1# This file is dual licensed under the terms of the Apache License, Version
2# 2.0, and the BSD License. See the LICENSE file in the root of this repository
3# for complete details.
4
5from __future__ import absolute_import, division, print_function
6
7import pytest
8
9from cryptography.hazmat.primitives import constant_time
10
11
12class TestConstantTimeBytesEq(object):
13    def test_reject_unicode(self):
14        with pytest.raises(TypeError):
15            constant_time.bytes_eq(b"foo", u"foo")
16
17        with pytest.raises(TypeError):
18            constant_time.bytes_eq(u"foo", b"foo")
19
20        with pytest.raises(TypeError):
21            constant_time.bytes_eq(u"foo", u"foo")
22
23    def test_compares(self):
24        assert constant_time.bytes_eq(b"foo", b"foo") is True
25
26        assert constant_time.bytes_eq(b"foo", b"bar") is False
27
28        assert constant_time.bytes_eq(b"foobar", b"foo") is False
29
30        assert constant_time.bytes_eq(b"foo", b"foobar") is False
31