code: def testEmpty(self):
      empty = np.array([], dtype=np.single)
      r = ResampleFFT()
      with self.assertRaises(RuntimeError):
          r(empty)
  
file_path: essentia/test/src/unittests/synthesis/test_resamplefft_standard.py
imports: from essentia_test import *
  import numpy
label_desc: Use image node_id 1 for calling the TestResampleFFT obj's underlying member method code with example usage: obj.testEmpty() without return types