code: def test_warmup_doesnt_reload(self):
      with patch(
          "haystack.components.audio.whisper_local.whisper"
      ) as mocked_whisper:
          transcriber = LocalWhisperTranscriber(model="large-v2")
          transcriber.warm_up()
          transcriber.warm_up()
          mocked_whisper.load_model.assert_called_once()
  
file_path: haystack/test/components/audio/test_whisper_local.py
imports: import sys
  from pathlib import Path
  from unittest.mock import patch, MagicMock
  import pytest
  import torch
  from haystack.dataclasses import Document, ByteStream
  from haystack.components.audio import LocalWhisperTranscriber
label_desc: Use image node_id 6 for calling the TestLocalWhisperTranscriber obj's underlying member method code with example usage: obj.test_warmup_doesnt_reload() without return types