def test_to_bytes_overflow():
value = unhexlify(b"DEEADBEEFF")
mpi = MPI.from_bytes(value, byteorder="big")
with pytest.raises(OverflowError):
mpi.to_bytes(2, byteorder="big")
def test_from_empty_bytes():
value = b""
big = MPI.from_bytes(value, byteorder="big")
little = MPI.from_bytes(value, byteorder="little")
assert big == little == 0
assert big.bit_length() == little.bit_length() == 0
def test_from_bytes():
value = unhexlify(b"DEADBEEF")
mpi = MPI.from_bytes(value, byteorder="big")
assert mpi.to_bytes(4, byteorder="big") == unhexlify(b"DEADBEEF")
assert mpi.to_bytes(4, byteorder="little") == unhexlify(b"EFBEADDE")
assert mpi == int(hexlify(value), 16)
def test_from_bytes():
value = unhexlify(b"DEEADBEEFF")
mpi = MPI.from_bytes(value, byteorder="big")
assert mpi.to_bytes(5, byteorder="big") == value
assert mpi.to_bytes(5, byteorder="little") == value[::-1]
assert mpi == int(hexlify(value), 16)