docstr: Test that DynamoDBToS3Operator when called without export_time will call
  _export_table_to_point_in_time. Which implements point in time recovery logic
docstr_tok: ["Test","that","DynamoDBToS3Operator","when","called","without","export_time","will","call","_export_table_to_point_in_time",".","Which","implements","point","in","time","recovery","logic"]
code: def test_dynamodb_execute_calling_export_table_to_point_in_time(
      self, _export_table_to_point_in_time
  ):
      """Test that DynamoDBToS3Operator when called without export_time will call
      _export_table_to_point_in_time. Which implements point in time recovery logic
      """
      dynamodb_to_s3_operator = DynamoDBToS3Operator(
          task_id="dynamodb_to_s3",
          dynamodb_table_name="airflow_rocks",
          s3_bucket_name="airflow-bucket",
          file_size=4000,
          export_time=datetime(year=1983, month=1, day=1),
      )
      dynamodb_to_s3_operator.execute(context={})
      _export_table_to_point_in_time.assert_called()
  
imports: from __future__ import annotations
  import json
  from datetime import datetime
  from decimal import Decimal
  from unittest.mock import MagicMock, patch
  import pytest
  from airflow import DAG
  from airflow.exceptions import AirflowProviderDeprecationWarning
  from airflow.models import DagRun, TaskInstance
  from airflow.providers.amazon.aws.transfers.base import _DEPRECATION_MSG
  from airflow.providers.amazon.aws.transfers.dynamodb_to_s3 import DynamoDBToS3Operator, JSONEncoder
  from airflow.utils import timezone
label_desc: Use image node_id 12 for calling the TestDynamodbToS3 obj's underlying member method code with example usage: obj.test_dynamodb_execute_calling_export_table_to_point_in_time(_export_table_to_point_in_time) without return types