code: def test_warmup_doesnt_reload(self, mocked_factory):
      embedder = SentenceTransformersTextEmbedder(model="model")
      mocked_factory.get_embedding_backend.assert_not_called()
      embedder.warm_up()
      embedder.warm_up()
      mocked_factory.get_embedding_backend.assert_called_once()
  
file_path: haystack/test/components/embedders/test_sentence_transformers_text_embedder.py
imports: from unittest.mock import patch, MagicMock
  import pytest
  import numpy
  from haystack.components.embedders.sentence_transformers_text_embedder import SentenceTransformersTextEmbedder
label_desc: Use image node_id 7 for calling the TestSentenceTransformersTextEmbedder obj's underlying member method code with example usage: obj.test_warmup_doesnt_reload(mocked_factory) without return types