code: def testZero(self):
      self.assertEqualVector(
          FFTC()(zeros(2048).astype(numpy.complex64)),
          zeros(1025).astype(numpy.complex64),
      )
  
file_path: essentia/test/src/unittests/standard/test_fftc.py
imports: from essentia_test import *
  import math
label_desc: Use image node_id 3 for calling the TestFFT obj's underlying member method code with example usage: obj.testZero() without return types