code: def test_normalize_intensity(self):
      intensity = audaugs.normalize_intensity(metadata={}, norm=np.inf)
      self.assertAlmostEqual(intensity, 100.0)
  
imports: import unittest
  import numpy
  from augly import audio
label_desc: Use image node_id 12 for calling the IntensityAudioUnitTest obj's underlying member method code with example usage: obj.test_normalize_intensity() without return types