reflection_test.py 文件源码

def testPackedRepeatedScalars(self):
    self.assertEqual(0, self.packed_proto.ByteSize())

    self.packed_proto.packed_int32.append(10)   # 1 byte.
    self.packed_proto.packed_int32.append(128)  # 2 bytes.
    # The tag is 2 bytes (the field number is 90), and the varint
    # storing the length is 1 byte.
    int_size = 1 + 2 + 3
    self.assertEqual(int_size, self.packed_proto.ByteSize())

    self.packed_proto.packed_double.append(4.2)   # 8 bytes
    self.packed_proto.packed_double.append(3.25)  # 8 bytes
    # 2 more tag bytes, 1 more length byte.
    double_size = 8 + 8 + 3
    self.assertEqual(int_size+double_size, self.packed_proto.ByteSize())

    self.packed_proto.ClearField('packed_int32')
    self.assertEqual(double_size, self.packed_proto.ByteSize())