'test _silent_delete_volume fails silently without exception'

def test_silent_delete_volume(self):

    driver = mock.MagicMock()
    driver.VERSION = 'VERSION'
    p = self.proxy(self.default_storage_info, mock.MagicMock(), test_mock.cinder.exception, driver)
    p.ibm_storage_cli = mock.MagicMock()
    p.ibm_storage_cli.cmd.vol_delete.side_effect = errors.XCLIError('bla', 'bla', ElementTree.Element('bla'))
    p._silent_delete_volume(TEST_VOLUME)
