code: def test_get_execution_time(self, tracker: QueryExecTracker):
      def mock_function(*args, **kwargs):
          time.sleep(1)
          return "Mock Result"
  
      # Sleep for a while to simulate execution time
      with patch("time.time", return_value=0):
          tracker.execute_func(mock_function, tag="cache_hit")
  
      # Get the execution time
      execution_time = tracker.get_execution_time()
  
      # Check if the execution time is approximately 1 second
      assert_almost_equal(execution_time, 1.0, delta=0.3)
  
imports: import json
  import os
  import time
  from typing import Optional
  from unittest.mock import MagicMock, Mock, patch
  import pandas
  import pytest
  from pandasai.helpers.query_exec_tracker import QueryExecTracker
  from pandasai.llm.fake import FakeLLM
  from pandasai.smart_dataframe import SmartDataframe
  from unittest import TestCase
  from datetime import datetime, timedelta
label_desc: Use image node_id 13 for calling the TestQueryExecTracker obj's underlying member method code with example usage: obj.test_get_execution_time(tracker) and returns: str