'check_for_setup_error throws if client is not installed.'

def test_check_for_setup_error_throws_client_not_installed(self):

    drv = self._driver
    drv._execute = mock.Mock(side_effect=OSError(errno.ENOENT, 'No    such    file    or    directory'))
    self.assertRaisesAndMessageMatches(exception.VolumeDriverException, 'mount.quobyte    is    not    installed', drv.check_for_setup_error)
    drv._execute.assert_called_once_with('mount.quobyte', check_exit_code=False, run_as_root=False)
