code: def testLinToDb(self):
      lin = 12.34
      expected_db = 10 * math.log10(lin)
      self.assertAlmostEqual(expected_db, lin2db(lin))
  
file_path: essentia/test/src/unittests/base/test_utils.py
imports: from essentia_test import *
  import math
  import cmath
  import sys
label_desc: Use image node_id 5 for calling the TestUtils obj's underlying member method code with example usage: obj.testLinToDb() without return types