code: def testSquarePeak(self):
      self.assertAlmostEqual(
          StrongPeak()([0, 0, 0, 3, 3, 3, 0, 0, 0]),
          3 / math.log10(6 / 3.0),
      )
  
file_path: essentia/test/src/unittests/spectral/test_strongpeak.py
imports: import math
  from essentia_test import *
label_desc: Use image node_id 9 for calling the TestStrongPeak obj's underlying member method code with example usage: obj.testSquarePeak() without return types