test_tools.py

#!/usr/bin/env python
# Stegano - Stegano is a pure Python steganography module.
# Copyright (C) 2010-2024 Cédric Bonhomme - https://www.cedricbonhomme.org
#
# For more information : https://github.com/cedricbonhomme/Stegano
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>

__author__ = "Cedric Bonhomme"
__version__ = "$Revision: 0.1 $"
__date__ = "$Date: 2017/02/22 $"
__revision__ = "$Date: 2017/02/22 $"
__license__ = "GPLv3"

import unittest

from stegano import tools


class TestTools(unittest.TestCase):
    def test_a2bits(self):
        bits = tools.a2bits("Hello World!")
        self.assertEqual(
            bits,
            "010010000110010101101100011011000110111100100000010101110110111101110010011011000110010000100001",
        )

    def test_a2bits_list_UTF8(self):
        list_of_bits = tools.a2bits_list("Hello World!")
        self.assertEqual(
            list_of_bits,
            [
                "01001000",
                "01100101",
                "01101100",
                "01101100",
                "01101111",
                "00100000",
                "01010111",
                "01101111",
                "01110010",
                "01101100",
                "01100100",
                "00100001",
            ],
        )

    def test_a2bits_list_UTF32LE(self):
        list_of_bits = tools.a2bits_list("Hello World!", "UTF-32LE")
        self.assertEqual(
            list_of_bits,
            [
                "00000000000000000000000001001000",
                "00000000000000000000000001100101",
                "00000000000000000000000001101100",
                "00000000000000000000000001101100",
                "00000000000000000000000001101111",
                "00000000000000000000000000100000",
                "00000000000000000000000001010111",
                "00000000000000000000000001101111",
                "00000000000000000000000001110010",
                "00000000000000000000000001101100",
                "00000000000000000000000001100100",
                "00000000000000000000000000100001",
            ],
        )

    def test_n_at_a_time(self):
        result = tools.n_at_a_time([1, 2, 3, 4, 5], 2, "X")
        self.assertEqual(list(result), [(1, 2), (3, 4), (5, "X")])

    def test_binary2base64(self):
        with open("./tests/expected-results/binary2base64") as f:
            expected_value = f.read()
        value = tools.binary2base64("tests/sample-files/free-software-song.ogg")
        self.assertEqual(expected_value, value)