How to use the crhelper.resource_helper.CfnResource function in crhelper

def test_wait_for_cwlogs(self):

        c = crhelper.resource_helper.CfnResource()
        c._context = MockContext
        s = Mock()
        c._wait_for_cwlogs(sleep=s)
        s.assert_not_called()
        MockContext.ms_remaining = 140000
        c._wait_for_cwlogs(sleep=s)
        s.assert_called_once()

def test_set_timeout(self):
        c = crhelper.resource_helper.CfnResource()
        c._context = MockContext()
        def func():
            return None

        c._set_timeout()
        t = threading.Timer(1000, func)
        self.assertEqual(type(t), type(c._timer))
        t.cancel()
        c._timer.cancel()

def test_wrappers(self):
        c = crhelper.resource_helper.CfnResource()

        def func():
            pass

        for f in ["create", "update", "delete", "poll_create", "poll_update", "poll_delete"]:
            self.assertEqual(None, getattr(c, "_%s_func" % f))
            getattr(c, f)(func)
            self.assertEqual(func, getattr(c, "_%s_func" % f))

def test_timeout(self, s):
        c = crhelper.resource_helper.CfnResource()
        c._timeout()
        s.assert_called_with('FAILED', "Execution timed out")

def test_cfn_response(self):
        c = crhelper.resource_helper.CfnResource()
        event = test_events['Create']
        c._send = Mock()

        orig_pid = c.PhysicalResourceId
        self.assertEqual(orig_pid, '')
        c._cfn_response(event)
        c._send.assert_called_once()
        print("RID: [%s]" % [c.PhysicalResourceId])
        self.assertEqual(True, c.PhysicalResourceId.startswith('test-stack-id_TestResourceId_'))

        c._send = Mock()
        c.PhysicalResourceId = 'testpid'
        c._cfn_response(event)
        c._send.assert_called_once()
        self.assertEqual('testpid', c.PhysicalResourceId)

def test_call(self, cfn_response_mock):
        c = crhelper.resource_helper.CfnResource()
        event = test_events["Create"]
        c.__call__(event, MockContext)
        self.assertTrue(c._send_response)
        cfn_response_mock.assert_called_once_with(event)

        c._sam_local = True
        c._poll_enabled = Mock(return_value=True)
        c._polling_init = Mock()
        c.__call__(event, MockContext)
        c._polling_init.assert_not_called()
        self.assertEqual(1, len(cfn_response_mock.call_args_list))

        c._sam_local = False
        c._send_response = False
        c.__call__(event, MockContext)
        c._polling_init.assert_called()

def test_cleanup_response(self):
        c = crhelper.resource_helper.CfnResource()
        c.Data = {"CrHelperPoll": 1, "CrHelperPermission": 2, "CrHelperRule": 3}
        c._cleanup_response()
        self.assertEqual({}, c.Data)

def test_setup_polling(self):
        c = crhelper.resource_helper.CfnResource()
        c._context = MockContext()
        c._event = test_events["Update"]
        c._lambda_client.add_permission = Mock()
        c._events_client.put_rule = Mock(return_value={"RuleArn": "arn:aws:lambda:blah:blah:function:blah/blah"})
        c._events_client.put_targets = Mock()
        c._setup_polling()
        c._events_client.put_targets.assert_called()
        c._events_client.put_rule.assert_called()
        c._lambda_client.add_permission.assert_called()