def test_lock(self):
task_id = "test_lock_task_id"
threshold = 30
retval = EnforceSingleTask.lock(task_id, seconds_expire=threshold)
self.assertTrue(retval)
# Subsequent call should fail since it has been 'locked'
self.assertFalse(EnforceSingleTask.lock(task_id, seconds_expire=threshold))
