class SoftwarePropertiesTestCase(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        for k in apt_pkg.config.keys():
            apt_pkg.config.clear(k)
        apt_pkg.init()

    def setUp(self):
        self.temp_dir = tempfile.mkdtemp()
        self.sp = SoftwareProperties()
        self.mock_key = os.path.join(self.temp_dir, u"määäp.asc")
        with open(self.mock_key, "wb") as fp:
            fp.write(u"bäää".encode("utf-8"))

    def tearDown(self):
        shutil.rmtree(self.temp_dir)

    def test_add_key_str(self):
        with patch.object(self.sp, "apt_key") as mock_apt_key:
            self.sp.add_key(self.mock_key)
        self.assertTrue(mock_apt_key.add.called)

    def test_add_key_bytes(self):
        with patch.object(self.sp, "apt_key") as mock_apt_key:
            mock_name_as_bytes = self.mock_key.encode("utf-8")
            self.sp.add_key(mock_name_as_bytes)
        self.assertTrue(mock_apt_key.add.called)