code: def test_polyvandernegdeg(self):
      x = np.arange(3)
      assert_raises(ValueError, poly.polyvander, x, -1)
  
imports: from functools import reduce
  import numpy
  import numpy.polynomial.polynomial
  import pickle
  from copy import deepcopy
  from numpy.testing import assert_almost_equal, assert_raises, assert_equal, assert_, assert_warns, assert_array_equal, assert_raises_regex
label_desc: Use image node_id 4 for calling the TestVander obj's underlying member method code with example usage: obj.test_polyvandernegdeg() without return types