mirror of
https://github.com/Chia-Network/chia-blockchain.git
synced 2024-09-20 16:08:51 +03:00
289 lines
9.6 KiB
Python
289 lines
9.6 KiB
Python
from __future__ import annotations
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import io
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import struct
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from dataclasses import dataclass
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from decimal import Decimal
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from typing import Iterable, List, Optional, Type
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import pytest
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# TODO: update after resolution in https://github.com/pytest-dev/pytest/issues/7469
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from _pytest.fixtures import SubRequest
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# TODO: update after resolution in https://github.com/pytest-dev/pytest/issues/7469
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from _pytest.mark.structures import ParameterSet
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from typing_extensions import final
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from chia.util.ints import int8, int16, int32, int64, int512, uint8, uint16, uint32, uint64, uint128
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from chia.util.struct_stream import StructStream, parse_metadata_from_name
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def dataclass_parameter(instance: object) -> ParameterSet:
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return pytest.param(instance, id=repr(instance)[len(type(instance).__name__) + 1 : -1])
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def dataclass_parameters(instances: Iterable[object]) -> List[ParameterSet]:
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return [dataclass_parameter(instance) for instance in instances]
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@dataclass(frozen=True)
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class BadName:
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name: str
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error: str
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@final
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@dataclass(frozen=True)
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class Good:
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name: str
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cls: Type[StructStream]
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size: int
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bits: int
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signed: bool
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maximum_exclusive: int
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minimum: int
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@classmethod
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def create(
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cls,
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name: str,
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size: int,
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signed: bool,
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maximum_exclusive: int,
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minimum: int,
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) -> Good:
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raw_class: Type[StructStream] = type(name, (StructStream,), {})
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parsed_cls = parse_metadata_from_name(raw_class)
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return cls(
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name=name,
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cls=parsed_cls,
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size=size,
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bits=size * 8,
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signed=signed,
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maximum_exclusive=maximum_exclusive,
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minimum=minimum,
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)
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good_classes = [
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Good.create(name="uint8", size=1, signed=False, maximum_exclusive=0xFF + 1, minimum=0),
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Good.create(name="int8", size=1, signed=True, maximum_exclusive=0x80, minimum=-0x80),
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Good.create(name="uint16", size=2, signed=False, maximum_exclusive=0xFFFF + 1, minimum=0),
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Good.create(name="int16", size=2, signed=True, maximum_exclusive=0x8000, minimum=-0x8000),
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Good.create(name="uint24", size=3, signed=False, maximum_exclusive=0xFFFFFF + 1, minimum=0),
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Good.create(name="int24", size=3, signed=True, maximum_exclusive=0x800000, minimum=-0x800000),
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Good.create(
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name="uint128",
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size=16,
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signed=False,
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maximum_exclusive=0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF + 1,
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minimum=0,
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),
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Good.create(
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name="int128",
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size=16,
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signed=True,
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maximum_exclusive=0x80000000000000000000000000000000,
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minimum=-0x80000000000000000000000000000000,
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),
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]
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@pytest.fixture(
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name="good",
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params=dataclass_parameters(good_classes),
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)
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def good_fixture(request: SubRequest) -> Good:
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return request.param # type: ignore[no-any-return]
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class TestStructStream:
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def _test_impl(
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self,
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cls: Type[StructStream],
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upper_boundary: int,
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lower_boundary: int,
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length: int,
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struct_format: Optional[str],
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) -> None:
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with pytest.raises(ValueError):
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t = cls(upper_boundary + 1)
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with pytest.raises(ValueError):
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t = cls(lower_boundary - 1)
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t = cls(upper_boundary)
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assert t == upper_boundary
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t = cls(lower_boundary)
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assert t == lower_boundary
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t = cls(0)
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assert t == 0
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with pytest.raises(ValueError):
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cls.parse(io.BytesIO(b"\0" * (length - 1)))
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with pytest.raises(ValueError):
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cls.from_bytes(b"\0" * (length - 1))
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with pytest.raises(ValueError):
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cls.from_bytes(b"\0" * (length + 1))
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if struct_format is not None:
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bytes_io = io.BytesIO()
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cls(lower_boundary).stream(bytes_io)
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assert bytes_io.getvalue() == struct.pack(struct_format, lower_boundary)
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bytes_io = io.BytesIO()
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cls(upper_boundary).stream(bytes_io)
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assert bytes_io.getvalue() == struct.pack(struct_format, upper_boundary)
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with pytest.raises(struct.error):
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struct.pack(struct_format, lower_boundary - 1)
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with pytest.raises(struct.error):
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struct.pack(struct_format, upper_boundary + 1)
