mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-26 00:08:10 +00:00
91 lines
2.4 KiB
Python
91 lines
2.4 KiB
Python
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from io import BytesIO
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import pytest
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from trezorlib import protobuf
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class PrimitiveMessage(protobuf.MessageType):
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FIELDS = {
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0: ("uvarint", protobuf.UVarintType, 0),
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1: ("svarint", protobuf.SVarintType, 0),
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2: ("bool", protobuf.BoolType, 0),
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3: ("bytes", protobuf.BytesType, 0),
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4: ("unicode", protobuf.UnicodeType, 0),
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}
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def load_uvarint(buffer):
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reader = BytesIO(buffer)
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return protobuf.load_uvarint(reader)
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def dump_uvarint(value):
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writer = BytesIO()
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protobuf.dump_uvarint(writer, value)
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return writer.getvalue()
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def test_dump_uvarint():
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assert dump_uvarint(0) == b'\x00'
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assert dump_uvarint(1) == b'\x01'
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assert dump_uvarint(0xff) == b'\xff\x01'
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assert dump_uvarint(123456) == b'\xc0\xc4\x07'
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with pytest.raises(ValueError):
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dump_uvarint(-1)
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def test_load_uvarint():
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assert load_uvarint(b'\x00') == 0
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assert load_uvarint(b'\x01') == 1
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assert load_uvarint(b'\xff\x01') == 0xff
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assert load_uvarint(b'\xc0\xc4\x07') == 123456
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def test_sint_uint():
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"""
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Protobuf interleaved signed encoding
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https://developers.google.com/protocol-buffers/docs/encoding#structure
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LSbit is sign, rest is shifted absolute value.
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Or, by example, you count like so: 0, -1, 1, -2, 2, -3 ...
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"""
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assert protobuf.sint_to_uint(0) == 0
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assert protobuf.uint_to_sint(0) == 0
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assert protobuf.sint_to_uint(-1) == 1
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assert protobuf.sint_to_uint(1) == 2
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assert protobuf.uint_to_sint(1) == -1
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assert protobuf.uint_to_sint(2) == 1
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# roundtrip:
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assert protobuf.uint_to_sint(
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protobuf.sint_to_uint(1234567891011)
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) == 1234567891011
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assert protobuf.uint_to_sint(
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protobuf.sint_to_uint(- 2 ** 32)
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) == - 2 ** 32
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def test_simple_message():
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msg = PrimitiveMessage(
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uvarint=12345678910,
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svarint=-12345678910,
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bool=True,
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bytes=b'\xDE\xAD\xCA\xFE',
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unicode="Příliš žluťoučký kůň úpěl ďábelské ódy 😊",
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)
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buf = BytesIO()
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protobuf.dump_message(buf, msg)
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buf.seek(0)
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retr = protobuf.load_message(buf, PrimitiveMessage)
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assert msg == retr
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assert retr.uvarint == 12345678910
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assert retr.svarint == -12345678910
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assert retr.bool is True
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assert retr.bytes == b'\xDE\xAD\xCA\xFE'
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assert retr.unicode == "Příliš žluťoučký kůň úpěl ďábelské ódy 😊"
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