code: def test_simple_wav2vec2(self):
      model = Wav2Vec2ForCTC.from_pretrained(
          "facebook/wav2vec2-base-960h"
      )
      tokenizer = AutoTokenizer.from_pretrained(
          "facebook/wav2vec2-base-960h"
      )
      feature_extractor = AutoFeatureExtractor.from_pretrained(
          "facebook/wav2vec2-base-960h"
      )
  
      asr = AutomaticSpeechRecognitionPipeline(
          model=model,
          tokenizer=tokenizer,
          feature_extractor=feature_extractor,
      )
  
      waveform = np.tile(np.arange(1000, dtype=np.float32), 34)
      output = asr(waveform)
      self.assertEqual(output, {"text": ""})
  
      ds = load_dataset(
          "hf-internal-testing/librispeech_asr_dummy",
          "clean",
          split="validation",
      ).sort("id")
      filename = ds[40]["file"]
      output = asr(filename)
      self.assertEqual(
          output, {"text": "A MAN SAID TO THE UNIVERSE SIR I EXIST"}
      )
  
      filename = ds[40]["file"]
      with open(filename, "rb") as f:
          data = f.read()
      output = asr(data)
      self.assertEqual(
          output, {"text": "A MAN SAID TO THE UNIVERSE SIR I EXIST"}
      )
  
imports: import unittest
  import numpy
  import pytest
  from datasets import Audio, load_dataset
  from huggingface_hub import hf_hub_download, snapshot_download
  from transformers import MODEL_FOR_CTC_MAPPING, MODEL_FOR_SPEECH_SEQ_2_SEQ_MAPPING, AutoFeatureExtractor, AutoProcessor, AutoTokenizer, Speech2TextForConditionalGeneration, Wav2Vec2ForCTC, WhisperForConditionalGeneration
  from transformers.pipelines import AutomaticSpeechRecognitionPipeline, pipeline
  from transformers.pipelines.audio_utils import chunk_bytes_iter
  from transformers.pipelines.automatic_speech_recognition import _find_timestamp_sequence, chunk_iter
  from transformers.testing_utils import is_pipeline_test, is_torch_available, nested_simplify, require_pyctcdecode, require_tf, require_torch, require_torch_accelerator, require_torchaudio, slow, torch_device
  from .test_pipelines_common import ANY
label_desc: Use image node_id 19 for calling the AutomaticSpeechRecognitionPipelineTests obj's underlying member method code with example usage: obj.test_simple_wav2vec2() without return types