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trezor-firmware/core/tests/test_protobuf.py
2020-07-24 14:09:31 +02:00

89 lines
2.8 KiB
Python

from common import *
import protobuf
from trezor.utils import BufferReader, BufferWriter
class Message(protobuf.MessageType):
def __init__(self, uint_field: int = 0, enum_field: int = 0) -> None:
self.sint_field = uint_field
self.enum_field = enum_field
@classmethod
def get_fields(cls):
return {
1: ("sint_field", protobuf.SVarintType, 0),
2: ("enum_field", protobuf.EnumType("t", (0, 5, 25)), 0),
}
def load_uvarint(data: bytes) -> int:
reader = BufferReader(data)
return protobuf.load_uvarint(reader)
def dump_uvarint(value: int) -> bytearray:
writer = BufferWriter(bytearray(16))
protobuf.dump_uvarint(writer, value)
return memoryview(writer.buffer)[:writer.offset]
class TestProtobuf(unittest.TestCase):
def test_dump_uvarint(self):
self.assertEqual(dump_uvarint(0), b"\x00")
self.assertEqual(dump_uvarint(1), b"\x01")
self.assertEqual(dump_uvarint(0xFF), b"\xff\x01")
self.assertEqual(dump_uvarint(123456), b"\xc0\xc4\x07")
with self.assertRaises(ValueError):
dump_uvarint(-1)
def test_load_uvarint(self):
self.assertEqual(load_uvarint(b"\x00"), 0)
self.assertEqual(load_uvarint(b"\x01"), 1)
self.assertEqual(load_uvarint(b"\xff\x01"), 0xFF)
self.assertEqual(load_uvarint(b"\xc0\xc4\x07"), 123456)
def test_sint_uint(self):
self.assertEqual(protobuf.uint_to_sint(0), 0)
self.assertEqual(protobuf.sint_to_uint(0), 0)
self.assertEqual(protobuf.sint_to_uint(-1), 1)
self.assertEqual(protobuf.sint_to_uint(1), 2)
self.assertEqual(protobuf.uint_to_sint(1), -1)
self.assertEqual(protobuf.uint_to_sint(2), 1)
# roundtrip:
self.assertEqual(
protobuf.uint_to_sint(protobuf.sint_to_uint(1234567891011)), 1234567891011
)
self.assertEqual(
protobuf.uint_to_sint(protobuf.sint_to_uint(-2 ** 32)), -2 ** 32
)
def test_validate_enum(self):
# ok message:
msg = Message(-42, 5)
length = protobuf.count_message(msg)
buffer_writer = BufferWriter(bytearray(length))
protobuf.dump_message(buffer_writer, msg)
buffer_reader = BufferReader(buffer_writer.buffer)
nmsg = protobuf.load_message(buffer_reader, Message)
self.assertEqual(msg.sint_field, nmsg.sint_field)
self.assertEqual(msg.enum_field, nmsg.enum_field)
# bad enum value:
buffer_writer.seek(0)
msg = Message(-42, 42)
# XXX this assumes the message will have equal size
protobuf.dump_message(buffer_writer, msg)
buffer_reader.seek(0)
with self.assertRaises(TypeError):
protobuf.load_message(buffer_reader, Message)
if __name__ == "__main__":
unittest.main()