reflection_test.py 文件源码

def testSerializeUninitializedSubMessage(self):
    proto = unittest_pb2.TestRequiredForeign()

    # Sub-message doesn't exist yet, so this succeeds.
    proto.SerializeToString()

    proto.optional_message.a = 1
    self._CheckRaises(
        message.EncodeError,
        proto.SerializeToString,
        'Message protobuf_unittest.TestRequiredForeign '
        'is missing required fields: '
        'optional_message.b,optional_message.c')

    proto.optional_message.b = 2
    proto.optional_message.c = 3
    proto.SerializeToString()

    proto.repeated_message.add().a = 1
    proto.repeated_message.add().b = 2
    self._CheckRaises(
        message.EncodeError,
        proto.SerializeToString,
        'Message protobuf_unittest.TestRequiredForeign is missing required fields: '
        'repeated_message[0].b,repeated_message[0].c,'
        'repeated_message[1].a,repeated_message[1].c')

    proto.repeated_message[0].b = 2
    proto.repeated_message[0].c = 3
    proto.repeated_message[1].a = 1
    proto.repeated_message[1].c = 3
    proto.SerializeToString()