old_contents: import unittest
  import os
  
  from utils import create_sparse_tempfile
  from gi.repository import BlockDev
  if not BlockDev.is_initialized():
      BlockDev.init(None, None)
  
  class MpathTestCase(unittest.TestCase):
      def setUp(self):
          self.dev_file = create_sparse_tempfile("mpath_test", 1024**3)
          succ, loop = BlockDev.loop_setup(self.dev_file)
          if  not succ:
              raise RuntimeError("Failed to setup loop device for testing")
          self.loop_dev = "/dev/%s" % loop
  
      def test_is_mpath_member(self):
          """Verify that is_mpath_member works as expected"""
  
          # just test that some non-mpath is not reported as a multipath member
          # device and no error is reported
          self.assertFalse(BlockDev.mpath_is_mpath_member("/dev/loop0"))
  
      def tearDown(self):
          succ = BlockDev.loop_teardown(self.loop_dev)
          if  not succ:
              os.unlink(self.dev_file)
              raise RuntimeError("Failed to tear down loop device used for testing")
  
          os.unlink(self.dev_file)
  
new_contents: import unittest
  import os
  
  from utils import create_sparse_tempfile
  from gi.repository import BlockDev
  if not BlockDev.is_initialized():
      BlockDev.init(None, None)
  
  class MpathTestCase(unittest.TestCase):
      def setUp(self):
          self.dev_file = create_sparse_tempfile("mpath_test", 1024**3)
          succ, loop = BlockDev.loop_setup(self.dev_file)
          if  not succ:
              raise RuntimeError("Failed to setup loop device for testing")
          self.loop_dev = "/dev/%s" % loop
  
      def tearDown(self):
          succ = BlockDev.loop_teardown(self.loop_dev)
          if  not succ:
              os.unlink(self.dev_file)
              raise RuntimeError("Failed to tear down loop device used for testing")
  
          os.unlink(self.dev_file)
  
      def test_is_mpath_member(self):
          """Verify that is_mpath_member works as expected"""
  
          # just test that some non-mpath is not reported as a multipath member
          # device and no error is reported
          self.assertFalse(BlockDev.mpath_is_mpath_member("/dev/loop0"))
  
subject: Make the tearDown method of the mpath test case better visible