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import pytest
from hypothesis import (
given,
strategies as st,
)
from eth_utils.encoding import (
big_endian_to_int,
int_to_big_endian,
)
@pytest.mark.parametrize(
"as_int,as_big_endian",
(
(0, b"\x00"),
(1, b"\x01"),
(7, b"\x07"),
(8, b"\x08"),
(9, b"\x09"),
(256, b"\x01\x00"),
(2**256 - 1, b"\xff" * 32),
),
)
def test_big_endian_conversions(as_int, as_big_endian):
as_int_result = big_endian_to_int(as_big_endian)
assert as_int_result == as_int
as_big_endian_result = int_to_big_endian(as_int)
assert as_big_endian_result == as_big_endian
@given(value=st.integers(min_value=0, max_value=2**256 - 1))
def test_big_endian_round_trip_from_int(value):
result = big_endian_to_int(int_to_big_endian(value))
assert result == value
@given(
value=st.binary(min_size=1, max_size=32).map(lambda v: v.lstrip(b"\x00") or b"\x00")
)
def test_big_endian_round_trip_from_big_endian(value):
result = int_to_big_endian(big_endian_to_int(value))
assert result == value
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