code: def test_bspline_default_extrap(self, xp, scp):
      # BSpline defaults to extrapolate=True
      b = self._make_random_spline(xp, scp)
      t, _, k = b.tck
      xx = [t[0] - 1, t[-1] + 1]
      yy = b(xx)
      return not xp.all(xp.isnan(yy))
  
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 11 for calling the TestBSpline obj's underlying member method code with example usage: obj.test_bspline_default_extrap(xp, scp) and returns: unknown