code: def setUp(self):
      self.feat_extract_tester = Wav2Vec2FeatureExtractionTester(self)
  
imports: import itertools
  import random
  import unittest
  import numpy
  from transformers import WAV_2_VEC_2_PRETRAINED_MODEL_ARCHIVE_LIST, Wav2Vec2Config, Wav2Vec2FeatureExtractor
  from transformers.testing_utils import require_torch, slow
  from ...test_sequence_feature_extraction_common import SequenceFeatureExtractionTestMixin
label_desc: Use image node_id 1 for calling the Wav2Vec2FeatureExtractionTest obj's underlying member method code with example usage: obj.setUp() without return types