mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-27 01:48:17 +00:00
127 lines
3.6 KiB
Python
127 lines
3.6 KiB
Python
from common import *
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import protobuf
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if False:
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from typing import Awaitable, Dict
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class Message(protobuf.MessageType):
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def __init__(self, uint_field: int = 0, enum_field: int = 0) -> None:
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self.sint_field = uint_field
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self.enum_field = enum_field
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@classmethod
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def get_fields(cls) -> Dict:
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return {
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1: ("sint_field", protobuf.SVarintType, 0),
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2: ("enum_field", protobuf.EnumType("t", (0, 5, 25)), 0),
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}
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class ByteReader:
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def __init__(self, data: bytes) -> None:
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self.data = data
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self.pos = 0
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async def areadinto(self, buf: bytearray) -> int:
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remaining = len(self.data) - self.pos
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limit = len(buf)
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if remaining < limit:
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raise EOFError
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buf[:] = self.data[self.pos : self.pos + limit]
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self.pos += limit
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return limit
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class ByteArrayWriter:
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def __init__(self) -> None:
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self.buf = bytearray(0)
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async def awrite(self, buf: bytes) -> int:
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self.buf.extend(buf)
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return len(buf)
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def run_until_complete(task: Awaitable) -> Any:
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value = None
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while True:
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try:
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result = task.send(value)
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except StopIteration as e:
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return e.value
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if result:
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value = run_until_complete(result)
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else:
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value = None
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def load_uvarint(data: bytes) -> int:
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reader = ByteReader(data)
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return run_until_complete(protobuf.load_uvarint(reader))
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def dump_uvarint(value: int) -> bytearray:
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writer = ByteArrayWriter()
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run_until_complete(protobuf.dump_uvarint(writer, value))
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return writer.buf
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class TestProtobuf(unittest.TestCase):
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def test_dump_uvarint(self):
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self.assertEqual(dump_uvarint(0), b"\x00")
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self.assertEqual(dump_uvarint(1), b"\x01")
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self.assertEqual(dump_uvarint(0xFF), b"\xff\x01")
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self.assertEqual(dump_uvarint(123456), b"\xc0\xc4\x07")
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with self.assertRaises(ValueError):
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dump_uvarint(-1)
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def test_load_uvarint(self):
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self.assertEqual(load_uvarint(b"\x00"), 0)
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self.assertEqual(load_uvarint(b"\x01"), 1)
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self.assertEqual(load_uvarint(b"\xff\x01"), 0xFF)
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self.assertEqual(load_uvarint(b"\xc0\xc4\x07"), 123456)
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def test_sint_uint(self):
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self.assertEqual(protobuf.uint_to_sint(0), 0)
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self.assertEqual(protobuf.sint_to_uint(0), 0)
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self.assertEqual(protobuf.sint_to_uint(-1), 1)
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self.assertEqual(protobuf.sint_to_uint(1), 2)
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self.assertEqual(protobuf.uint_to_sint(1), -1)
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self.assertEqual(protobuf.uint_to_sint(2), 1)
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# roundtrip:
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self.assertEqual(
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protobuf.uint_to_sint(protobuf.sint_to_uint(1234567891011)), 1234567891011
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)
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self.assertEqual(
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protobuf.uint_to_sint(protobuf.sint_to_uint(-2 ** 32)), -2 ** 32
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)
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def test_validate_enum(self):
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# ok message:
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msg = Message(-42, 5)
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writer = ByteArrayWriter()
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run_until_complete(protobuf.dump_message(writer, msg))
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reader = ByteReader(bytes(writer.buf))
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nmsg = run_until_complete(protobuf.load_message(reader, Message))
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self.assertEqual(msg.sint_field, nmsg.sint_field)
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self.assertEqual(msg.enum_field, nmsg.enum_field)
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# bad enum value:
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msg = Message(-42, 42)
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writer = ByteArrayWriter()
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run_until_complete(protobuf.dump_message(writer, msg))
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reader = ByteReader(bytes(writer.buf))
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with self.assertRaises(TypeError):
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run_until_complete(protobuf.load_message(reader, Message))
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if __name__ == "__main__":
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unittest.main()
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