def METHOD_NAME(self, get_operation_processor):
    processor = MagicMock()
    get_operation_processor.return_value = processor
    with self._exp() as exp:
        path, wait = (
            self._random_path(),
            self._random_wait(),
        )
        var = StringSet(exp, path)
        var.clear(wait=wait)
        processor.enqueue_operation.assert_called_with(ClearStringSet(path), wait=wait)