code: def dummy_dag():
      """Fixture to provide a dummy Airflow DAG for testing."""
      return DAG(dag_id="test_dag", start_date=datetime(2023, 9, 29))
  
file_path: airflow/tests/providers/pinecone/operators/test_pinecone.py
imports: from __future__ import annotations
  from datetime import datetime
  from unittest.mock import Mock, patch
  import pytest
  from airflow.models import DAG
  from airflow.providers.pinecone.operators.pinecone import PineconeIngestOperator
label_desc: Use image node_id 1 for calling a global function with example usage: dummy_dag() and returns: DAG