'Config: add_extra_torznab should raise on None adding'

@TestArgs(None, [], [1, 2, 3], [True])
def test_add_extra_torznab_raise_on_none(self, initial):

    path = '/tmp/notexist'
    self.config_mock['Torznab'] = {'extra_torznabs': initial}
    c = headphones.config.Config(path)
    with self.assertRaises(TypeError):
        c.add_extra_torznab(None)
    pass
