code: def test_basis_element_rndm(self, xp, scp):
      b = self._make_random_spline(xp, scp)
      t, c, k = b.tck
      xx = xp.linspace(t[k], t[-k - 1], 20)
      n = len(t) - (k + 1)
      s = 0.0
      for i in range(n):
          b = scp.interpolate.BSpline.basis_element(
              t[i : i + k + 2], extrapolate=False
          )(xx)
          # zero out out-of-bounds elements
          s += c[i] * xp.nan_to_num(b)
      return s
  
imports: import pytest
  import inspect
  from cupy import testing
  from cupy_backends.cuda.api import driver
  from cupy_backends.cuda.api import runtime
  import numpy
  import cupyx.scipy.interpolate
label_desc: Use image node_id 17 for calling the TestBSpline obj's underlying member method code with example usage: obj.test_basis_element_rndm(xp, scp) and returns: s