class WidgetTestCase(unittest.TestCase):  def setUp(self):    pass  def tearDown(self):    pass  def test_func(self):    self.assertEqual(exp1, exp2)    self.assertTrue(exp)    self.assertFalse(exp)    with self.assertRaises(ExcepType)        expif __name__ == "__main__":    unittest.main()def suite():    suite = unittest.TestSuite()    suite.addTest(WidgetTestCase('test_func'))    return suiteif __name__ == '__main__':    runner = unittest.TextTestRunner()    runner.run(suite())class TMTest(unittest.TestCase):    def setUp(self):        pass    def tearDown(self):        unittest.TestCase.tearDown(self)    @classmethod    def setUpClass(cls):        super(TMTest, cls).setUpClass()    @classmethod    def tearDownClass(cls):        super(TMTest, cls).tearDownClass()if __name__ == "__main__":    unittest.main()    if __name__ == "__main__":    suite = unittest.TestSuite()    suite.addTest(TMTest("test_delete_failed_when_tenant_bound_node"))    unittest.TextTestRunner().run(suite)if __name__ == "__main__":       test_case_dir = os.path.dirname(__file__)    suite = unittest.TestLoader().discover(test_case_dir, 'tm_test.py')    unittest.TextTestRunner(verbosity=2).run(suite)def test_all():    suite = unittest.TestLoader().loadTestsFromTestCase(TestUpgradeAppGroup)    unittest.TextTestRunner(verbosity=0).run(suite)def test_one_case(case_name):    suite = unittest.TestSuite()    suite.addTest(TestUpgradeAppGroup(case_name))    runner = unittest.TextTestRunner()    runner.run(suite)