_pathinfo()
     for entry in [site.makepath(path)[1] for path in sys.path
                     if path and os.path.isdir(path)]:
         self.assertIn(entry, dir_set,
                       "%s from sys.path not found in set returned "
                       "by _init_pathinfo(): %s" % (entry, dir_set))

def iter_pth_paths(filename):
  """Given a .pth file, extract and yield all inner paths without honoring imports. This shadows
  python's site.py behavior, which is invoked at interpreter startup."""
  try:
    f = open(filename, 'rU')  # noqa
  except IOError:
    return

  dirname = os.path.dirname(filename)
  known_paths = set()

  with f:
    for line in f:
      line = line.rstrip()
      if not line or line.startswith('#'):
        continue
      elif line.startswith(('import ', 'import\t')):
        try:
          exec_function(line, globals_map={})
          continue
        except Exception:
          # NB: import lines are routinely abused with extra code appended using `;` so the class of
          # exceptions that might be raised in broader than ImportError. As such we cacth broadly
          # here.

          # Defer error handling to the higher level site.py logic invoked at startup.
          return
      else:
        extras_dir, extras_dir_case_insensitive = makepath(dirname, line)
        if extras_dir_case_insensitive not in known_paths and os.path.exists(extras_dir):
          yield extras_dir
          known_paths.add(extras_dir_case_insensitive)

def iter_pth_paths(filename):
  """Given a .pth file, extract and yield all inner paths without honoring imports. This shadows
  python's site.py behavior, which is invoked at interpreter startup."""
  try:
    f = open(filename, 'rU')  # noqa
  except IOError:
    return

  dirname = os.path.dirname(filename)
  known_paths = set()

  with f:
    for line in f:
      line = line.rstrip()
      if not line or line.startswith('#'):
        continue
      elif line.startswith(('import ', 'import\t')):
        try:
          exec_function(line)
          continue
        except Exception:
          # Defer error handling to the higher level site.py logic invoked at startup.
          return
      else:
        extras_dir, extras_dir_case_insensitive = makepath(dirname, line)
        if extras_dir_case_insensitive not in known_paths and os.path.exists(extras_dir):
          yield extras_dir
          known_paths.add(extras_dir_case_insensitive)

 def test_makepath(self):
     # Test makepath() have an absolute path for its first return value
     # and a case-normalized version of the absolute path for its
     # second value.
     path_parts = ("Beginning", "End")
     original_dir = os.path.join(*path_parts)
     abs_dir, norm_dir = site.makepath(*path_parts)
     self.assertEqual(os.path.abspath(original_dir), abs_dir)
     if original_dir == os.path.normcase(original_dir):
         self.assertEqual(abs_dir, norm_dir)
     else:
         self.assertEqual(os.path.normcase(abs_dir), norm_dir)