code: def testZero(self):
      inputSize = 1024
      input = [0] * inputSize
      expected = input[:]
      output = Scale()(input)
      self.assertEqualVector(output, input)
  
imports: from essentia_test import *
label_desc: Use image node_id 2 for calling the TestScale obj's underlying member method code with example usage: obj.testZero() without return types