def test_execute(self, mock_hive_metastore_hook, mock_presto_hook, mock_mysql_hook, mock_json_dumps):
        mock_hive_metastore_hook.return_value.get_table.return_value.sd.cols = [fake_col]
        mock_mysql_hook.return_value.get_records.return_value = False

        hive_stats_collection_operator = HiveStatsCollectionOperator(**self.kwargs)
        hive_stats_collection_operator.execute(context={})

        mock_hive_metastore_hook.assert_called_once_with(
            metastore_conn_id=hive_stats_collection_operator.metastore_conn_id
        )
        mock_hive_metastore_hook.return_value.get_table.assert_called_once_with(
            table_name=hive_stats_collection_operator.table
        )
        mock_presto_hook.assert_called_once_with(presto_conn_id=hive_stats_collection_operator.presto_conn_id)
        mock_mysql_hook.assert_called_once_with(hive_stats_collection_operator.mysql_conn_id)
        mock_json_dumps.assert_called_once_with(hive_stats_collection_operator.partition, sort_keys=True)
        field_types = {
            col.name: col.type for col in mock_hive_metastore_hook.return_value.get_table.return_value.sd.cols
        }
        exprs = {('', 'count'): 'COUNT(*)'}
        for col, col_type in list(field_types.items()):
            exprs.update(hive_stats_collection_operator.get_default_exprs(col, col_type))
        exprs = OrderedDict(exprs)
        rows = [
            (
                hive_stats_collection_operator.ds,
                hive_stats_collection_operator.dttm,
                hive_stats_collection_operator.table,
                mock_json_dumps.return_value,
            )
            + (r[0][0], r[0][1], r[1])
            for r in zip(exprs, mock_presto_hook.return_value.get_first.return_value)
        ]
        mock_mysql_hook.return_value.insert_rows.assert_called_once_with(
            table='hive_stats',
            rows=rows,
            target_fields=[
                'ds',
                'dttm',
                'table_name',
                'partition_repr',
                'col',
                'metric',
                'value',
            ],
        )