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# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.
from __future__ import absolute_import, division, print_function
import pytest
from cryptography import utils
def test_int_from_bytes_bytearray():
assert utils.int_from_bytes(bytearray(b"\x02\x10"), "big") == 528
with pytest.raises(TypeError):
utils.int_from_bytes(["list", "is", "not", "bytes"], "big")
class TestCachedProperty(object):
def test_simple(self):
accesses = []
class T(object):
@utils.cached_property
def t(self):
accesses.append(None)
return 14
assert T.t
t = T()
assert t.t == 14
assert len(accesses) == 1
assert t.t == 14
assert len(accesses) == 1
t = T()
assert t.t == 14
assert len(accesses) == 2
assert t.t == 14
assert len(accesses) == 2
def test_set(self):
accesses = []
class T(object):
@utils.cached_property
def t(self):
accesses.append(None)
return 14
t = T()
with pytest.raises(AttributeError):
t.t = None
assert len(accesses) == 0
assert t.t == 14
assert len(accesses) == 1
with pytest.raises(AttributeError):
t.t = None
assert len(accesses) == 1
assert t.t == 14
assert len(accesses) == 1
def test_bit_length():
assert utils.bit_length(1) == 1
assert utils.bit_length(11) == 4
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