code: def testZero(self):
      self.assertEqualVector(
          SaturationDetector()(esarr(np.zeros(512)))[0], esarr([])
      )
  
file_path: essentia/test/src/unittests/audioproblems/test_saturationdetector.py
imports: import numpy
  from math import *
  from essentia_test import *
  from essentia import array
label_desc: Use image node_id 1 for calling the TestSaturationDetector obj's underlying member method code with example usage: obj.testZero() without return types