message_test.py 文件源码

def testMessageMapValidAfterFieldCleared(self):
    # Map needs to work even if field is cleared.
    # For the C++ implementation this tests the correctness of
    # ScalarMapContainer::Release()
    msg = map_unittest_pb2.TestMap()
    int32_foreign_message = msg.map_int32_foreign_message

    int32_foreign_message[2].c = 5

    msg.ClearField('map_int32_foreign_message')
    self.assertEqual(b'', msg.SerializeToString())
    self.assertTrue(2 in int32_foreign_message.keys())