code: def test_chebdiv(self):
      for i in range(5):
          for j in range(5):
              msg = f"At i={i}, j={j}"
              ci = [0] * i + [1]
              cj = [0] * j + [1]
              tgt = cheb.chebadd(ci, cj)
              quo, rem = cheb.chebdiv(tgt, ci)
              res = cheb.chebadd(cheb.chebmul(quo, ci), rem)
              assert_equal(trim(res), trim(tgt), err_msg=msg)
  
imports: from functools import reduce
  import numpy
  import numpy.polynomial.chebyshev
  from numpy.polynomial.polynomial import polyval
  from numpy.testing import assert_almost_equal, assert_raises, assert_equal, assert_
label_desc: Use image node_id 5 for calling the TestArithmetic obj's underlying member method code with example usage: obj.test_chebdiv() without return types