def testMissingOpId(self):
    self._CreateTestOp(user_id=1, handler=self._OpMethod)
    user_op_mgr = self._CreateUserOpManager(user_id=1, handlers=[self._OpMethod], callback=self.stop)
    user_op_mgr.Execute(operation_id='unknown')
    self.wait()
    self.assertEqual(self._method_count, 1)
Ensure that email backend properly queue email messages.
dataset/ETHPy150Open viewfinderco/viewfinder/backend/db/test/op_manager_test.py/OpManagerTestCase.testMissingOpId--crossover with--dataset/ETHPy150Open ui/django-post_office/post_office/tests/test_backends.py/BackendTest.test_email_backend