code: def test_run(self):
      model = "text-embedding-ada-002"
  
      embedder = OpenAITextEmbedder(
          model=model, prefix="prefix ", suffix=" suffix"
      )
      result = embedder.run(text="The food was delicious")
  
      assert len(result["embedding"]) == 1536
      assert all(isinstance(x, float) for x in result["embedding"])
      assert result["meta"] == {
          "model": "text-embedding-ada-002-v2",
          "usage": {"prompt_tokens": 6, "total_tokens": 6},
      }
  
file_path: haystack/test/components/embedders/test_openai_text_embedder.py
imports: import os
  import pytest
  from openai import OpenAIError
  from haystack.components.embedders.openai_text_embedder import OpenAITextEmbedder
label_desc: Use image node_id 7 for calling the TestOpenAITextEmbedder obj's underlying member method code with example usage: obj.test_run() without return types