'should not try to delete volume if the volume id is None.'

@mock.patch.object(helper.DS8KCommonHelper, '_delete_lun')
def test_delete_volume_return_if_no_volume_id(self, mock_delete_lun):

    self.driver = FakeDS8KProxy(self.storage_info, self.logger, self.exception, self)
    self.driver.setup(self.ctxt)
    volume = self._create_volume()
    self.driver.delete_volume(volume)
    self.assertFalse(mock_delete_lun.called)
