code: def testEmpty(self):
      gen = VectorInput([])
      leq = sLeq()
      p = Pool()
  
      gen.data >> leq.signal
      leq.leq >> (p, "leq")
  
      run(gen)
  
      self.assertEqual(len(p.descriptorNames()), 0)
  
imports: from essentia_test import *
  from essentia.streaming import Leq
  from math import sin, pi
label_desc: Use image node_id 1 for calling the TestLeq_Streaming obj's underlying member method code with example usage: obj.testEmpty() without return types