code: def test_power_to_db(self):
      spectrogram = np.zeros((2, 3))
      spectrogram[0, 0] = 2.0
      spectrogram[0, 1] = 0.5
      spectrogram[0, 2] = 0.707
      spectrogram[1, 1] = 1.0
  
      output = power_to_db(spectrogram, reference=1.0)
      expected = np.array(
          [
              [3.01029996, -3.01029996, -1.50580586],
              [-100.0, 0.0, -100.0],
          ]
      )
      self.assertTrue(np.allclose(output, expected))
  
      output = power_to_db(spectrogram, reference=2.0)
      expected = np.array(
          [
              [0.0, -6.02059991, -4.51610582],
              [-103.01029996, -3.01029996, -103.01029996],
          ]
      )
      self.assertTrue(np.allclose(output, expected))
  
      output = power_to_db(spectrogram, min_value=1e-6)
      expected = np.array(
          [[3.01029996, -3.01029996, -1.50580586], [-60.0, 0.0, -60.0]]
      )
      self.assertTrue(np.allclose(output, expected))
  
      output = power_to_db(spectrogram, db_range=80)
      expected = np.array(
          [
              [3.01029996, -3.01029996, -1.50580586],
              [-76.98970004, 0.0, -76.98970004],
          ]
      )
      self.assertTrue(np.allclose(output, expected))
  
      output = power_to_db(spectrogram, reference=2.0, db_range=80)
      expected = np.array(
          [[0.0, -6.02059991, -4.51610582], [-80.0, -3.01029996, -80.0]]
      )
      self.assertTrue(np.allclose(output, expected))
  
      output = power_to_db(
          spectrogram, reference=2.0, min_value=1e-6, db_range=80
      )
      expected = np.array(
          [
              [0.0, -6.02059991, -4.51610582],
              [-63.01029996, -3.01029996, -63.01029996],
          ]
      )
      self.assertTrue(np.allclose(output, expected))
  
      with pytest.raises(ValueError):
          power_to_db(spectrogram, reference=0.0)
      with pytest.raises(ValueError):
          power_to_db(spectrogram, min_value=0.0)
      with pytest.raises(ValueError):
          power_to_db(spectrogram, db_range=-80)
  
imports: import unittest
  import numpy
  import pytest
  from transformers.audio_utils import amplitude_to_db, hertz_to_mel, mel_filter_bank, mel_to_hertz, power_to_db, spectrogram, window_function
label_desc: Use image node_id 16 for calling the AudioUtilsFunctionTester obj's underlying member method code with example usage: obj.test_power_to_db() without return types