code: def test_bspline_endpoints(self, xp, scp):
      # base interval is closed
      b = self._make_random_spline(xp, scp)
      t, _, k = b.tck
      tm, tp = t[k], t[-k - 1]
      return (
          b(xp.asarray([tm, tp]), extrapolate=self.extrapolate),
          b(
              xp.asarray([tm + 1e-10, tp - 1e-10]),
              extrapolate=self.extrapolate,
          ),
      )
  
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 8 for calling the TestBSpline obj's underlying member method code with example usage: obj.test_bspline_endpoints(xp, scp) and returns: b,  b