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def test_int512(self) -> None:
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# int512 is special. it uses 65 bytes to allow positive and negative
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# "uint512"
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self._test_impl(
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int512,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF, # noqa: E501
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-0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF, # noqa: E501
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length=65,
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struct_format=None,
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)
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def test_uint128(self) -> None:
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self._test_impl(uint128, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF, 0, length=16, struct_format=None)
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def test_uint64(self) -> None:
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self._test_impl(uint64, 0xFFFFFFFFFFFFFFFF, 0, length=8, struct_format="!Q")
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def test_int64(self) -> None:
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self._test_impl(int64, 0x7FFFFFFFFFFFFFFF, -0x8000000000000000, length=8, struct_format="!q")
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def test_uint32(self) -> None:
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self._test_impl(uint32, 0xFFFFFFFF, 0, length=4, struct_format="!L")
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def test_int32(self) -> None:
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self._test_impl(int32, 0x7FFFFFFF, -0x80000000, length=4, struct_format="!l")
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def test_uint16(self) -> None:
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self._test_impl(uint16, 0xFFFF, 0, length=2, struct_format="!H")
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def test_int16(self) -> None:
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self._test_impl(int16, 0x7FFF, -0x8000, length=2, struct_format="!h")
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def test_uint8(self) -> None:
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self._test_impl(uint8, 0xFF, 0, length=1, struct_format="!B")
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def test_int8(self) -> None:
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self._test_impl(int8, 0x7F, -0x80, length=1, struct_format="!b")
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def test_roundtrip(self) -> None:
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def roundtrip(v: StructStream) -> None:
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s = io.BytesIO()
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v.stream(s)
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s.seek(0)
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cls = type(v)
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v2 = cls.parse(s)
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assert v2 == v
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# int512 is special. it uses 65 bytes to allow positive and negative
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# "uint512"
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roundtrip(
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int512(
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF # noqa: E501
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)
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)
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roundtrip(
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int512(
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-0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF # noqa: E501
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)
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)
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roundtrip(uint128(0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))
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roundtrip(uint128(0))
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roundtrip(uint64(0xFFFFFFFFFFFFFFFF))
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roundtrip(uint64(0))
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roundtrip(int64(0x7FFFFFFFFFFFFFFF))
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roundtrip(int64(-0x8000000000000000))
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roundtrip(uint32(0xFFFFFFFF))
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roundtrip(uint32(0))
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roundtrip(int32(0x7FFFFFFF))
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roundtrip(int32(-0x80000000))
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roundtrip(uint16(0xFFFF))
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roundtrip(uint16(0))
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roundtrip(int16(0x7FFF))
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roundtrip(int16(-0x8000))
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roundtrip(uint8(0xFF))
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roundtrip(uint8(0))
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roundtrip(int8(0x7F))
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roundtrip(int8(-0x80))
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def test_uint32_from_decimal(self) -> None:
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assert uint32(Decimal("137")) == 137
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def test_uint32_from_float(self) -> None:
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assert uint32(4.0) == 4
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def test_uint32_from_str(self) -> None:
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assert uint32("43") == 43
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def test_uint32_from_bytes(self) -> None:
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assert uint32(b"273") == 273
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def test_struct_stream_cannot_be_instantiated_directly(self) -> None:
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with pytest.raises(ValueError, match="does not fit"):
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StructStream(0)
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@pytest.mark.parametrize(
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argnames="bad_name",
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argvalues=dataclass_parameters(
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instances=[
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BadName(name="uint", error="expected integer suffix but got: ''"),
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BadName(name="blue", error="expected integer suffix but got"),
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BadName(name="blue8", error="expected integer suffix but got: ''"),
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BadName(name="sint8", error="expected class name"),
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BadName(name="redint8", error="expected class name"),
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BadName(name="int7", error="must be a multiple of 8"),
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BadName(name="int9", error="must be a multiple of 8"),
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BadName(name="int31", error="must be a multiple of 8"),
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BadName(name="int0", error="bit size must greater than zero"),
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# below could not happen in a hard coded class name, but testing for good measure
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BadName(name="int-1", error="bit size must greater than zero"),
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],
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),
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)
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def test_parse_metadata_from_name_raises(self, bad_name: BadName) -> None:
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cls = type(bad_name.name, (StructStream,), {})
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with pytest.raises(ValueError, match=bad_name.error):
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parse_metadata_from_name(cls)
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def test_parse_metadata_from_name_correct_size(self, good: Good) -> None:
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assert good.cls.SIZE == good.size
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def test_parse_metadata_from_name_correct_bits(self, good: Good) -> None:
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assert good.cls.BITS == good.bits
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def test_parse_metadata_from_name_correct_signedness(self, good: Good) -> None:
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assert good.cls.SIGNED == good.signed
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def test_parse_metadata_from_name_correct_maximum(self, good: Good) -> None:
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assert good.cls.MAXIMUM_EXCLUSIVE == good.maximum_exclusive
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def test_parse_metadata_from_name_correct_minimum(self, good: Good) -> None:
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assert good.cls.MINIMUM == good.minimum
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