code: def test_negative(self):
      with self.assertRaises(ValueError):
          specdesc("default", -10)
  
imports: from numpy.testing import TestCase, assert_equal, assert_almost_equal
  from numpy import random, arange, log, zeros
  from aubio import specdesc, cvec, float_type
label_desc: Use image node_id 1 for calling the aubio_specdesc_wrong obj's underlying member method code with example usage: obj.test_negative() without return types